Re: scsi drive error - squid blocking - lost swap.state

Ahh, yes. We used to get a lot of those on our remote proxies.
Guaranteed to screw the machine up (or hang it solid in an SMP
configuration). It's a problem with the type of hardware or the driver
(we only ever get this with Adaptec stuff, the aic7xxx driver, to be
precise).

We don't have a cure, and the glitch is not necessarily connected to
load (although on our worst machines you could virtually guarantee it by
doing an mke2fs). Kernel 2.0.36 has (so far) given us the lowest
incidence of the fault. Our twin PPro machines suffer most, while our
twin Xeon boxen hardly (if ever) do this.

My heartfelt sympathy on this one. It sucks pond-scum.

D

Alastair Waddell wrote:
>
> I suffered a scsi failure today of variety:
>
> Apr 6 20:37:07 kernel: scsi : aborting command due to timeout : pid
> 9737610, scsi0
> , channel 0, id 1, lun 0 Write (6) 00 00 41 02 00
>
> I was unable to release squid which was blocking in a permanent state
> necessitating a physical reboot (shutdown and kill/kill -9 ineffective).
> Bummer.
>
> I unmounted and commented out (in squid.conf) the particular drive and
> restarted squid with my two remaining spindles.
>
> Later I twice fsck'd the drive with a check for bad blocks prior to
> mounting and restarting squid.
>
> The problem is twofold:
>
> 1: How can something like this happen/is there a way I could have done
> without the reboot (servers are remote located).
>
> 2: How come my swap.state file has truncated (fsck with bad block check?
> running squid with 2/3 of it's spindles???)
>
> I'm particularly upset, read pissed, because I only just rebuild the
> storage in this 8.7GB drive after losing it a month ago (when my IDE/OS
> drive failed).
>
> Finally, do I have to delete the 6.5 GB on this drive now that the
> swap.state file is 'altered'?
>
> (any comments on the IBM drives shown below ??)
>
> Filesystem 1024-blocks Used Available Capacity Mounted on
> /dev/sda1 8589226 6387716 1756110 78% /mnt/cache1
> -rw-r--r-- 1 squid squid 114672 Apr 7 02:33 swap.state
>
> Linux 2.2.2 (RH5.2 with all updates)
> vendor_id : GenuineIntel
> model name : Celeron (Covington)
> cpu MHz : 412.371201
> MemTotal: 258196 kB
> SwapTotal: 133048 kB
>
> Squid Cache: Version 2.1.PATCH2
>
> (scsi0) <Adaptec AIC-7895 Ultra SCSI host adapter> found at PCI 20/0
> (scsi0) Wide Channel A, SCSI ID=7, 255/255 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 NO, Int-68 NO, Ext-68 NO)
> (scsi0) Downloading sequencer code... 394 instructions downloaded
> (scsi1) <Adaptec AIC-7895 Ultra SCSI host adapter> found at PCI 20/1
> (scsi1) Wide Channel B, SCSI ID=7, 255/255 SCBs
> (scsi1) Warning - detected auto-termination
> (scsi1) Please verify driver detected settings are correct.
> (scsi1) If not, then please properly set the device termination
> (scsi1) in the Adaptec SCSI BIOS by hitting CTRL-A when prompted
> (scsi1) during machine bootup.
> (scsi1) Cables present (Int-50 NO, Int-68 NO, Ext-68 NO)
> (scsi1) Downloading sequencer code... 394 instructions downloaded
> scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.10/3.2.4
> <Adaptec AIC-7895 Ultra SCSI host adapter>
> scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.10/3.2.4
> <Adaptec AIC-7895 Ultra SCSI host adapter>
> scsi : 2 hosts.
> Vendor: IBM Model: DGVS09U Rev: 0350
> Type: Direct-Access ANSI SCSI revision: 03
> Detected scsi disk sda at scsi0, channel 0, id 1, lun 0
> Vendor: IBM Model: DDRS-34560W Rev: S97B
> Type: Direct-Access ANSI SCSI revision: 02
> Detected scsi disk sdb at scsi1, channel 0, id 5, lun 0
> Vendor: IBM Model: DDRS-34560W Rev: S97B
> Type: Direct-Access ANSI SCSI revision: 02
> Detected scsi disk sdc at scsi1, channel 0, id 6, lun 0
> (scsi0:0:1:0) Synchronous at 40.0 Mbyte/sec, offset 8.
> SCSI device sda: hdwr sector= 512 bytes. Sectors= 17829870 [8705 MB]
> [8.7 GB]
> sda: sda1
> (scsi1:0:5:0) Synchronous at 40.0 Mbyte/sec, offset 8.
> SCSI device sdb: hdwr sector= 512 bytes. Sectors= 8925000 [4357 MB] [4.4
> GB]
> sdb: sdb1
> (scsi1:0:6:0) Synchronous at 40.0 Mbyte/sec, offset 8.
> SCSI device sdc: hdwr sector= 512 bytes. Sectors= 8925000 [4357 MB] [4.4
> GB]
> sdc: sdc1
>
> --
> ----------------------------------------------------------------------
> Alastair Waddell o Tel +61 3 96400400
> Legion Internet
> Queen Street, Melbourne o Full featured VISP Facility
>
> Virtual Services + DNS Maintenance + ISP Co-location + Internetworking
Received on Tue Apr 06 1999 - 16:27:30 MDT