Disk crash , LVM and ext2... (bis)

(yesterday I wrote to [email protected], but it seems that it wasn't the good place for my problem as nobody answer me :o| )

My problem, is that I set a VG over 3 IDE disk, and that the first one crashed. I started writing a tool to recover my data but this tool need to only read the data that belong to the Ext2 filesystem. Originally, there were 4 LV in the VG. Would I be able to access the remaining data of LVs ? And how could I do that ?

I added the output of vgscan, pvdisplay and pvdata.

Thanks a lot.

-=( manu )=-

vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of volume group "main" from physical volume(s) vgscan -- reading all physical volumes (this may take a while...)
vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created
vgscan -- WARNING: This program does not do a VGDA backup of your volume group

--- Physical volume ---

PV Name               /dev/hdb1
VG Name               main
PV Size               37.27 GB [78165297 secs] / NOT usable 32.18 MB [LVM: 128 KB]
PV#                   3
PV Status             NOT available
Allocatable           yes (but full)
Cur LV                1
PE Size (KByte)       32768
Total PE              1191
Free PE               0
Allocated PE          1191
PV UUID               qfTbN9-v2rh-jxrq-gbRj-V6hs-H7CJ-RkuuJU

--- Physical volume ---

PV Name               /dev/hdc1
VG Name               main
PV Size               74.53 GB [156301425 secs] / NOT usable 32.18 MB [LVM: 133 KB]
PV#                   4
PV Status             NOT available
Allocatable           yes (but full)
Cur LV                1
PE Size (KByte)       32768
Total PE              2383
Free PE               0
Allocated PE          2383
PV UUID               B6eh7L-kvSq-aiOg-aYxM-Cn6t-d5yA-ysvY1n

--- Physical volume ---

PV Name               /dev/hdb1
VG Name               main
PV Size               37.27 GB [78165297 secs] / NOT usable 32.18 MB [LVM: 128 KB]
PV#                   3
PV Status             NOT available
Allocatable           yes (but full)
Cur LV                1
PE Size (KByte)       32768
Total PE              1191
Free PE               0
Allocated PE          1191
PV UUID               qfTbN9-v2rh-jxrq-gbRj-V6hs-H7CJ-RkuuJU

--- Volume group ---
VG Name

VG Access             read/write
VG Status             NOT available/resizable
VG #                  0
MAX LV                255
Cur LV                4
Open LV               0
MAX LV Size           2 TB
Max PV                255
Cur PV                4
Act PV                4
VG Size               124.03 GB
PE Size               32 MB
Total PE              3969
Alloc PE / Size       3969 / 124.03 GB
Free  PE / Size       0 / 0
VG UUID               gAUFoR-WAoN-zftw-H0z5-pb1D-w4nK-dSAvvr

--- List of logical volumes ---

pvdata -- logical volume "/dev/main/lv_usr" at offset 0
pvdata -- logical volume "/dev/main/lv_home" at offset 1
pvdata -- logical volume "/dev/main/lv_tmp" at offset 2
pvdata -- logical volume "/dev/main/lv_var" at offset 3

