Yes: for example, the IBMtape/Atape etc device driver can help your host to
manage data path failover (DPF) for your drives and control path failover
(CPF) for the library's robotics. It can also help with its dynamic load
balancing feature as it tries to ensure that, if multiple paths exist from
host to drive, the least utilised path gets used (depending upon
OS/drive/driver you may need manually to configure this feature, and it may
be at cost). Also consider that drives have different connectivity options -
for example, IBM TS1120/1130 drives can be dual-attached to the SAN thereby
potentially reducing the risk of isolation in event of a single SAN
component failure, however LTO drives only have one fibre connection.
/DMc
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Grigori Solonovitch
Sent: 11 October 2009 12:09
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] MPIO for tape libraries
Of course, you need MPIO for fiber optics tape drives. It is not only high
availability. It is better performance as well.
Grigori G. Solonovitch
Senior Technical Architect
Information Technology Bank of Kuwait and Middle East http://www.bkme.com
Phone: (+965) 2231-2274 Mobile: (+965) 99798073 E-Mail:
G.Solonovitch AT bkme DOT com
Please consider the environment before printing this Email
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Mehdi Salehi
Sent: Sunday, October 11, 2009 1:57 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] MPIO for tape libraries
Hi,
Does it make sense to have MPIO for tapes? As tape libraries play an
important role in TSM, their connection to hosts and specially to TSM server
itself should be a reliable one. Should I expect to have link failover
and/or load balancing for tape drives (something like SDDPCM, HDLM, ... for
disk subsystems)?
Thanks
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