ADSM-L

Re: Question on LTO-2 dual-path fiber attach drives (AIX platform)

2004-04-20 12:15:24
Subject: Re: Question on LTO-2 dual-path fiber attach drives (AIX platform)
From: Joni Moyer <joni.moyer AT HIGHMARK DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Tue, 20 Apr 2004 12:14:38 -0400
Tom,

>From what I understand, LTO2 aren't dual attached drives, so you wouldn't
need the Control Path Failover for your server.  Now, the 3592's are dual
attached, but they are enterprise drives and $$$$.  Please someone correct
me if I'm wrong concerning the dual paths on the drives...


********************************
Joni Moyer
Highmark
Storage Systems
Work:(717)302-6603
Fax:(717)302-5974
joni.moyer AT highmark DOT com
********************************



             Tom Kauffman
             <[email protected]
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             Sent by: "ADSM:           ADSM-L AT VM.MARIST DOT EDU
             Dist Stor                                                  cc
             Manager"
             <[email protected]                                     Subject
             .EDU>                     Question on LTO-2 dual-path fiber
                                       attach drives (AIX platform)

             04/20/2004 11:33
             AM


             Please respond to
             "ADSM: Dist Stor
                 Manager"
             <[email protected]
                   .EDU>






It is time to upgrade our tape drives - the current lease is coming up for
renewal. I will be replacing LTO-1 SCSI drives with LTO-2 fiber drives. Do
I
need to get the AIX 'Control Path Fallover' option for TSM to properly
recognize that there are two paths to a drive and only use one? My current
understanding is that Control Path Fallover will allow TSM to continue a
process running against a particular tape and tape drive on the second path
if the first fails, as opposed to cancelling the process (and possibly
flagging the tape as unavailable).

Realisticly, how often does a path fail in the real world? We currently
have
two 2019-F16 switches and will be adding two more with the tape drives. We
also have just the one TSM server and are not currently planning on running
anything LAN-free.

TIA

Tom Kauffman
NIBCO, Inc

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