pvdata -- logical volume struct at offset   4 is empty
pvdata -- logical volume struct at offset   5 is empty
pvdata -- logical volume struct at offset   6 is empty
pvdata -- logical volume struct at offset   7 is empty
pvdata -- logical volume struct at offset   8 is empty
pvdata -- logical volume struct at offset   9 is empty
pvdata -- logical volume struct at offset  10 is empty
pvdata -- logical volume struct at offset  11 is empty
pvdata -- logical volume struct at offset  12 is empty
pvdata -- logical volume struct at offset  13 is empty
pvdata -- logical volume struct at offset  14 is empty
pvdata -- logical volume struct at offset  15 is empty
pvdata -- logical volume struct at offset  16 is empty
pvdata -- logical volume struct at offset  17 is empty
pvdata -- logical volume struct at offset  18 is empty
pvdata -- logical volume struct at offset  19 is empty
pvdata -- logical volume struct at offset  20 is empty
pvdata -- logical volume struct at offset  21 is empty
pvdata -- logical volume struct at offset  22 is empty
pvdata -- logical volume struct at offset  23 is empty
pvdata -- logical volume struct at offset  24 is empty
pvdata -- logical volume struct at offset  25 is empty
pvdata -- logical volume struct at offset  26 is empty
pvdata -- logical volume struct at offset  27 is empty
pvdata -- logical volume struct at offset  28 is empty
pvdata -- logical volume struct at offset  29 is empty
pvdata -- logical volume struct at offset  30 is empty
pvdata -- logical volume struct at offset  31 is empty
pvdata -- logical volume struct at offset  32 is empty
pvdata -- logical volume struct at offset  33 is empty
pvdata -- logical volume struct at offset  34 is empty
pvdata -- logical volume struct at offset  35 is empty
pvdata -- logical volume struct at offset  36 is empty
pvdata -- logical volume struct at offset  37 is empty
pvdata -- logical volume struct at offset  38 is empty
pvdata -- logical volume struct at offset  39 is empty
pvdata -- logical volume struct at offset  40 is empty
pvdata -- logical volume struct at offset  41 is empty
pvdata -- logical volume struct at offset  42 is empty
pvdata -- logical volume struct at offset  43 is empty
pvdata -- logical volume struct at offset  44 is empty
pvdata -- logical volume struct at offset  45 is empty
pvdata -- logical volume struct at offset  46 is empty
pvdata -- logical volume struct at offset  47 is empty
pvdata -- logical volume struct at offset  48 is empty
pvdata -- logical volume struct at offset  49 is empty
pvdata -- logical volume struct at offset  50 is empty
pvdata -- logical volume struct at offset  51 is empty
pvdata -- logical volume struct at offset  52 is empty
pvdata -- logical volume struct at offset  53 is empty
pvdata -- logical volume struct at offset  54 is empty
pvdata -- logical volume struct at offset  55 is empty
pvdata -- logical volume struct at offset  56 is empty
pvdata -- logical volume struct at offset  57 is empty
pvdata -- logical volume struct at offset  58 is empty
pvdata -- logical volume struct at offset  59 is empty
pvdata -- logical volume struct at offset  60 is empty
pvdata -- logical volume struct at offset  61 is empty
pvdata -- logical volume struct at offset  62 is empty
pvdata -- logical volume struct at offset  63 is empty
pvdata -- logical volume struct at offset  64 is empty
pvdata -- logical volume struct at offset  65 is empty
pvdata -- logical volume struct at offset  66 is empty
pvdata -- logical volume struct at offset  67 is empty
pvdata -- logical volume struct at offset  68 is empty
pvdata -- logical volume struct at offset  69 is empty
pvdata -- logical volume struct at offset  70 is empty
pvdata -- logical volume struct at offset  71 is empty
pvdata -- logical volume struct at offset  72 is empty
pvdata -- logical volume struct at offset  73 is empty
pvdata -- logical volume struct at offset  74 is empty
pvdata -- logical volume struct at offset  75 is empty
pvdata -- logical volume struct at offset  76 is empty
pvdata -- logical volume struct at offset  77 is empty
pvdata -- logical volume struct at offset  78 is empty
pvdata -- logical volume struct at offset  79 is empty
pvdata -- logical volume struct at offset  80 is empty
pvdata -- logical volume struct at offset  81 is empty
pvdata -- logical volume struct at offset  82 is empty
pvdata -- logical volume struct at offset  83 is empty
pvdata -- logical volume struct at offset  84 is empty
pvdata -- logical volume struct at offset  85 is empty
pvdata -- logical volume struct at offset  86 is empty
pvdata -- logical volume struct at offset  87 is empty
pvdata -- logical volume struct at offset  88 is empty
pvdata -- logical volume struct at offset  89 is empty
pvdata -- logical volume struct at offset  90 is empty
pvdata -- logical volume struct at offset  91 is empty
pvdata -- logical volume struct at offset  92 is empty
pvdata -- logical volume struct at offset  93 is empty
pvdata -- logical volume struct at offset  94 is empty
pvdata -- logical volume struct at offset  95 is empty
pvdata -- logical volume struct at offset  96 is empty
pvdata -- logical volume struct at offset  97 is empty
pvdata -- logical volume struct at offset  98 is empty
pvdata -- logical volume struct at offset  99 is empty

