Today at 6:06pm, Matthew Huff wrote:

What's generally called "drive persistence" is a fiber channel feature that under unix maps a Fiber 
Channel WWN to a fixed unix device name. In windows, even with fiber channel drivers that support 
"persistence", it merely maps the FC WWN to a lower level device, however Windows "Plug & 
Player" driver will re-number the device on top of that, so \\.\tape0 , etc could be a different drive each 
time (although normally it won't be, it's usually when something in the order changes, the drives get renumbered 
differently.

However, once you use either the IBM tape driver or Microsoft new fix then the 
drivers will get created like \\.\tapeSERIALNUMBER so that no matter what order 
they get created by the Plug & Play driver, they will always have the same 
name. After the reboot you will have to edit your jukebox with the new drive names, 
but you should be set.

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On 
Behalf Of James E. Pratt
Sent: Tuesday, March 11, 2008 5:43 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Library/Drive Names getting shuffled by Windows.

Ok. So I am also afflicted with this "dev shuffle" issue. After looking
at this "hotfix", and comparing to our NW 7.4 windows 2003 r2 (patched
via windows update last week), I see I have a version number that is
much higher on tape.sys, so needless to say, after running regedit, I
see I also have the
\\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Tape\Persistence
value there, but alas it was set to 0 ... :(

So I changed it to a 1. I'm not in a position to reboot right now
(backups are running), but I will indeed reboot it tomorrow to see if
the tape0-3 device names in winblows get shuffled again.

Anyhow, I'm certainly not installing some hotfix that is from last july,
and are obviously outdated, given the versions on our server and the
ones in these kb's.. So, I'll let you know... I'm actually kind of
baffled this problem still exists at all to be honest. I had to fight it
for years with a physical (pos) hp msl series library with 6 drives. :\

Lastly, what persistence are you talking about when you say it only
applies to *nix?

Regards,
Jamie

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On Behalf Of Matthew Huff
Sent: Tuesday, March 11, 2008 4:02 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Library/Drive Names getting shuffled by
Windows.

There really shouldn't be a need to do this. If you apply the windows
hotfix, the device names change to ones that use the serial# of the
drive, so they won't change even if the order changes.

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On Behalf Of MIchael Leone
Sent: Tuesday, March 11, 2008 3:53 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Library/Drive Names getting shuffled by
Windows.

"Hutchison, Jay A" <Jay.Hutchison AT va DOT gov> wrote on 03/11/2008 03:13:00
PM:

We have a procedure that does not require you to delete and recreate

the

library if anyones interested. It`s just a rescan and reconfigure.

I'd be interested, especially if it's automated ...

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--
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Sr Systems Administrator        | Always remember: You are UNIQUE,
University of Vermont           |    just like everyone else.
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