Networker

Re: [Networker] Changed persistent device names in RHEL 5.7

2011-08-11 09:31:18
Subject: Re: [Networker] Changed persistent device names in RHEL 5.7
From: terry.lemons AT EMC DOT COM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Thu, 11 Aug 2011 09:30:11 -0400
Hi Rich

Thanks very much for making us all aware of this.

Questions, if I may:
- if a RHEL 5.6 system is upgraded to 5.7, do existing persistent names get 
changed to the 'user-friendly' persistent names?  If so, this would 'break' an 
existing NetWorker configuration, requiring some re-configuration.
- do I assume correctly that NetWorker for Linux will be able to use these 
new-format persistent names?
- is there a way to instruct udev to NOT use these new 'user-friendly' names in 
an upgrade situation (which would preserve the existing names, and so would NOT 
'break' an existing NetWorker configuration)?

Thanks
tl

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of Rich Graves
Sent: Thursday, August 11, 2011 9:04 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Changed persistent device names in RHEL 5.7

Heads up for anyone else using persistent device names on RHEL:

RHEL 5.7 (kernel 2.6.18-274.el5, udev-095-14.27.el5) adds "user-friendly" 
descriptions to /dev/tape/by-id/*, thus breaking anything that depends on 
persistent names. /dev/tape/by-id/scsi-1IBM_3573-TL_XXXXXXXXXXXX_LL0 becomes 
/dev/tape/bu-id/scsi-1IBM_3573-TL_XXXXXXXXXXXX_LL0-changer, and the drives 
themselves get -sg, -st, -nst suffixes.

This is quite easy to fix, but takes some troubleshooting time if you weren't 
expecting it.
-- 
Rich Graves http://claimid.com/rcgraves
Carleton.edu Sr UNIX and Security Admin

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