Power-up-in-standby Hitachi 5K3000 fails with either sata_sil24 or pmp, but not direct to AHCI controllers

Hi,

I'm building a storage server with a number of 2TB Hitachi "5K3000" 5900rpm drives. The drives support power up in standby, and I'd like to make use of this so that I can use a smaller (and thus more efficient) power supply in the system (each drive is speced at 4.4 watts idle, but 32 watts max startup power - I haven't taken peak current draw when busy yet, but I'm guessing it'll end up at less than half of 32 watts per drive...).

The drives work with power-up-in-standby with the AHCI driver (Intel H67 SATA2 and SATA3 ports, as well as Marvel 88SE9123 SATA3) - however there do seem to be quite a few hard link resets...

The drives fail to appear at all when connected to either Silicon Image 3132 controllers, 3124 controllers, or any controller when used with a Silicon Image 3726 port multiplier. I haven't been able to test with any other drive models yet.

Some dmesg extracts when hot-plugging the drives (all with Debian's 2.6.38 kernel) follow:

Intel AHCI direct-attached:

1220.664341] ata11: exception Emask 0x10 SAct 0x0 SErr 0x4040000 action 0xe frozen 1220.664572] ata11: irq_stat 0x00000040, connection status changed
1220.664734] ata11: SError: { CommWake DevExch }
1220.664887] ata11: hard resetting link
1221.557691] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
1226.556112] ata11.00: qc timeout (cmd 0xef)
1226.556277] ata11.00: failed to IDENTIFY (SPINUP failed, err_mask=0x4)
1226.556445] ata11: hard resetting link
1231.638339] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
1231.640024] ata11.00: ATA-8: Hitachi HDS5C3020ALA632, ML6OA580, max UDMA/133 1231.640206] ata11.00: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA 1231.642049] ata11.00: configured for UDMA/133
1231.642215] ata11: EH complete
1231.642436] scsi 10:0:0:0: Direct-Access ATA Hitachi HDS5C302 ML6O PQ: 0 ANSI: 5
1231.643337] sd 10:0:0:0: [sdd] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) 1231.643462] sd 10:0:0:0: [sdd] Write Protect is off
1231.643468] sd 10:0:0:0: [sdd] Mode Sense: 00 3a 00 00
1231.643524] sd 10:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA 1231.668042] sdd: unknown partition table
1231.668377] sd 10:0:0:0: [sdd] Attached SCSI disk

Same for Marvel 9123 AHCI direct-attached:

1404.848982] ata18: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xe frozen 1404.849216] ata18: irq_stat 0x80400040, connection status changed
1404.849378] ata18: SError: { PHYRdyChg CommWake DevExch }
1404.849538] ata18: hard resetting link
1405.744394] ata18: SATA link up 6.0 Gbps (SStatus 133 SControl 370)
1410.742706] ata18.00: qc timeout (cmd 0xef)
1410.742874] ata18.00: failed to IDENTIFY (SPINUP failed, err_mask=0x4)
1410.743043] ata18: hard resetting link
1415.769067] ata18: SATA link up 6.0 Gbps (SStatus 133 SControl 370)
1415.770782] ata18.00: ATA-8: Hitachi HDS5C3020ALA632, ML6OA580, max UDMA/133 1415.770968] ata18.00: 3907029168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA 1415.772799] ata18.00: configured for UDMA/133
1415.772963] ata18: EH complete
1415.773184] scsi 17:0:0:0: Direct-Access ATA Hitachi HDS5C302 ML6O PQ: 0 ANSI: 5
1415.773911] sd 17:0:0:0: [sdd] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) 1415.774030] sd 17:0:0:0: [sdd] Write Protect is off
1415.774033] sd 17:0:0:0: [sdd] Mode Sense: 00 3a 00 00
1415.774115] sd 17:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA 1415.796796] sdd: unknown partition table
1415.797143] sd 17:0:0:0: [sdd] Attached SCSI disk

Same for Silicon Image 3124:

1588.754223] ata5: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe frozen 1588.754408] ata5: irq_stat 0x00b40090, PHY RDY changed
1588.754565] ata5: hard resetting link
1590.950794] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 0) 1595.949092] ata5.00: qc timeout (cmd 0xef)
1595.964485] ata5.00: failed to IDENTIFY (SPINUP failed, err_mask=0x4) 1595.964657] ata5: hard resetting link
1600.863497] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 0) 1605.861974] ata5.00: qc timeout (cmd 0xec)
1605.862143] ata5.00: failed to IDENTIFY (I/O error, err_mask=0x4) 1605.862310] ata5: limiting SATA link speed to 1.5 Gbps
1605.862468] ata5: hard resetting link
1615.866464] ata5: softreset failed (timeout)
1615.866626] ata5: hard resetting link
1625.871134] ata5: softreset failed (timeout)
1625.871297] ata5: hard resetting link
1660.859489] ata5: softreset failed (timeout)
1660.859648] ata5: hard resetting link
1665.857825] ata5: softreset failed (timeout)
1665.857988] ata5: reset failed, giving up
1665.858151] ata5: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xe frozen t4 1665.858378] ata5: SError: { PHYRdyChg CommWake DevExch }
1665.858540] ata5: hard resetting link
1675.862496] ata5: softreset failed (timeout)
1675.862660] ata5: hard resetting link
1685.867165] ata5: softreset failed (timeout)
1685.867332] ata5: hard resetting link
1720.855520] ata5: softreset failed (timeout)
1720.855685] ata5: limiting SATA link speed to 1.5 Gbps
1720.855840] ata5: hard resetting link
1725.853857] ata5: softreset failed (timeout)
1725.854020] ata5: reset failed, giving up
1725.854172] ata5: EH complete

... if I then didn't power down the drive, but instead attached it to the Marvell controller, it didn't come back, so I'd guess the interaction with the 3124 has wedged the drive permanently.

1767.839737] ata16: exception Emask 0x10 SAct 0x0 SErr 0x4000000 action 0xe frozen 1767.839987] ata16: irq_stat 0x80000040, connection status changed 1767.840154] ata16: SError: { DevExch }
1767.840310] ata16: hard resetting link
1777.860539] ata16: softreset failed (device not ready)
1777.860712] ata16: hard resetting link
1787.881203] ata16: softreset failed (device not ready)
1787.881370] ata16: hard resetting link
1798.853551] ata16: link is slow to respond, please be patient (ready=0) 1822.925540] ata16: softreset failed (device not ready)
1822.925713] ata16: limiting SATA link speed to 3.0 Gbps
1822.925871] ata16: hard resetting link
1828.123801] ata16: softreset failed (device not ready)
1828.123963] ata16: reset failed, giving up
1828.124110] ata16: EH complete

I then power-cycled the drive and attached it to the Intel H67 with Silicon Image 3726:

