Date: Mon, 05 Apr 2010 09:37:22 +0300 From: Alexander Motin <mav@FreeBSD.org> To: mj@feral.com Cc: freebsd-scsi@freebsd.org Subject: Re: adding a "retry command after a delay" error Message-ID: <4BB98522.6000704@FreeBSD.org> In-Reply-To: <1269900407.00235175.1269888603@10.7.7.3> References: <1269900407.00235175.1269888603@10.7.7.3>
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Matthew Jacob wrote: > This is something I whipped up for dealing with some > active/active-after-failover-time systems. I wanted to have a general > facility to say of an ASC/ASCQ- retry the command, but after a period of > delay. > > Wonder if anyone had comments? > http://people.freebsd.org/~mjacob/delay_diffs.txt I am not SCSI expert yet, but it seems OK for me. But I see two related questions there: delay time and number of retries allowed. Most of peripheral drivers now AFAIR ask to do only few (2-5) retries, so if delay will be short - it may give up too early, but long delay will probably reduce performance. -- Alexander Motin
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