pvdata -- logical volume struct at offset 100 is empty pvdata -- logical volume struct at offset 101 is empty pvdata -- logical volume struct at offset 102 is empty pvdata -- logical volume struct at offset 103 is empty pvdata -- logical volume struct at offset 104 is empty pvdata -- logical volume struct at offset 105 is empty pvdata -- logical volume struct at offset 106 is empty pvdata -- logical volume struct at offset 107 is empty pvdata -- logical volume struct at offset 108 is empty pvdata -- logical volume struct at offset 109 is empty pvdata -- logical volume struct at offset 110 is empty pvdata -- logical volume struct at offset 111 is empty pvdata -- logical volume struct at offset 112 is empty pvdata -- logical volume struct at offset 113 is empty pvdata -- logical volume struct at offset 114 is empty pvdata -- logical volume struct at offset 115 is empty pvdata -- logical volume struct at offset 116 is empty pvdata -- logical volume struct at offset 117 is empty pvdata -- logical volume struct at offset 118 is empty pvdata -- logical volume struct at offset 119 is empty pvdata -- logical volume struct at offset 120 is empty pvdata -- logical volume struct at offset 121 is empty pvdata -- logical volume struct at offset 122 is empty pvdata -- logical volume struct at offset 123 is empty pvdata -- logical volume struct at offset 124 is empty pvdata -- logical volume struct at offset 125 is empty pvdata -- logical volume struct at offset 126 is empty pvdata -- logical volume struct at offset 127 is empty pvdata -- logical volume struct at offset 128 is empty pvdata -- logical volume struct at offset 129 is empty pvdata -- logical volume struct at offset 130 is empty pvdata -- logical volume struct at offset 131 is empty pvdata -- logical volume struct at offset 132 is empty pvdata -- logical volume struct at offset 133 is empty pvdata -- logical volume struct at offset 134 is empty pvdata -- logical volume struct at offset 135 is empty pvdata -- logical volume struct at offset 136 is empty pvdata -- logical volume struct at offset 137 is empty pvdata -- logical volume struct at offset 138 is empty pvdata -- logical volume struct at offset 139 is empty pvdata -- logical volume struct at offset 140 is empty pvdata -- logical volume struct at offset 141 is empty pvdata -- logical volume struct at offset 142 is empty pvdata -- logical volume struct at offset 143 is empty pvdata -- logical volume struct at offset 144 is empty pvdata -- logical volume struct at offset 145 is empty pvdata -- logical volume struct at offset 146 is empty pvdata -- logical volume struct at offset 147 is empty pvdata -- logical volume struct at offset 148 is empty pvdata -- logical volume struct at offset 149 is empty pvdata -- logical volume struct at offset 150 is empty pvdata -- logical volume struct at offset 151 is empty pvdata -- logical volume struct at offset 152 is empty pvdata -- logical volume struct at offset 153 is empty pvdata -- logical volume struct at offset 154 is empty pvdata -- logical volume struct at offset 155 is empty pvdata -- logical volume struct at offset 156 is empty pvdata -- logical volume struct at offset 157 is empty pvdata -- logical volume struct at offset 158 is empty pvdata -- logical volume struct at offset 159 is empty pvdata -- logical volume struct at offset 160 is empty pvdata -- logical volume struct at offset 161 is empty pvdata -- logical volume struct at offset 162 is empty pvdata -- logical volume struct at offset 163 is empty pvdata -- logical volume struct at offset 164 is empty pvdata -- logical volume struct at offset 165 is empty pvdata -- logical volume struct at offset 166 is empty pvdata -- logical volume struct at offset 167 is empty pvdata -- logical volume struct at offset 168 is empty pvdata -- logical volume struct at offset 169 is empty pvdata -- logical volume struct at offset 170 is empty pvdata -- logical volume struct at offset 171 is empty pvdata -- logical volume struct at offset 172 is empty pvdata -- logical volume struct at offset 173 is empty pvdata -- logical volume struct at offset 174 is empty pvdata -- logical volume struct at offset 175 is empty pvdata -- logical volume struct at offset 176 is empty pvdata -- logical volume struct at offset 177 