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Date: Fri, 22 Oct 2004 14:21:17 -0600
From: Scott Long <scottl@freebsd.org>
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To: Julian Elischer <julian@elischer.org>
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cc: freebsd-current@freebsd.org
cc: Andre Oppermann <andre@freebsd.org>
Subject: Re: Annoying SCSI waiting...
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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