1918.840790] ata8.04: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xf 1918.840964] ata8.04: SError: { PHYRdyChg CommWake DevExch } 1918.841179] ata8.04: hard resetting link
1919.561559] ata8.04: SATA link up 3.0 Gbps (SStatus 123 SControl 320) 1924.559728] ata8.04: qc timeout (cmd 0xef)
1924.559900] ata8.04: failed to IDENTIFY (SPINUP failed, err_mask=0x4) 1924.560070] ata8.15: hard resetting link
1925.331456] ata8.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1925.331867] ata8.00: hard resetting link
1925.651543] ata8.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320) 1925.651736] ata8.01: hard resetting link
1925.971437] ata8.01: SATA link down (SStatus 0 SControl 320) 1925.971632] ata8.02: hard resetting link
1926.291329] ata8.02: SATA link down (SStatus 0 SControl 320) 1926.291530] ata8.03: hard resetting link
1926.611227] ata8.03: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1926.611416] ata8.04: hard resetting link
1926.931121] ata8.04: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1926.931292] ata8.05: hard resetting link
1927.251013] ata8.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 1927.349262] ata8.00: configured for UDMA/133
1927.351871] ata8.03: configured for UDMA/133
1927.352041] ata8.04: failed to IDENTIFY (I/O error, err_mask=0x100) 1927.352204] ata8.15: hard resetting link
1928.122528] ata8.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1928.122887] ata8.00: hard resetting link
1928.442601] ata8.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320) 1928.442780] ata8.01: hard resetting linkutilise
1928.762495] ata8.01: SATA link down (SStatus 0 SControl 320) 1928.762683] ata8.02: hard resetting link
1929.082419] ata8.02: SATA link down (SStatus 0 SControl 320) 1929.082621] ata8.03: hard resetting link
1929.402296] ata8.03: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1931.929261] ata8.04: hard resetting link
1932.249355] ata8.04: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1932.249543] ata8.05: hard resetting link
1932.569276] ata8.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 1932.669961] ata8.00: configured for UDMA/133
1932.672764] ata8.03: configured for UDMA/133
1932.672940] ata8.04: failed to IDENTIFY (I/O error, err_mask=0x100) 1932.673114] ata8.04: failed to recover link after 3 tries, disabling 1932.673283] ata8.15: hard resetting link
1933.444764] ata8.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1933.764736] ata8.00: hard resetting link
1934.084728] ata8.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320) 1934.084908] ata8.01: hard resetting link
1934.404621] ata8.01: SATA link down (SStatus 0 SControl 320) 1934.404809] ata8.02: hard resetting link
1934.724515] ata8.02: SATA link down (SStatus 0 SControl 320) 1934.724699] ata8.03: hard resetting link
1935.044419] ata8.03: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1937.567385] ata8.05: hard resetting link
1937.887472] ata8.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 1937.990659] ata8.00: configured for UDMA/133
1937.993318] ata8.03: configured for UDMA/133
1937.993509] ata8: EH complete

Any ideas? My initial thought is perhaps the drive gets a reset whilst it was loading it's microcode or something, and then doesn't recover from that?

Cheers,

Tim.

South East Open Source Solutions Limited
Registered in England and Wales with company number 06134732.  
Registered Office: 2 Powell Gardens, Redhill, Surrey, RH1 1TQ
VAT number: 900 6633 53  http://seoss.co.uk/ +44-(0)1273-808309

Hello,

Heh, that's interesting. The feature isn't very well tested and it wouldn't be too surprising if there are some bugs on all sides (driver, controller and drive firmware). Can you please try with a drive from a different vendor and see whether it fares any differently?

Thanks.

tejun

OK, I'll see what I can get hold of in the way drives which support that feature...

Cheers,

Tim.

South East Open Source Solutions Limited
Registered in England and Wales with company number 06134732.  
Registered Office: 2 Powell Gardens, Redhill, Surrey, RH1 1TQ
VAT number: 900 6633 53  http://seoss.co.uk/ +44-(0)1273-808309

All tests with a Silicon Image port multiplier, plugged into the Intel H67 motherboard SATA port...

I tried with a WD drive:

1783.276989] ata11.02: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xf
1783.277165] ata11.02: SError: { PHYRdyChg CommWake DevExch } 1783.277359] ata11.02: hard resetting link
1784.001050] ata11.02: SATA link up 3.0 Gbps (SStatus 123 SControl 320) 1788.999212] ata11.02: qc timeout (cmd 0xef)
1788.999375] ata11.02: failed to IDENTIFY (SPINUP failed, err_mask=0x4) 1788.999539] ata11.15: hard resetting link
1794.529376] ata11.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1794.529709] ata11.00: hard resetting link
1794.849450] ata11.00: SATA link down (SStatus 0 SControl 320) 1794.849642] ata11.01: hard resetting link
1795.169358] ata11.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1795.169538] ata11.02: hard resetting link
1795.489250] ata11.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 1795.489439] ata11.03: hard resetting link
1795.809146] ata11.03: SATA link down (SStatus 0 SControl 320) 1795.809347] ata11.04: hard resetting link
1796.129047] ata11.04: SATA link down (SStatus 0 SControl 320) 1796.129232] ata11.05: hard resetting link
1796.448936] ata11.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 1796.545496] ata11.01: configured for UDMA/133
1796.556856] ata11.02: ATA-8: WDC WD5000AAKS-22YGA0, 12.01C02, max UDMA/133 1796.557038] ata11.02: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
1796.558414] ata11.02: configured for UDMA/133
1796.558760] ata11: EH complete
1796.559020] scsi 10:2:0:0: Direct-Access ATA WDC WD5000AAKS-2
12.0 PQ: 0 ANSI: 5
1796.559453] sd 10:2:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
1796.559726] sd 10:2:0:0: [sdb] Write Protect is off 1796.559886] sd 10:2:0:0: [sdb] Mode Sense: 00 3a 00 00 1796.559910] sd 10:2:0:0: [sdb] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
1796.590194] sdb: sdb1 sdb2 sdb4 < sdb5 sdb6 >
1796.590690] sd 10:2:0:0: [sdb] Attached SCSI disk

