On 26/02/13 19:22, Tregaron Bayly wrote:
On Tue, 2013-02-26 at 19:10 +0000, Benjamin ESTRABAUD wrote:
I've been wondering where in the target driver the IBLOCK VPD
"unit_serial" attribute was populated.
It originates in generate_wwn() in rtslib/utils.py, which generates a
random uuid using python's uuid library.
I seem to get a "random" id regardless of whether the IBLOCK is created over a standard
block device (a RAID), or a SCSI one (a SATA or SAS drive).
Correct
Also, can this be modified through the configfs interface?
Yes, provided that the export_count is zero (ie it is not currently
exported as a lun) you can echo the desired serial number to
target/core/iblock_#/<configname>/wwn/vpd_unit_serial.
In the json savefile it is stored (and retrieved) in the wwn value for
each object in the storage_objects array.
hth,
Tregaron Bayly
This does help a lot indeed! I was searching and searching through the
driver source without finding anything, never occured to me that this
could have been set in userland! Thanks! :)
I had also tried to update the unit_serial through configfs but of
course my export_count was not zero. This explains that too.
Thanks a lot for your help!
Regards,
Ben.
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