is empty pvdata -- logical volume struct at offset 178 is empty pvdata -- logical volume struct at offset 179 is empty pvdata -- logical volume struct at offset 180 is empty pvdata -- logical volume struct at offset 181 is empty pvdata -- logical volume struct at offset 182 is empty pvdata -- logical volume struct at offset 183 is empty pvdata -- logical volume struct at offset 184 is empty pvdata -- logical volume struct at offset 185 is empty pvdata -- logical volume struct at offset 186 is empty pvdata -- logical volume struct at offset 187 is empty pvdata -- logical volume struct at offset 188 is empty pvdata -- logical volume struct at offset 189 is empty pvdata -- logical volume struct at offset 190 is empty pvdata -- logical volume struct at offset 191 is empty pvdata -- logical volume struct at offset 192 is empty pvdata -- logical volume struct at offset 193 is empty pvdata -- logical volume struct at offset 194 is empty pvdata -- logical volume struct at offset 195 is empty pvdata -- logical volume struct at offset 196 is empty pvdata -- logical volume struct at offset 197 is empty pvdata -- logical volume struct at offset 198 is empty pvdata -- logical volume struct at offset 199 is empty pvdata -- logical volume struct at offset 200 is empty pvdata -- logical volume struct at offset 201 is empty pvdata -- logical volume struct at offset 202 is empty pvdata -- logical volume struct at offset 203 is empty pvdata -- logical volume struct at offset 204 is empty pvdata -- logical volume struct at offset 205 is empty pvdata -- logical volume struct at offset 206 is empty pvdata -- logical volume struct at offset 207 is empty pvdata -- logical volume struct at offset 208 is empty pvdata -- logical volume struct at offset 209 is empty pvdata -- logical volume struct at offset 210 is empty pvdata -- logical volume struct at offset 211 is empty pvdata -- logical volume struct at offset 212 is empty pvdata -- logical volume struct at offset 213 is empty pvdata -- logical volume struct at offset 214 is empty pvdata -- logical volume struct at offset 215 is empty pvdata -- logical volume struct at offset 216 is empty pvdata -- logical volume struct at offset 217 is empty pvdata -- logical volume struct at offset 218 is empty pvdata -- logical volume struct at offset 219 is empty pvdata -- logical volume struct at offset 220 is empty pvdata -- logical volume struct at offset 221 is empty pvdata -- logical volume struct at offset 222 is empty pvdata -- logical volume struct at offset 223 is empty pvdata -- logical volume struct at offset 224 is empty pvdata -- logical volume struct at offset 225 is empty pvdata -- logical volume struct at offset 226 is empty pvdata -- logical volume struct at offset 227 is empty pvdata -- logical volume struct at offset 228 is empty pvdata -- logical volume struct at offset 229 is empty pvdata -- logical volume struct at offset 230 is empty pvdata -- logical volume struct at offset 231 is empty pvdata -- logical volume struct at offset 232 is empty pvdata -- logical volume struct at offset 233 is empty pvdata -- logical volume struct at offset 234 is empty pvdata -- logical volume struct at offset 235 is empty pvdata -- logical volume struct at offset 236 is empty pvdata -- logical volume struct at offset 237 is empty pvdata -- logical volume struct at offset 238 is empty pvdata -- logical volume struct at offset 239 is empty pvdata -- logical volume struct at offset 240 is empty pvdata -- logical volume struct at offset 241 is empty pvdata -- logical volume struct at offset 242 is empty pvdata -- logical volume struct at offset 243 is empty pvdata -- logical volume struct at offset 244 is empty pvdata -- logical volume struct at offset 245 is empty pvdata -- logical volume struct at offset 246 is empty pvdata -- logical volume struct at offset 247 is empty pvdata -- logical volume struct at offset 248 is empty pvdata -- logical volume struct at offset 249 is empty pvdata -- logical volume struct at offset 250 is empty pvdata -- logical volume struct at offset 251 is empty pvdata -- logical volume struct at offset 252 is empty pvdata -- logical volume struct at offset 253 is empty pvdata -- logical volume struct at offset 254 is empty --- List of physical volume UUIDs ---

