RE: iSCSI: problem with LUN discovery

["Y P Cheng" <ycheng@advansys.com>]

> -----Original Message-----
> From: owner-ips@ece.cmu.edu [mailto:owner-ips@ece.cmu.edu]On Behalf Of
> Nelson Nahum
>
> The problem is that the signature written by the VxVM is not standard and
> only is recognized by the Veritas VxVM.
> Due to the fact that the important thing is to identify the media not the
> controller (as Veritas does), the best way is to have the serial number
> written in the media in a non accessible sector, and loaded by the
> controller to one of the Inquiry pages of the LU. In this manner no matter
> which channel, WWN, LUN  the specific LUN is presented can be
> recognized by every initiator.

Every 1394 and Fibre Channel node, including disk drives, has a GUID, Global
Unique ID. They are saved in EEPROM by manufacturers.  I believe T10 also
has a mechanism to report a unique name of a device using mode select.
(Page 83h? Someone help!)  iSCSI should make sure that each device has a
GUID available by mode select for the initiators.  No need to reinvent
another mechanism.


Y.P. Cheng, CTO, ConnectCom Solutions Corp.