... looks OK - then I added in a different WD (few-year-old Hitachi Ultrastar "enterprise" 1TB drive):

3221.187324] ata10.03: exception Emask 0x10 SAct 0x0 SErr 0x4050000 action 0xf
3221.187495] ata10.03: SError: { PHYRdyChg CommWake DevExch } 3221.187690] ata10.03: hard resetting link
3221.908208] ata10.03: SATA link up 3.0 Gbps (SStatus 123 SControl 320) 3221.908405] ata10.03: failed to IDENTIFY (I/O error, err_mask=0x100) 3221.908580] ata10.15: hard resetting link
3227.438189] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3227.438596] ata10.00: hard resetting link
3227.758285] ata10.00: SATA link down (SStatus 0 SControl 310) 3227.758481] ata10.01: hard resetting link
3228.078174] ata10.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3228.078363] ata10.02: hard resetting link
3228.398069] ata10.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3228.398249] ata10.03: hard resetting link
3228.717949] ata10.03: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3228.718129] ata10.04: hard resetting link
3229.037845] ata10.04: SATA link down (SStatus 0 SControl 320) 3229.053513] ata10.05: hard resetting link
3229.373739] ata10.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 3229.471776] ata10.01: configured for UDMA/133
3229.485021] ata10.02: configured for UDMA/133
3234.479859] ata10.03: qc timeout (cmd 0xef)
3234.480019] ata10.03: failed to IDENTIFY (SPINUP failed, err_mask=0x4) 3234.480182] ata10.15: hard resetting link
3240.010031] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3240.010404] ata10.00: hard resetting link
3240.330128] ata10.00: SATA link down (SStatus 0 SControl 310) 3240.330334] ata10.01: hard resetting link
3240.650005] ata10.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3240.650190] ata10.02: hard resetting link
3240.969924] ata10.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3240.970105] ata10.03: hard resetting link
3241.289820] ata10.03: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3241.289997] ata10.05: hard resetting link
3241.609677] ata10.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 3241.711873] ata10.01: configured for UDMA/133
3241.728940] ata10.02: configured for UDMA/133
3241.729112] ata10.03: failed to IDENTIFY (I/O error, err_mask=0x100) 3241.729270] ata10.03: failed to recover link after 3 tries, disabling 3241.729437] ata10.15: hard resetting link
3247.259626] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3247.579625] ata10.00: hard resetting link
3247.899626] ata10.00: SATA link down (SStatus 0 SControl 310) 3247.899826] ata10.01: hard resetting link
3248.219520] ata10.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3248.219701] ata10.02: hard resetting link
3248.539376] ata10.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3248.539553] ata10.04: hard resetting link
3248.859283] ata10.04: SATA link down (SStatus 0 SControl 320) 3248.859486] ata10.05: hard resetting link
3249.179167] ata10.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 3249.280756] ata10.01: configured for UDMA/133
3249.294319] ata10.02: configured for UDMA/133
3249.611012] ata10: EH complete
