From: Bart Van Assche <bvanassche@acm.org>
To: Tao Ma <tm@tao.ma>
Cc: linux-scsi@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: How to online remove an error scsi disk from the system?
Date: Fri, 01 Feb 2013 08:54:06 +0100 [thread overview]
Message-ID: <510B749E.8020501@acm.org> (raw)
In-Reply-To: <510B5CFC.2040801@tao.ma>
On 02/01/13 07:13, Tao Ma wrote:
> In our product system, we have several sata disks attached to one
> machine. So when one of the disk fails, the jbd2(yes, we use ext4) will
> hang forever and we will get something in /var/log/messages like below.
> It seems to me that the io sent to the scsi layer is never returned back
> with -EIO which is a little bit surprised for me(It should be a timeout
> somewhere, right?). We have tried echo "offline" >
> /sys/block/sdl/device/state, but it doesn't work. So is there any way
> for us to let the scsi device returns all the io requests back with EIO
> so that all the end_io can be called accordingly? Am I missing something
> here?
Please note that I'm not familiar with SAS. But I found this in
drivers/scsi/scsi_proc.c:
* proc_scsi_write - handle writes to /proc/scsi/scsi
* @file: not used
* @buf: buffer to write
* @length: length of buf, at most PAGE_SIZE
* @ppos: not used
*
* Description: this provides a legacy mechanism to add or remove
* devices by Host, Channel, ID, and Lun. To use,
* "echo 'scsi add-single-device 0 1 2 3' > /proc/scsi/scsi" or
* "echo 'scsi remove-single-device 0 1 2 3' > /proc/scsi/scsi" with
* "0 1 2 3" replaced by the Host, Channel, Id, and Lun.
Bart.
next prev parent reply other threads:[~2013-02-01 7:54 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-01 6:13 How to online remove an error scsi disk from the system? Tao Ma
2013-02-01 7:54 ` Bart Van Assche [this message]
2013-02-01 9:07 ` Tao Ma
2013-02-01 9:52 ` Bryn M. Reeves
2013-02-01 9:59 ` Tao Ma
2013-02-01 10:07 ` Bryn M. Reeves
2013-02-01 11:13 ` Tao Ma
2013-02-01 11:20 ` Bryn M. Reeves
2013-02-01 8:50 ` Jack Wang
2013-02-01 9:17 ` Tao Ma
2013-02-01 9:24 ` Jack Wang
2013-02-01 9:48 ` Tao Ma
2013-02-01 14:41 ` Hillf Danton
2013-10-16 16:22 ` taco
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