linux-kernel - Re: How to online remove an error scsi disk from the system?

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Message-ID: <510B9213.1040508@tao.ma>
Date:	Fri, 01 Feb 2013 17:59:47 +0800
From:	Tao Ma <tm@....ma>
To:	"Bryn M. Reeves" <bmr@...hat.com>
CC:	Bart Van Assche <bvanassche@....org>, linux-scsi@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: How to online remove an error scsi disk from the system?

On 02/01/2013 05:52 PM, Bryn M. Reeves wrote:
> On 02/01/2013 07:54 AM, Bart Van Assche wrote:
>>   * 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.
> 
> The proc interface is deprecated; this can all be done via sysfs today,
> e.g.:
> 
> echo 1 > /sys/block/sdc/device/delete
> 
> Is equivalent to issuing scsi remove-single-device to proc.
yes, but the result is the same. It will do some IO first which will
cause this command hang.

Thanks,
Tao
> 
> Regards,
> Bryn.
> 
> 
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