3250.388324] ata10.00: failed to read SCR 1 (Emask=0x40) 3250.388490] ata10.01: failed to read SCR 1 (Emask=0x40) 3250.388644] ata10.02: failed to read SCR 1 (Emask=0x40) 3250.388800] ata10.03: failed to read SCR 1 (Emask=0x40) 3250.388955] ata10.04: failed to read SCR 1 (Emask=0x40) 3250.389112] ata10.05: failed to read SCR 1 (Emask=0x40) 3250.389274] ata10.15: exception Emask 0x2 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.389447] ata10.15: irq_stat 0x00800000, incorrect PMP 3250.389608] ata10.00: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.389842] ata10.01: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.390072] ata10.02: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.390300] ata10.03: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.390525] ata10.04: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.390763] ata10.05: exception Emask 0x100 SAct 0x0 SErr 0x0 action 0x6 frozen
3250.390993] ata10.15: hard resetting link
3255.920751] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3256.240698] ata10.03: failed to write SCR 1 (Emask=0x100) 3256.240862] ata10.03: COMRESET failed (errno=-5) 3256.241021] ata10.03: failed to write SCR 1 (Emask=0x40) 3256.241182] ata10.03: failed to clear SError.N (errno=-5) 3256.241341] ata10.15: hard resetting link
3261.770807] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3262.090762] ata10.03: failed to write SCR 1 (Emask=0x100) 3262.090922] ata10.03: COMRESET failed (errno=-5) 3262.091076] ata10.03: failed to write SCR 1 (Emask=0x40) 3262.091236] ata10.03: failed to clear SError.N (errno=-5) 3262.091397] ata10.15: hard resetting link
3267.620864] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3267.940817] ata10.03: failed to write SCR 1 (Emask=0x100) 3267.956355] ata10.03: COMRESET failed (errno=-5) 3267.956511] ata10.03: failed to write SCR 1 (Emask=0x40) 3267.956669] ata10.03: failed to clear SError.N (errno=-5) 3267.956672] ata10.15: hard resetting link
3273.482932] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3273.802873] ata10.03: failed to write SCR 1 (Emask=0x100) 3273.803037] ata10.03: COMRESET failed (errno=-5) 3273.803190] ata10.03: failed to write SCR 1 (Emask=0x40) 3273.803348] ata10.03: failed to clear SError.N (errno=-5) 3273.803507] ata10.15: hard resetting link
3279.332984] ata10.15: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3279.652933] ata10.03: failed to write SCR 1 (Emask=0x100) 3279.653097] ata10.03: COMRESET failed (errno=-5) 3279.653255] ata10.03: failed to write SCR 1 (Emask=0x40) 3279.653411] ata10.03: failed to clear SError.N (errno=-5) 3279.653569] ata10: failed to recover PMP after 5 tries, giving up 3279.653729] ata10.15: Port Multiplier detaching 3279.653884] ata10.01: disabled
3279.654024] ata10.02: disabled
3279.654185] ata10.00: disabled
3279.654335] ata10: exception Emask 0x2 SAct 0x0 SErr 0x0 action 0x6 frozen t4
3279.654507] ata10: irq_stat 0x00800001, incorrect PMP 3279.654666] ata10: hard resetting link
3285.183040] ata10: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3285.183223] ata10: EH complete
3285.183371] ata10.01: detaching (SCSI 9:1:0:0)
3285.207124] sd 9:1:0:0: [sdb] Synchronizing SCSI cache 3285.207304] sd 9:1:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
3285.207599] sd 9:1:0:0: [sdb] Stopping disk
3285.207754] sd 9:1:0:0: [sdb] START_STOP FAILED 3285.207908] sd 9:1:0:0: [sdb] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
3285.208233] ata10.02: detaching (SCSI 9:2:0:0)
3285.223124] sd 9:2:0:0: [sdc] Synchronizing SCSI cache 3285.223313] sd 9:2:0:0: [sdc] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
3285.223614] sd 9:2:0:0: [sdc] Stopping disk
3285.223771] sd 9:2:0:0: [sdc] START_STOP FAILED 3285.223927] sd 9:2:0:0: [sdc] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK

... and then there were no drives visible the other side of the port multiplier at all - not so good....

