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Re: [libvirt] [TCK PATCH] block devices: allow specification of size for safety



On 05/05/2010 01:31 PM, Jim Meyering wrote:
>> Can we provide the option to specify the device serial number so that
>> it's really impossible to trash the wrong device?
> 
> Given that this is a good idea, next question is obviously
> how to get the serial number.  One way seems to be via hdparm,
> e.g., hdparm -i /dev/sda
> 
>     /dev/sda:
> 
>      Model=ST3320620AS, FwRev=3.AAK, SerialNo=9QF6ET0H

Great for SCSI, not so great for USB sticks:

# hdparm -i /dev/sdb

/dev/sdb:
 HDIO_DRIVE_CMD(identify) failed: Invalid exchange
 HDIO_GET_IDENTITY failed: Invalid argument
# echo $?
22

-- 
Eric Blake   eblake redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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