Weird problem

[Mark O. Stitson]

I have the same problem with my SX164 freezing on large disk activity on
the 2.4.4 and 2.4.5 kernels, yet everything works fine with 2.2.18. So
I doubt it is the HDDs problem. I will try some of the parameters you
tried in your later e-mails.

Mark

PS: cat /proc/scsi/scsi gives
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: IBM      Model: DDRS-34560W      Rev: S92A
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: IBM      Model: DDYS-T09170N     Rev: S96H
  Type:   Direct-Access                    ANSI SCSI revision: 03
Host: scsi0 Channel: 00 Id: 06 Lun: 00
  Vendor: TEAC     Model: CD-ROM CD-532S   Rev: 1.0A
  Type:   CD-ROM                           ANSI SCSI revision: 02

and lspci says:

00:05.0 SCSI storage controller: Adaptec AIC-7881U (rev 01)



On Wed, 16 May 2001, Metod Kozelj wrote:

> Hello,
>
> A short question: with AIC7xxx v6.1.13 / linux v2.4.4, is it possible to
> limit Tagged opennings/Max command opennings per device?
>
> Problem description:
> I'm running linux 2.4.4, aic7xxx 6.1.13 on alpha SX164. I have 2940UW
> (lspci says it's a "00:06.0 SCSI storage controller: Adaptec AIC-7881U"),
> with following devices attached:
>
> Attached devices:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
>   Vendor: SEAGATE  Model: ST34572N         Rev: 0784
>   Type:   Direct-Access                    ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
>   Vendor: DEC      Model: RZ28D    (C) DEC Rev: 0008
>   Type:   Direct-Access                    ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 04 Lun: 00
>   Vendor: NEC      Model: CD-ROM DRIVE:465 Rev: 1.03
>   Type:   CD-ROM                           ANSI SCSI revision: 02
>
> The device 0:1:0 (aka RZ28D) is actually a Seagate ST32556W with DEC'
> firmware (sold as "Alpha Station Option"). This is the only wide device,
> the other two are narrow.
>
> The problematic device seems to be this particular HD. Everything runs
> fine until some massive write to this device (reading is fine, though).
> After that the system freezes solid and only cure is to hit the reset
> button. It seems to me that this disk actually locks up the SCSI bus as
> the SCSI controler led lights up and the led on that particular disk also.
>
> The system freeze doesn't happen if the massive write happens to the other
> disk. And there wasn't any problem with this particular disk drive while
> running linux 2.2.19 with aic7xxx v5.1.33 with max tagged comands set to
> 16.
>
> Any hint?
>
> Regards,
>   Metod
>
> Metod Kozelj
>
> mailto:Metod.Kozelj at rzs-hm.si            /\  Ne posiljajte mi smeti ker grizem!
> http://www.rzs-hm.si/                   /  \  Don't spam me for I bite!
> _______________________________________/    \__________________________________
>
> ---- perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'
>
>
>
>
> PS. /proc/scsi/aic7xxx/0 entries:
>
> Adaptec AIC7xxx driver version: 6.1.13
> aic7880: Ultra Wide Channel A, SCSI Id=7, 16/255 SCBs
> Channel A Target 0 Negotiation Settings
>         User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
>         Goal: 20.000MB/s transfers (20.000MHz, offset 15)
>         Curr: 20.000MB/s transfers (20.000MHz, offset 15)
>         Channel A Target 0 Lun 0 Settings
>                 Commands Queued 10858
>                 Commands Active 0
>                 Command Openings 63
>                 Max Tagged Openings 253
>                 Device Queue Frozen Count 0
> Channel A Target 1 Negotiation Settings
>         User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
>         Goal: 20.000MB/s transfers (10.000MHz, offset 8, 16bit)
>         Curr: 20.000MB/s transfers (10.000MHz, offset 8, 16bit)
>         Channel A Target 1 Lun 0 Settings
>                 Commands Queued 6535
>                 Commands Active 0
>                 Command Openings 63
>                 Max Tagged Openings 253
>                 Device Queue Frozen Count 0
> Channel A Target 4 Negotiation Settings
>         User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
>         Goal: 20.000MB/s transfers (20.000MHz, offset 15)
>         Curr: 3.300MB/s transfers
>         Channel A Target 4 Lun 0 Settings
>                 Commands Queued 1
>                 Commands Active 0
>                 Command Openings 1
>                 Max Tagged Openings 0
>                 Device Queue Frozen Count 0
>
>
>
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>

----------------------------------------------------------------
Dr Mark O. Stitson, System Administrator,
Yospace Ltd, 7 The Courtyard, High Street, Staines, UK, TW18 4DP
Tel: +44 1784 466388
Fax: +44 1784 466387
WWW: http://www.yospace.com



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