Unplugging the port multiplier from the motherboard SATA port (a different port on this occasion, but I think the same thing happens if I pick the same one), and replugging it makes the disappeared drives reappear, along with the (now spun up) Hitachi:

3374.238416] ata10: exception Emask 0x10 SAct 0x0 SErr 0x4090000 action 0xe frozen
3374.238652] ata10: irq_stat 0x00400040, connection status changed 3374.238814] ata10: SError: { PHYRdyChg 10B8B DevExch } 3374.238972] ata10: hard resetting link
3374.961277] ata10: SATA link down (SStatus 0 SControl 300) 3374.961453] ata10: EH complete
3381.497602] ata11: exception Emask 0x10 SAct 0x0 SErr 0x4050002 action 0xe frozen
3381.497838] ata11: irq_stat 0x00400040, connection status changed 3381.498002] ata11: SError: { RecovComm PHYRdyChg CommWake DevExch } 3381.498172] ata11: hard resetting link
3387.429132] ata11: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3387.429520] ata11.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, feat 0x1/0x9
3387.429944] ata11.00: hard resetting link
3387.749226] ata11.00: SATA link down (SStatus 0 SControl 310) 3387.749427] ata11.01: hard resetting link
3388.069106] ata11.01: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3388.069287] ata11.02: hard resetting link
3388.389018] ata11.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3388.389195] ata11.03: hard resetting link
3388.708866] ata11.03: SATA link up 3.0 Gbps (SStatus 123 SControl 300) 3388.709047] ata11.04: hard resetting link
3389.028796] ata11.04: SATA link down (SStatus 0 SControl 320) 3389.028996] ata11.05: hard resetting link
3389.348681] ata11.05: SATA link up 1.5 Gbps (SStatus 113 SControl 320) 3389.384254] ata11.01: ATA-7: ST3500641AS, 3.AAD, max UDMA/133 3389.384428] ata11.01: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32) 3389.450869] ata11.01: configured for UDMA/133
3389.467745] ata11.02: ATA-8: WDC WD5000AAKS-22YGA0, 12.01C02, max UDMA/133 3389.467916] ata11.02: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
3389.469215] ata11.02: configured for UDMA/133
3389.478644] ata11.03: ATA-7: Hitachi HUA721010KLA330, GKAOAB0A, max UDMA/133
3389.478818] ata11.03: 1953525168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
3389.480158] ata11.03: configured for UDMA/133
3389.480508] ata11: EH complete
3389.480702] scsi 10:1:0:0: Direct-Access ATA ST3500641AS
3.AA PQ: 0 ANSI: 5
3389.480831] sd 10:1:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB)
3389.480878] sd 10:1:0:0: [sdb] Write Protect is off 3389.480881] sd 10:1:0:0: [sdb] Mode Sense: 00 3a 00 00 3389.480903] sd 10:1:0:0: [sdb] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
3389.481290] scsi 10:2:0:0: Direct-Access ATA WDC WD5000AAKS-2
12.0 PQ: 0 ANSI: 5
3389.481453] sd 10:2:0:0: [sdc] 976773168 512-byte logical blocks: (500 GB/465 GiB)
3389.481503] sd 10:2:0:0: [sdc] Write Protect is off 3389.481506] sd 10:2:0:0: [sdc] Mode Sense: 00 3a 00 00 3389.481526] sd 10:2:0:0: [sdc] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
3389.481532] scsi 10:3:0:0: Direct-Access ATA Hitachi HUA72101
GKAO PQ: 0 ANSI: 5
3389.499135] sdb: sdb1
3389.499412] sd 10:3:0:0: [sdd] 1953525168 512-byte logical blocks:
(1.00 TB/931 GiB)
3389.499618] sd 10:1:0:0: [sdb] Attached SCSI disk
3389.499834] sd 10:3:0:0: [sdd] Write Protect is off 3389.499987] sd 10:3:0:0: [sdd] Mode Sense: 00 3a 00 00 3389.500007] sd 10:3:0:0: [sdd] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
3389.542656] sdc: sdc1 sdc2 sdc4 < sdc5 sdc6 >
3389.557103] sdd: sdd1 sdd2 < sdd5 >
3389.574742] sd 10:2:0:0: [sdc] Attached SCSI disk
3389.574789] sd 10:3:0:0: [sdd] Attached SCSI disk

Is this any use? Lots of other permutations for me to try out - I'll try and get some time to do that tomorrow.

Tim.

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