From: James Bottomley <James.Bottomley@SteelEye.com>
To: "Salyzyn, Mark" <mark_salyzyn@adaptec.com>
Cc: Linux SCSI <linux-scsi@vger.kernel.org>
Subject: Re: SAI_READ_CAPACITY_16?
Date: Wed, 06 Apr 2005 14:27:14 -0400 [thread overview]
Message-ID: <1112812035.5555.20.camel@mulgrave> (raw)
In-Reply-To: <60807403EABEB443939A5A7AA8A7458BFF2211@otce2k01.adaptec.com>
On Wed, 2005-04-06 at 12:00 -0400, Salyzyn, Mark wrote:
> For some reason, sd_read_capacity (in sd.c) in the 2.6.9-5.EL (RHEL4)
> kernel is not issuing the SERVICE_REQUEST_IN+SAI_READ_CAPACITY_16
> command to the queuecommand handler (the handler is not even called),
> even though it instruments up that the command is issued (and returns
> not supported). The READ_CAPACITY call makes it through successfully
> indicating 0xFFFFFFFF capacity to trigger the SAI_READ_CAPACITY_16
> request fine. Could there be a bug in the scsi layers reissuing commands
> reusing the request structure misdirecting the requests?
The person who coded it gave a success report on it ... and I've had
several others since then.
On a 32 bit system, you have to have CONFIG_LBD for it to work.
This code is pretty verbose, what are your kernel traces?
James
next prev parent reply other threads:[~2005-04-06 18:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-06 16:00 SAI_READ_CAPACITY_16? Salyzyn, Mark
2005-04-06 16:11 ` SAI_READ_CAPACITY_16? Ming Zhang
2005-04-06 18:27 ` James Bottomley [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-04-06 18:30 SAI_READ_CAPACITY_16? Salyzyn, Mark
2005-04-06 18:32 ` SAI_READ_CAPACITY_16? Ming Zhang
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