[Bug 12519] Re: Removing modular bay drive causes system freeze

[Noel J. Bergman]

Since the only message that appears anywhere with respect to the hotswap
bay is:

    ata4: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xa frozen
    ata4: ACPI event

on the console (not the logs), I thought that the following might have
some value.  I had attached an eSATA drive on a SiiG eSATA ExpressCard.
When I powered off the drive (it was not mounted), the following
appeared in kern.log:

  Mar 15 11:27:35 noel-hardy kernel: [   94.930433] ata2: exception Emask 0x10 SAct 0x0 SErr 0x80000 action 0xa frozen
  Mar 15 11:27:35 noel-hardy kernel: [   94.930445] ata2: irq_stat 0x01140010, PHY RDY changed
  Mar 15 11:27:35 noel-hardy kernel: [   94.930450] ata2: SError: { 10B8B }
  Mar 15 11:27:35 noel-hardy kernel: [   94.930468] ata2: hard resetting link
  Mar 15 11:27:37 noel-hardy kernel: [   95.148572] ata2: SATA link down (SStatus 0 SControl 0)
  Mar 15 11:27:37 noel-hardy kernel: [   95.148591] ata2: failed to recover some devices, retrying in 5 secs
  Mar 15 11:27:42 noel-hardy kernel: [   95.514751] ata2: hard resetting link
  Mar 15 11:27:44 noel-hardy kernel: [   95.758041] ata2: SATA link down (SStatus 0 SControl 0)
  Mar 15 11:27:44 noel-hardy kernel: [   95.758060] ata2: failed to recover some devices, retrying in 5 secs
  Mar 15 11:27:49 noel-hardy kernel: [   96.099245] ata2: hard resetting link
  Mar 15 11:27:51 noel-hardy kernel: [   96.320802] ata2: SATA link down (SStatus 0 SControl 0)
  Mar 15 11:27:51 noel-hardy kernel: [   96.320821] ata2.00: disabled
  Mar 15 11:27:52 noel-hardy kernel: [   96.436877] ata2: EH complete
  Mar 15 11:27:52 noel-hardy kernel: [   96.436889] ata2.00: detaching (SCSI 1:0:0:0)
  Mar 15 11:27:52 noel-hardy kernel: [   96.437129] sd 1:0:0:0: [sda] Synchronizing SCSI cache
  Mar 15 11:27:52 noel-hardy kernel: [   96.437159] sd 1:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK
  Mar 15 11:27:52 noel-hardy kernel: [   96.437163] sd 1:0:0:0: [sda] Stopping disk
  Mar 15 11:27:52 noel-hardy kernel: [   96.437168] sd 1:0:0:0: [sda] START_STOP FAILED
  Mar 15 11:27:52 noel-hardy kernel: [   96.437169] sd 1:0:0:0: [sda] Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK,SUGGEST_OK

and when powering the drive back on:

  Mar 15 11:36:23 noel-hardy kernel: [  169.535591] ata2: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xa frozen
  Mar 15 11:36:23 noel-hardy kernel: [  169.535602] ata2: irq_stat 0x00b40090, PHY RDY changed
  Mar 15 11:36:23 noel-hardy kernel: [  169.535621] ata2: hard resetting link
  Mar 15 11:36:33 noel-hardy kernel: [  170.463754] ata2: softreset failed (timeout)
  Mar 15 11:36:33 noel-hardy kernel: [  170.463767] ata2: hard resetting link
  Mar 15 11:36:41 noel-hardy kernel: [  171.101536] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
  Mar 15 11:36:41 noel-hardy kernel: [  171.102423] ata2.00: ATA-7: Hitachi HDS721010KLA330, GKAOA70M, max UDMA/133
  Mar 15 11:36:41 noel-hardy kernel: [  171.102433] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 31/32)
  Mar 15 11:36:41 noel-hardy kernel: [  171.103044] ata2.00: configured for UDMA/100
  Mar 15 11:36:41 noel-hardy kernel: [  171.103057] ata2: EH complete
  Mar 15 11:36:41 noel-hardy kernel: [  171.103440] scsi 1:0:0:0: Direct-Access     ATA      Hitachi HDS72101 GKAO PQ: 0 ANSI: 5
  Mar 15 11:36:41 noel-hardy kernel: [  171.103705] sd 1:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB)
  Mar 15 11:36:41 noel-hardy kernel: [  171.103835] sd 1:0:0:0: [sda] Write Protect is off
  Mar 15 11:36:41 noel-hardy kernel: [  171.103841] sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
  Mar 15 11:36:41 noel-hardy kernel: [  171.103879] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  Mar 15 11:36:41 noel-hardy kernel: [  171.103959] sd 1:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB)
  Mar 15 11:36:41 noel-hardy kernel: [  171.103979] sd 1:0:0:0: [sda] Write Protect is off
  Mar 15 11:36:41 noel-hardy kernel: [  171.103984] sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
  Mar 15 11:36:41 noel-hardy kernel: [  171.104020] sd 1:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  Mar 15 11:36:41 noel-hardy kernel: [  171.104028]  sda: sda1
  Mar 15 11:36:41 noel-hardy kernel: [  171.122023] sd 1:0:0:0: [sda] Attached SCSI disk
  Mar 15 11:36:41 noel-hardy kernel: [  171.122114] sd 1:0:0:0: Attached scsi generic sg0 type 0

But when I pull a drive from the hotswap bay, we just get those two
lines to the console, and the system freezes.

-- 
Removing modular bay drive causes system freeze
https://bugs.launchpad.net/bugs/12519
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