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Date:      Sat, 27 Feb 1999 20:23:17 +0100 (CET)
From:      volf@oasis.IAEhv.nl (Frank Volf)
To:        ken@plutotech.com (Kenneth D. Merry)
Cc:        volf@oasis.IAEhv.nl, freebsd-scsi@freebsd.org
Subject:   Re: ahc error message
Message-ID:  <199902271923.TAA00980@avalon.oasis.IAEhv.nl>
In-Reply-To: <199902262317.QAA53929@panzer.plutotech.com> from "Kenneth D. Merry" at "Feb 26, 1999  4:17:21 pm"

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Kenneth D. Merry wrote:
> The 'timed out while idle' messages mean that the drive did not return a
> command before the timeout period expired, and there was nothing going on
> on the bus at the time.  The timeout period for the da driver is 60
> seconds, so if a drive doesn't return a transaction in that period of time,
> something is certainly wrong.
> 
> This indicates that the drive is "going out to lunch" for some reason, and
> not responding to commands.
> 
> There are several possible explanations:
> 
>  - it could be a cabling or termination problem

Seems unlikely. Never experienced problems with FreeBSD 2.2.6 nor with 
windows/NT that is installed on another partition.

>  - it could be your drive has buggy firmware.  What kind of drive is it,
>    and how heavily loaded is it?  What was going on when the errors popped
>    up?

Yes, there was heavy disk activity going on at the moment the error occured.

> Some firmware revisions of the Quantum Atlas II showed symptoms like that
> under heavy load.

ahc0: <Adaptec aic7880 Ultra SCSI adapter> rev 0x00 int a irq 10 on pci0.6.0
ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs

...

da0 at ahc0 bus 0 target 0 lun 0
da0: <QUANTUM XP34550W LXY4> Fixed Direct Access SCSI-2 device 
da0: 20.000MB/s transfers (10.000MHz, offset 8, 16bit), Tagged Queueing Enabled
da0: 4341MB (8890760 512 byte sectors: 255H 63S/T 553C)

Is this the quantum drive you are talking about? I have no clue how to
determine the firmware version of this drive. Nor do I have a utility to
upgrade the firmware. Sigh...

Regards,

           Frank


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