001: somhX2-hx5K-zyfL-B9Qj-hloN-CY37-RPIRn9 002: 39vmzn-njSN-UXXk-yWYv-h8yu-Xjh1-4Um32W 003: qfTbN9-v2rh-jxrq-gbRj-V6hs-H7CJ-RkuuJU 004: B6eh7L-kvSq-aiOg-aYxM-Cn6t-d5yA-ysvY1n

--- Physical volume ---

PV Name               /dev/hdc1
VG Name               main
PV Size               74.53 GB [156301425 secs] / NOT usable 32.18 MB [LVM: 133 KB]
PV#                   4
PV Status             NOT available
Allocatable           yes (but full)
Cur LV                1
PE Size (KByte)       32768
Total PE              2383
Free PE               0
Allocated PE          2383
PV UUID               B6eh7L-kvSq-aiOg-aYxM-Cn6t-d5yA-ysvY1n

--- Volume group ---
VG Name

VG Access             read/write
VG Status             NOT available/resizable
VG #                  0
MAX LV                255
Cur LV                4
Open LV               0
MAX LV Size           2 TB
Max PV                255
Cur PV                4
Act PV                4
VG Size               124.03 GB
PE Size               32 MB
Total PE              3969
Alloc PE / Size       3969 / 124.03 GB
Free  PE / Size       0 / 0
VG UUID               gAUFoR-WAoN-zftw-H0z5-pb1D-w4nK-dSAvvr

--- List of logical volumes ---

pvdata -- logical volume "/dev/main/lv_usr" at offset 0
pvdata -- logical volume "/dev/main/lv_home" at offset 1
pvdata -- logical volume "/dev/main/lv_tmp" at offset 2
pvdata -- logical volume "/dev/main/lv_var" at offset 3

pvdata -- logical volume struct at offset   4 is empty
pvdata -- logical volume struct at offset   5 is empty
pvdata -- logical volume struct at offset   6 is empty
pvdata -- logical volume struct at offset   7 is empty
pvdata -- logical volume struct at offset   8 is empty
pvdata -- logical volume struct at offset   9 is empty
pvdata -- logical volume struct at offset  10 is empty
pvdata -- logical volume struct at offset  11 is empty
pvdata -- logical volume struct at offset  12 is empty
pvdata -- logical volume struct at offset  13 is empty
pvdata -- logical volume struct at offset  14 is empty
pvdata -- logical volume struct at offset  15 is empty
pvdata -- logical volume struct at offset  16 is empty
pvdata -- logical volume struct at offset  17 is empty
pvdata -- logical volume struct at offset  18 is empty
pvdata -- logical volume struct at offset  19 is empty
pvdata -- logical volume struct at offset  20 is empty
pvdata -- logical volume struct at offset  21 is empty
pvdata -- logical volume struct at offset  22 is empty
pvdata -- logical volume struct at offset  23 is empty
pvdata -- logical volume struct at offset  24 is empty
pvdata -- logical volume struct at offset  25 is empty
pvdata -- logical volume struct at offset  26 is empty
pvdata -- logical volume struct at offset  27 is empty
pvdata -- logical volume struct at offset  28 is empty
pvdata -- logical volume struct at offset  29 is empty
pvdata -- logical volume struct at offset  30 is empty
pvdata -- logical volume struct at offset  31 is empty
pvdata -- logical volume struct at offset  32 is empty
pvdata -- logical volume struct at offset  33 is empty
pvdata -- logical volume struct at offset  34 is empty
pvdata -- logical volume struct at offset  35 is empty
pvdata -- logical volume struct at offset  36 is empty
pvdata -- logical volume struct at offset  37 is empty
pvdata -- logical volume struct at offset  38 is empty
pvdata -- logical volume struct at offset  39 is empty
pvdata -- logical volume struct at offset  40 is empty
pvdata -- logical volume struct at offset  41 is empty
pvdata -- logical volume struct at offset  42 is empty
pvdata -- logical volume struct at offset  43 is empty
pvdata -- logical volume struct at offset  44 is empty
pvdata -- logical volume struct at offset  45 is empty
pvdata -- logical volume struct at offset  46 is empty
pvdata -- logical volume struct at offset  47 is empty
pvdata -- logical volume struct at offset  48 is empty
pvdata -- logical volume struct at offset  49 is empty
pvdata -- logical volume struct at offset  50 is empty
pvdata -- logical volume struct at offset  51 is empty
pvdata -- logical volume struct at offset  52 is empty
pvdata -- logical volume struct at offset  53 is empty
pvdata -- logical volume struct at offset  54 is empty
pvdata -- logical volume struct at offset  55 is empty
pvdata -- logical volume struct at offset  56 is empty
pvdata -- logical volume struct at offset  57 is empty
pvdata -- logical volume struct at offset  58 is empty
pvdata -- logical volume struct at offset  59 is empty
pvdata -- logical volume struct at offset  60 is empty
pvdata -- logical volume struct at offset  61 is empty
pvdata -- logical volume struct at offset  62 is empty
pvdata -- logical volume struct at offset  63 is empty
pvdata -- logical volume struct at offset  64 is empty
pvdata -- logical volume struct at offset  65 is empty
pvdata -- logical volume struct at offset  66 is empty
pvdata -- logical volume struct at offset  67 is empty
pvdata -- logical volume struct at offset  68 is empty
pvdata -- logical volume struct at offset  69 is empty
pvdata -- logical volume struct at offset  70 is empty
pvdata -- logical volume struct at offset  71 is empty
pvdata -- logical volume struct at offset  72 is empty
pvdata -- logical volume struct at offset  73 is empty
pvdata -- logical volume struct at offset  74 is empty
pvdata -- logical volume struct at offset  75 is empty
pvdata -- logical volume struct at offset  76 is empty
pvdata -- logical volume struct at offset  77 is empty
pvdata -- logical volume struct at offset  78 is empty
pvdata -- logical volume struct at offset  79 is empty
pvdata -- logical volume struct at offset  80 is empty
pvdata -- logical volume struct at offset  81 is empty
pvdata -- logical volume struct at offset  82 is empty
pvdata -- logical volume struct at offset  83 is empty
pvdata -- logical volume struct at offset  84 is empty
pvdata -- logical volume struct at offset  85 is empty
pvdata -- logical volume struct at offset  86 is empty
pvdata -- logical volume struct at offset  87 is empty
pvdata -- logical volume struct at offset  88 is empty
pvdata -- logical volume struct at offset  89 is empty
pvdata -- logical volume struct at offset  90 is empty
pvdata -- logical volume struct at offset  91 is empty
pvdata -- logical volume struct at offset  92 is empty
pvdata -- logical volume struct at offset  93 is empty
pvdata -- logical volume struct at offset  94 is empty
pvdata -- logical volume struct at offset  95 is empty
pvdata -- logical volume struct at offset  96 is empty
pvdata -- logical volume struct at offset  97 is empty
pvdata -- logical volume struct at offset  98 is empty
pvdata -- logical volume struct at offset  99 is empty

