And if you really want to use UID, you should install the recently available VM64273 and follow the instructions in the sles10 sp2 release notes.
(although, still, I think a bad idea :) on z -- maybe a really good idea on a peecee perhaps). Marcy "This message may contain confidential and/or privileged information. If you are not the addressee or authorized to receive this for the addressee, you must not use, copy, disclose, or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation." -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Alan Altmark Sent: Tuesday, June 10, 2008 2:37 PM To: [email protected] Subject: Re: [LINUX-390] SLES 10 SP1 and SP2 install defaults of disk by device-ID On Tuesday, 06/10/2008 at 05:15 EDT, Mark Post <[EMAIL PROTECTED]> wrote: > The uid comes from the storage device itself. From one of my z/VM guests: > # cat /sys/bus/ccw/devices/0.0.0150/uid > IBM.75000000026069.1014.16 > > It is supposed to be unique to the hardware device itself, based on serial > number, or some such thing. If the actual hardware changes, so does that > value. The "by-name" value gets generated by the Linux kernel, based > on the > order of the device numbers that get passed to it. That's why the > names are > not persistent, and can change if the kernel parameters are changed without > preserving the original order. The UID is indeed unique to the device. It consists of manufacturer's name, plant of manufacture, and a serial number. That allows you to identify a volume, independent of how you access it (UAs, device numbers, chpids, etc.). Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
