From: "Benjamin Herrenschmidt" <benh@kernel.crashing.org>
To: "Russell King" <rmk@arm.linux.org.uk>,
"Mike Anderson" <andmike@us.ibm.com>
Cc: <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.19 SCSI core bug?
Date: Thu, 12 Sep 2002 11:41:17 +0200 [thread overview]
Message-ID: <20020912094117.10936@192.168.4.1> (raw)
In-Reply-To: <20020912174530.B3121@flint.arm.linux.org.uk>
>1. we need to come up with a way of reasonably handing SCSI medium
> errors if we are going to use the READ10 command with the FUA
> bit clear.
>
>2. we could just set the FUA bit and bypass the drives on-board
> cache completely.
>
>Note that the only reason I've found this is because my HBA drives
>are _really_ pedantic about checking that all expected data does
>in fact get transferred by the drive.
>
>I wonder how many other drives out there are buggy like this. 8/
What about setting FUA on the next command after an error ?
Would this work or may the disk really keep stale data around ?
I don't have a recent SCSI spec at hand, but is there a command
we can send after an error to force a cache flush & invalidate
or will it only flush dirty datas to platter and not invalidate ?
Ben.
prev parent reply other threads:[~2002-09-12 21:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-11 21:19 2.4.19 SCSI core bug? Russell King
2002-09-12 9:01 ` Russell King
2002-09-12 15:39 ` Mike Anderson
2002-09-12 15:42 ` Russell King
2002-09-12 16:45 ` Russell King
2002-09-12 9:41 ` Benjamin Herrenschmidt [this message]
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