pvdata -- logical volume struct at offset 100 is empty pvdata -- logical volume struct at offset 101 is empty pvdata -- logical volume struct at offset 102 is empty pvdata -- logical volume struct at offset 103 is empty pvdata -- logical volume struct at offset 104 is empty pvdata -- logical volume struct at offset 105 is empty pvdata -- logical volume struct at offset 106 is empty pvdata -- logical volume struct at offset 107 is empty pvdata -- logical volume struct at offset 108 is empty pvdata -- logical volume struct at offset 109 is empty pvdata -- logical volume struct at offset 110 is empty pvdata -- logical volume struct at offset 111 is empty pvdata -- logical volume struct at offset 112 is empty pvdata -- logical volume struct at offset 113 is empty pvdata -- logical volume struct at offset 114 is empty pvdata -- logical volume struct at offset 115 is empty pvdata -- logical volume struct at offset 116 is empty pvdata -- logical volume struct at offset 117 is empty pvdata -- logical volume struct at offset 118 is empty pvdata -- logical volume struct at offset 119 is empty pvdata -- logical volume struct at offset 120 is empty pvdata -- logical volume struct at offset 121 is empty pvdata -- logical volume struct at offset 122 is empty pvdata -- logical volume struct at offset 123 is empty pvdata -- logical volume struct at offset 124 is empty pvdata -- logical volume struct at offset 125 is empty pvdata -- logical volume struct at offset 126 is empty pvdata -- logical volume struct at offset 127 is empty pvdata -- logical volume struct at offset 128 is empty pvdata -- logical volume struct at offset 129 is empty pvdata -- logical volume struct at offset 130 is empty pvdata -- logical volume struct at offset 131 is empty pvdata -- logical volume struct at offset 132 is empty pvdata -- logical volume struct at offset 133 is empty pvdata -- logical volume struct at offset 134 is empty pvdata -- logical volume struct at offset 135 is empty pvdata -- logical volume struct at offset 136 is empty pvdata -- logical volume struct at offset 137 is empty pvdata -- logical volume struct at offset 138 is empty pvdata -- logical volume struct at offset 139 is empty pvdata -- logical volume struct at offset 140 is empty pvdata -- logical volume struct at offset 141 is empty pvdata -- logical volume struct at offset 142 is empty pvdata -- logical volume struct at offset 143 is empty pvdata -- logical volume struct at offset 144 is empty pvdata -- logical volume struct at offset 145 is empty pvdata -- logical volume struct at offset 146 is empty pvdata -- logical volume struct at offset 147 is empty pvdata -- logical volume struct at offset 148 is empty pvdata -- logical volume struct at offset 149 is empty pvdata -- logical volume struct at offset 150 is empty pvdata -- logical volume struct at offset 151 is empty pvdata -- logical volume struct at offset 152 is empty pvdata -- logical volume struct at offset 153 is empty pvdata -- logical volume struct at offset 154 is empty pvdata -- logical volume struct at offset 155 is empty pvdata -- logical volume struct at offset 156 is empty pvdata -- logical volume struct at offset 157 is empty pvdata -- logical volume struct at offset 158 is empty pvdata -- logical volume struct at offset 159 is empty pvdata -- logical volume struct at offset 160 is empty pvdata -- logical volume struct at offset 161 is empty pvdata -- logical volume struct at offset 162 is empty pvdata -- logical volume struct at offset 163 is empty pvdata -- logical volume struct at offset 164 is empty pvdata -- logical volume struct at offset 165 is empty pvdata -- logical volume struct at offset 166 is empty pvdata -- logical volume struct at offset 167 is empty pvdata -- logical volume struct at offset 168 is empty pvdata -- logical volume struct at offset 169 is empty pvdata -- logical volume struct at offset 170 is empty pvdata -- logical volume struct at offset 171 is empty pvdata -- logical volume struct at offset 172 is empty pvdata -- logical volume struct at offset 173 is empty pvdata -- logical volume struct at offset 174 is empty pvdata -- logical volume struct at offset 175 is empty pvdata -- logical volume struct at offset 176 is empty pvdata -- logical volume struct at offset 177 