2.0.36 + aic7xxx + 294X = Fragile

[Mike Leddy]

I started using one of my low load servers for backup images to
and found that running md5sum on a large file caused my SCSI
drive to lock up.

Sorry, no warning messages with aic7xxx=verbose

I tried md5sum /dev/zero - no problems

I installed an old IDE drive and using it everything worked fine so
my machine is OK.

I went back to an older 2.0.33 and the same test caused kernel
paging faults or crashed the system.

In summary I've got a system that boots and under normal load
works fine, but 'md5sum a-large-file' causes the SCSI disk to lock
up after approx 2 minutes.

I'll be happy to carry out any tests that may be of use or provide
any further information.

Mike Leddy - Systems Admin, Ultranet - Fortaleza, Brazil.


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Its got an oldish v1.2 firmware
----------------------------------------------------------------------
(scsi0) <Adaptec AHA-294X Ultra SCSI host adapter> found at PCI 14/0
(scsi0) Narrow Channel, SCSI ID=7, 16/255 SCBs
(scsi0) Warning - detected auto-termination
(scsi0) Please verify driver detected settings are correct.
(scsi0) If not, then please properly set the device termination
(scsi0) in the Adaptec SCSI BIOS by hitting CTRL-A when prompted
(scsi0) during machine bootup.
(scsi0) Cables present (Int-50 YES, Ext-50 NO)
(scsi0) Downloading sequencer code... 419 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.4/3.2.4
       <Adaptec AHA-294X Ultra SCSI host adapter>
scsi : 1 host.
  Vendor: QUANTUM   Model: VP32210           Rev: 81H8
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
scsi : detected 1 SCSI disk total.
(scsi0:0:0:0) Synchronous at 10.0 Mbyte/sec, offset 15.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 4308352 [2103 MB] [2.1 GB]
----------------------------------------------------------------------
Adaptec AIC7xxx driver version: 5.1.4/3.2.4
Compile Options:
  AIC7XXX_RESET_DELAY    : 5
  AIC7XXX_TAGGED_QUEUEING: Adapter Support Enabled
                             Check below to see which
                             devices use tagged queueing
  AIC7XXX_PAGE_ENABLE    : Enabled (This is no longer an option)
  AIC7XXX_PROC_STATS     : Enabled

Adapter Configuration:
           SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter
                           Ultra Narrow Controller
    PCI MMAPed I/O Base: 0xffbef000
 Adapter SEEPROM Config: SEEPROM found and used.
      Adaptec SCSI BIOS: Enabled
                    IRQ: 11
                   SCBs: Active 0, Max Active 1,
                         Allocated 15, HW 16, Page 255
             Interrupts: 152650
      BIOS Control Word: 0x08b6
   Adapter Control Word: 0x005d
   Extended Translation: Enabled
Disconnect Enable Flags: 0x00ff
     Ultra Enable Flags: 0x0000
 Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
    Tagged Queue By Device array for aic7xxx host instance 0:
      {255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
    Actual queue depth per device for aic7xxx host instance 0:
      {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}

Statistics:
(scsi0:0:0:0)
  Device using Narrow/Sync transfers at
  10.0 MByte/sec, offset 15
    Device Negotiation Settings
        Period Offset Bus Width
User       025    015        0
Goal       025    015        0
Current    025    015        0
    Total transfers 152621 (14922 read;137699 written)
      blks(512) rd=62915; blks(512) wr=324756
        < 512 512-1K   1-2K   2-4K   4-8K  8-16K 16-32K 32-64K 64-128K >128K
 Reads:     0      1  10916    413   2600    960     18     12      2      0 
Writes:     0      0 118430  19146     40     25     51      4      3      0

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