Re: [PATCH] permit READ DEFECT DATA in block/scsi_ioctl

[Jens Axboe <axboe@suse.de>]

On Fri, Sep 09 2005, Douglas Gilbert wrote:
> The soon to be released smartmontools 5.34 uses the
> READ DEFECT DATA command on SCSI disks. A disk that
> has defect list entries (or worse, an increasing number
> of them) is at risk.
> 
> Currently the first invocation of smartctl causes this:
>    scsi: unknown opcode 0x37
> message to appear the console and in the log.
> 
> The READ DEFECT DATA SCSI command does not change
> the state of a disk. Its opcode (0x37) is valid for
> SBC devices (e.g. disks) and SMC-2 devices (media
> changers) where it is called INITIALIZE STATUS ELEMENT
> WITH RANGE and again doesn't change the external state
> of the device.
> 
> The patch is against lk 2.6.13 .
> 
> Changelog:
>   - mark SCSI opcode 0x37 (READ DEFECT DATA) as
>     safe_for_read
> 
> Signed-off-by: Douglas Gilbert <dougg@torque.net>

Fine with me.

Acked-by: Jens Axboe <axboe@suse.de>

-- 
Jens Axboe

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