is empty pvdata -- logical volume struct at offset 178 is empty pvdata -- logical volume struct at offset 179 is empty pvdata -- logical volume struct at offset 180 is empty pvdata -- logical volume struct at offset 181 is empty pvdata -- logical volume struct at offset 182 is empty pvdata -- logical volume struct at offset 183 is empty pvdata -- logical volume struct at offset 184 is empty pvdata -- logical volume struct at offset 185 is empty pvdata -- logical volume struct at offset 186 is empty pvdata -- logical volume struct at offset 187 is empty pvdata -- logical volume struct at offset 188 is empty pvdata -- logical volume struct at offset 189 is empty pvdata -- logical volume struct at offset 190 is empty pvdata -- logical volume struct at offset 191 is empty pvdata -- logical volume struct at offset 192 is empty pvdata -- logical volume struct at offset 193 is empty pvdata -- logical volume struct at offset 194 is empty pvdata -- logical volume struct at offset 195 is empty pvdata -- logical volume struct at offset 196 is empty pvdata -- logical volume struct at offset 197 is empty pvdata -- logical volume struct at offset 198 is empty pvdata -- logical volume struct at offset 199 is empty pvdata -- logical volume struct at offset 200 is empty pvdata -- logical volume struct at offset 201 is empty pvdata -- logical volume struct at offset 202 is empty pvdata -- logical volume struct at offset 203 is empty pvdata -- logical volume struct at offset 204 is empty pvdata -- logical volume struct at offset 205 is empty pvdata -- logical volume struct at offset 206 is empty pvdata -- logical volume struct at offset 207 is empty pvdata -- logical volume struct at offset 208 is empty pvdata -- logical volume struct at offset 209 is empty pvdata -- logical volume struct at offset 210 is empty pvdata -- logical volume struct at offset 211 is empty pvdata -- logical volume struct at offset 212 is empty pvdata -- logical volume struct at offset 213 is empty pvdata -- logical volume struct at offset 214 is empty pvdata -- logical volume struct at offset 215 is empty pvdata -- logical volume struct at offset 216 is empty pvdata -- logical volume struct at offset 217 is empty pvdata -- logical volume struct at offset 218 is empty pvdata -- logical volume struct at offset 219 is empty pvdata -- logical volume struct at offset 220 is empty pvdata -- logical volume struct at offset 221 is empty pvdata -- logical volume struct at offset 222 is empty pvdata -- logical volume struct at offset 223 is empty pvdata -- logical volume struct at offset 224 is empty pvdata -- logical volume struct at offset 225 is empty pvdata -- logical volume struct at offset 226 is empty pvdata -- logical volume struct at offset 227 is empty pvdata -- logical volume struct at offset 228 is empty pvdata -- logical volume struct at offset 229 is empty pvdata -- logical volume struct at offset 230 is empty pvdata -- logical volume struct at offset 231 is empty pvdata -- logical volume struct at offset 232 is empty pvdata -- logical volume struct at offset 233 is empty pvdata -- logical volume struct at offset 234 is empty pvdata -- logical volume struct at offset 235 is empty pvdata -- logical volume struct at offset 236 is empty pvdata -- logical volume struct at offset 237 is empty pvdata -- logical volume struct at offset 238 is empty pvdata -- logical volume struct at offset 239 is empty pvdata -- logical volume struct at offset 240 is empty pvdata -- logical volume struct at offset 241 is empty pvdata -- logical volume struct at offset 242 is empty pvdata -- logical volume struct at offset 243 is empty pvdata -- logical volume struct at offset 244 is empty pvdata -- logical volume struct at offset 245 is empty pvdata -- logical volume struct at offset 246 is empty pvdata -- logical volume struct at offset 247 is empty pvdata -- logical volume struct at offset 248 is empty pvdata -- logical volume struct at offset 249 is empty pvdata -- logical volume struct at offset 250 is empty pvdata -- logical volume struct at offset 251 is empty pvdata -- logical volume struct at offset 252 is empty pvdata -- logical volume struct at offset 253 is empty pvdata -- logical volume struct at offset 254 is empty --- List of physical volume UUIDs ---

