SCSI problems with Linux kernel 2.0.36 (aic7xxx 5.1.4), (SCB paging?)

[Torsten Hilbrich]

Please send me a CC of your reply, I'm currently not reading this
list.  Thanks in advance.

After installing the 2.0.36 kernel (previously using the 2.0.35 one) I
noticed SCSI problems while doing backups on a DDS2-DAT streamer.

After backup up about 3.0-3.5 GB of data the driver started screaming
about:

Dec 10 10:35:25 myrkr kernel: scsi : aborting command due to timeout : pid 1593026, scsi0, channel 0, id 2, lun 0 Read (10) 00 00 2d 98 e3 00 00 01 00  
Dec 10 10:35:25 myrkr kernel: scsi : aborting command due to timeout : pid 1593027, scsi0, channel 0, id 2, lun 0 Read (10) 00 00 24 42 01 00 00 01 00  
Dec 10 10:35:26 myrkr kernel: SCSI host 0 abort (pid 1593026) timed out - resetting 
Dec 10 10:35:26 myrkr kernel: SCSI bus is being reset for host 0 channel 0. 
Dec 10 10:50:28 myrkr kernel: scsi : aborting command due to timeout : pid 1899023, scsi0, channel 0, id 2, lun 0 Read (10) 00 00 2e db c8 00 00 01 00  
Dec 10 10:50:28 myrkr kernel: scsi : aborting command due to timeout : pid 1899024, scsi0, channel 0, id 2, lun 0 Read (10) 00 00 3a 7d 04 00 00 01 00  
Dec 10 10:50:29 myrkr kernel: SCSI host 0 abort (pid 1899023) timed out - resetting 
Dec 10 10:50:29 myrkr kernel: SCSI bus is being reset for host 0 channel 0. 

id2 is one of my hard discs, complete information will follow.

While these messages are generated the whole system stand still for
about 5 seconds (I was working in X11 this time, even the mouse cursor
didn't move).

If I use the linux kernel 2.0.35 (with the aic7xxxx 5.0.19 driver) I
never got this problems, I'm able to complete my ~4GB backup without
any problems.  Back in 2.0.34 I was able to crash the machine doing
backups with the SCB paging option enabled, just in case you're
interested.  As I see in the options list below, SCB paging is enabled
by default (and no longer optional).  Maybe this is the source of my
problems with this driver.

To my application (the backup program afbackup 3.1) the above problems
are reported as media error on the tape, the author told me that he
would expect some better indication of general scsi problems.

If you need additional information please tell me, I will try to
support you in solving this problem.

Thanks for your help,

	Torsten

Here are the complete data of my configuration:

myrkr# cat /proc/scsi/scsi 
Attached devices: 
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM      Model: DCAS-34330       Rev: S65A
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: TOSHIBA  Model: CD-ROM XM-3701TA Rev: 0236
  Type:   CD-ROM                           ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: Quantum  Model: XP32150          Rev: L912
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
  Vendor: HP       Model: C1533A           Rev: A612
  Type:   Sequential-Access                ANSI SCSI revision: 02

myrkr# cat /proc/scsi/aic7xxx/0
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     : Disabled

Adapter Configuration:
           SCSI Adapter: Adaptec AHA-294X SCSI host adapter
                           Narrow Controller
    PCI MMAPed I/O Base: 0xfafc0000
 Adapter SEEPROM Config: SEEPROM found and used.
      Adaptec SCSI BIOS: Enabled
                    IRQ: 12
                   SCBs: Active 0, Max Active 2,
                         Allocated 15, HW 16, Page 255
             Interrupts: 99215
      BIOS Control Word: 0x18b6
   Adapter Control Word: 0x005d
   Extended Translation: Enabled
Disconnect Enable Flags: 0x00ff
 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 59391 (52374 read;7017 written)
      blks(512) rd=164979; blks(512) wr=19700


(scsi0:0:2:0)
  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 39778 (32011 read;7767 written)
      blks(512) rd=118173; blks(512) wr=54012

-- 
Homepage: http://www.in-berlin.de/User/myrkr

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