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snapshot problem

linux-lvm Heinz Mauelshagen 1 participant 1 message Apr 3, 2000 1 message not in the archive

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Heinz Mauelshagen

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Quoted 10 lines

Hi,

I am having trouble mounting a snapshot after rebooting.

I have no problem taking a snapshot and then mounting it. That seems to work ok. However, when I reboot the machine, the snapshot will no longer mount. I get the following message:

Quoted 6 lines
    # mount /dev/vg0/snap1 /snap1
    mount: block device /dev/vg0/snap1 is write-protected, mounting
read-only
    mount: you must specify the filesystem type

Is this a bug or am I missing something?

Sorry, at this point in time snapshots are not persistent.
IOW: they don't survive reboots or VG deactivation/activation cycles.

Persistency will be implemented in one of the next releases.

Quoted 8 lines

Also, I have had the system lockup during a copy of the snapshot files. This has happened to me several times; however, I don't know how to report any other diagnostic info. Basically though I delete the original files and then try to restore them from the snapshot. It crashed twice and worked once. I don't know how to replicate the problem.

Actually there is some trouble caused by changes in rawio in recent kernels.

Hope, that we can soon fix them.

Heinz

Quoted 36 lines

Thanks!

Jeff

My sys info is:

Linux jmast 2.3.99-pre3 #10 Mon Apr 3 14:11:10 MDT 2000 i686 unknown
* lvm pre1 patch installed
* reiserfs pre3 patch installed

pvscan -- reading all physical volumes (this may take a while...)

pvscan -- ACTIVE   PV "/dev/sdb1" of VG "vg0" [1.01 GB / 172 MB free]
pvscan -- ACTIVE   PV "/dev/sdb2" of VG "vg1" [1 GB / 564 MB free]
pvscan -- ACTIVE   PV "/dev/sdc1" of VG "vg0" [1.01 GB / 672 MB free]
pvscan -- ACTIVE   PV "/dev/sdc2" of VG "vg1" [1 GB / 664 MB free]

pvscan -- total: 4 [4.03 GB] / in use: 4 [4.03 GB] / in no VG: 0 [0]

--- Volume group ---

VG Name               vg0
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                2
Open LV               1
MAX LV Size           255.99 GB
Max PV                256
Cur PV                2
Act PV                2
VG Size               2.02 GB
PE Size               4 MB
Total PE              516
Alloc PE / Size       305 / 1.19 GB
Free  PE / Size       211 / 844 MB
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Systemmanagement TS                              T-Nova
                                                 Entwicklungszentrum Darmstadt
Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
Senior Systems Engineer                          Postfach 10 05 41
                                                 64205 Darmstadt
[email protected]                      Germany
                                                 +49 6151 886-425
                                                          FAX-386
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