001: somhX2-hx5K-zyfL-B9Qj-hloN-CY37-RPIRn9 002: 39vmzn-njSN-UXXk-yWYv-h8yu-Xjh1-4Um32W 003: qfTbN9-v2rh-jxrq-gbRj-V6hs-H7CJ-RkuuJU 004: B6eh7L-kvSq-aiOg-aYxM-Cn6t-d5yA-ysvY1n

LVM1 can't retrieve data from a VG with a crashed PV (That's what your backups are for).

LVM2 can if you active the VG with the -P (--partial) flag. LVM2 can read LVM2 metadata.

patrick

This system was on a Slackware 8.0, with a 2.4.18 kernel and LVM compiled by myself (can't remember the version).

I'm gonna take a look a this.
Thanks.

-=( manu )=-

I meant, of course, that LVM2 can read LVM1 metadata :-)

Don't forget, you'll need the "device-mapper" kernel patches too. They work best with 2.4.19 kernels, there were VM problems with 2.4.18 ones.

patrick

I played a bit with that, and it looks like when device-mapper can't access a zone it returns zeros.
What I did, is to create an LV over 4 or 5 partitions, format it, zeroed the first partition, do a 'vgscan -P' and try to read the block device (LV raw data). I supposed that this is the device-mapper that hide the missing informations by returning zeros. Is there a way to know (via ioctl for example) that a data is not available ? For my program, I need to know, what is readable and what is not readable.

I will also try evms, as E.Tews sugested.

Thanks

-=( manu )=-

PS: I do not have backup of my data because this is personal data (at home) and I thought it could be useful, as well as fun, to write this tool.
PPS: I first named this tool e2forensic, but my english isn't so good so could someone tell me if it make sense ?
PPPS: thank you for reading the message until there :o)

Do you think the LV_BMAP ioctl command could tell me if a block is available or not into the LV ? Its purpose is to give the sector number and the drive of a logical block, isn't it ?

What I want from the LVM is to tell me if data returned by a read command can be trusted. If it returns me a lot of zeros is it because the block is not available or because the block effectivly contains zeros.

Thanks a lot.

-=( manu )=-

We don't support zeroing of the data in the error case so far and do return an io error to the application. Later we plan to as an option.

So today you get a read error if the block is not available and the data is not zeroed in memory. No need to (ab)use LV_BMAP.

If your application needs to distinguish those cases anyways, you would want to stay with 'io error returned'.

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
[email protected]                           +49 2626 141200
                                                       FAX 924446
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Ok it works as I expected.
The error was coming from the fact that _I_ zeroed the partition to let the LVM utilties think that the PV isn't here. So the data returned was effectively coming from the partition. Instead I delete the partition, reboot and retest.

Thanks for taking time to answer.

-=( manu )=-