Yes, the WWN would be changing - is that "user modify-able as well as the
serial #?
From:
Steven Langdale <steven.langdale AT GMAIL DOT COM>
To:
ADSM-L AT VM.MARIST DOT EDU
Date:
02/11/2011 03:57 PM
Subject:
Re: [ADSM-L] There has got to be a better way - revisited
Sent by:
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
is the WWN for the drive changing?
If so, the servers would/should see a new drive.
On Feb 11, 2011 8:28pm, Zoltan Forray/AC/VCU <zforray AT vcu DOT edu> wrote:
> Back a while ago, I posted a similar discussion about the trials and
> tribulations of tape drive (TS1120/TS1130) replacement and the work it
> caused when the serial number changed (rebooting and reconfiguring all
TSM
> servers). I was enlightened that the new drives serial number could be
> reset to the old drives serial number and the issue of having to reboot
> all 7-TSM servers because of a drive replacement, was, I thought,
> resolved.
> Well, I haven't had a need to drive replacement since then........until
> now.
> What I discovered was that even with the replacement drive co-opting the
> serial number of the failing drive, I still have to reboot all of my
> servers.
> Yes, I made sure to update the new drives serial number BEFORE plugging
in
> the fibre cable.
> Took the library and drives offline in TSM
> Yet, as soon as the failing drive was unplugged (or at least it seems
that
> way), the /dev/IBMtape? device becomes unavailable and no amount of
> stopping/restarting the lin_tape processes will make the drive
accessible.
> Reboot is required. Any attempt to open the drive via IBMtapeutil fails
> (Operation failed with errno 5: Input/output error).
> So, what are we doing wrong? How do you handle tape drive
> repairs/replacement?
> To recap my environment:
> IBM3494 with TS1120 and TS1130 drives connected via fibre
> CISCO SAN switches
> Single path to each drive (not enough switch ports)
> RHEL4 and RHEL5 servers
> My SAN guy says we are not mapping drives by WWN - pools/groups I think
> (sorry - I don't know the terminology) - all tape drives and servers
that
> use them are separate from disk connections
> Zoltan Forray
> TSM Software & Hardware Administrator
> Virginia Commonwealth University
> UCC/Office of Technology Services
> zforray AT vcu DOT edu - 804-828-4807
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