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[Martin Koniczek <1559609@xxxxxxxxxxxxxxxxxx>]

can't run apport-collect on the affected system because the filesystem
got ovverriden. the log lines posted in the original bug report are from
a remote rsyslog server capturing the event. the timeout bug in itself
is not new, it is a longstanding issue with that particular version of
the areca driver and the 1882 controller.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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Title:
  arcmsr times out with ARC1882 RAID card

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  tested the latest xenial iso on a file server featuring an ARC-
  1882ix-24 RAID controller, and got weird timeout issues, followed by
  complete loss of access to anything connected to the RAID controller.
  The timeouts occur after a random amount of uptime (sometimes minutes,
  sometimes days), for example:

  kernel: [1665409.969229] arcmsr2: abort device command of scsi id = 0 lun = 1
  kernel: [1665411.727535] arcmsr2: scsi id = 0 lun = 1 ccb = '0xffff884fe008e780' poll command abort successfully
  kernel: [1665411.727885] arcmsr2: abort device command of scsi id = 0 lun = 1
  kernel: [1665411.727898] arcmsr2: abort device command of scsi id = 0 lun = 1
  kernel: [1665413.138235] arcmsr2: scsi id = 0 lun = 1 ccb = '0xffff884fe0012300' poll command abort successfully
  ...
  kernel: [1665445.804546] arcmsr: executing bus reset eh.....num_resets = 2, num_aborts = 146
  kernel: [1665455.851353] arcmsr2: pCCB ='0xffff884fe002a700' isr got aborted command
  kernel: [1665455.851366] arcmsr2: pCCB ='0xffff884fe01c0a00' isr got aborted command
  kernel: [1665455.851373] arcmsr2: isr get an illegal ccb command #011#011#011#011done acb = '0xffff884fe0b8c798'ccb = '0xffff884fe00e9680' ccbacb = '0xffff884fe0b8c798' startdone = 0x0 ccboutstandingcount = -1
  kernel: [1665455.851378] arcmsr2: isr get an illegal ccb command #011#011#011#011done acb = '0xffff884fe0b8c798'ccb = '0xffff884fe0070280' ccbacb = '0xffff884fe0b8c798' startdone = 0x0 ccboutstandingcount = -1
  ...
  kernel: [1665455.852655] sd 2:0:0:3: [sdd] Medium access timeout failure. Offlining disk!
  kernel: [1665455.890032] sd 2:0:0:4: [sde] Medium access timeout failure. Offlining disk!
  kernel: [1665455.926613] sd 2:0:0:1: [sdb] Medium access timeout failure. Offlining disk!
  kernel: [1665455.963288] sd 2:0:0:2: [sdc] Medium access timeout failure. Offlining disk!

  
  some digging revealed that mainline 4.4 as well as xenial's 4.4.0-14-generic still feature an old, buggy arcmsr driver  v1.30.00.04-20140919, which claims to "supports" the 1882, but does not really...

  Areca seems to have managed to get a fixed driver into mainline 4.5
  (version v1.30.00.22-20151126), and it seems to be a small patch on
  arcmsr.h and a large one on arcmsr_hba.c, and upon a first glance, I
  didn't see anything 4.5-specific in the code:

  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/drivers/scsi/arcmsr/arcmsr.h?id=v4.5&id2=v4.4
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/diff/drivers/scsi/arcmsr/arcmsr_hba.c?id=v4.5&id2=v4.4

  Note that we are using v1.30.0X.21-20151016 (as provided by
  Areca.com.tw) on productive 14.04.4 LTS servers featuring ARC1882
  controllers, so chances are good that version 22 (as included in 4.5
  mainline) to work well.

  This would not only allow ARC-188x controllers to work properly with
  Xenial out-of-the-box, it should also add support for the (somewhat
  popular?) ARC-1203 series

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