Annoying SCSI waiting...
Scott Long
scottl at freebsd.org
Fri Oct 22 13:22:59 PDT 2004
Julian Elischer wrote:
>
>
> Andre Oppermann wrote:
>
>> Can't we just reduce the annoying:
>>
>> Waiting 15 second for SCSI devices to settle
>>
>> to something shorter like 5 seconds in GENERIC? I know perfectly well
>> where it
>> came from but these days not many of those slow disks are still around.
>
>
>
> Actually I'll wager money you DON'T know where it came from because it's
> really obscure :-)
>
> When I wrote the original SCSI code I wrote it for MACH and only later
> did I port it to 386BSD
> from which it went to FreeBSD (and is still in NetBSD I believe). I
> originally selected 15 seconds
> because it was needed by an AEG SCSI neural net based OCR/ICR character
> recognition engine
> we used to use with MACH.
>
> I set it to 3 seconds on my systems..
>
I won't argue that it orginated there, but it's also been quite
convenient for tape drives, cdroms, and changers. I usually modify
the timeout except for systems that have this.
Scott
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