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тАО01-06-2005 06:44 PM
тАО01-06-2005 06:44 PM
2) is high avilability possible in Tape Drives/libraries?
3) are there any drives that give multiple paths to a Tape Drive(/a drive in a library) ?
-pradeep
Solved! Go to Solution.
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тАО01-06-2005 07:08 PM
тАО01-06-2005 07:08 PM
SolutionHP StorageWorks ESL9000 Series Tape Libraries are having High availability features.
see http://h18006.www1.hp.com/products/storageworks/esl9000/index.html
regards,
Syam
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тАО01-06-2005 07:30 PM
тАО01-06-2005 07:30 PM
Re: high available Tape Drives
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тАО01-06-2005 09:54 PM
тАО01-06-2005 09:54 PM
Re: high available Tape Drives
Generally speaking, tape backup is not a critical-path operation - the server's daily operation does not depend on the tape unit(s) being there, like it does with disk drives, so nobody has really bothered developing a multi-pathing solution for tapes.
What are you trying to do that you would need tape drives that are so highly available? Most apps that require such are actually better suited to using something like an MSA1500 with those big ATA drives; the cost/MB is close to that of tape, and the performance is better, and it has full redundancy.
-Vince
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тАО01-06-2005 10:00 PM
тАО01-06-2005 10:00 PM
Re: high available Tape Drives
There are a lot of SAN enabled libraries available. ESL9000 is the highest configuration ou of HP libraries with SAN capabilities. The library will be connected to the media server ( where the backup software is loaded,ie;veritas,DP etc) with multiple DC cables. So dont worry about Redundancy. Any way this type of libraries are used only in a hifi setup, in which the all servers, storages and backup devices will be on a FC environment.
see an IBM product with all these facilities. (IBM 3584 Tape Library)
http://www-1.ibm.com/servers/storage/tape/3584/index.html
I have used this product and found it very much reliable.
regards,
Syam
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тАО01-06-2005 10:04 PM
тАО01-06-2005 10:04 PM
Re: high available Tape Drives
============================================
see (IBM 3584 Tape Library). It says it has got Multi-Path Architecture.
http://www-1.ibm.com/servers/storage/tape/3584/index.html
I have used this product and found it very much reliable.
regards,
Syam
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тАО01-07-2005 12:35 AM
тАО01-07-2005 12:35 AM
Re: high available Tape Drives
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тАО01-08-2005 11:23 PM
тАО01-08-2005 11:23 PM
Re: high available Tape Drives
Thus multipathing for the robotics has priority.
The drives can be split to two redundant fabrics.
Multipathing for tape drives is tricky because tapes timeouts are fatal.
A failover solution needs to be supported by the backup application as well in order to do retries and recover from timeouts.
DataProtector will support drive failover sometime this year and already supports multipathing/failover for the robotics of the ESL e-series.
In order to do that the robotics needs two independent FC ports going to two fabrics. So the e1200 FC interface has to be replaced by an e2400 interface controller.
In the attached pdf you find how this will be done!
Cheers
Peter
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тАО01-08-2005 11:25 PM
тАО01-08-2005 11:25 PM
Re: high available Tape Drives
Therefore you find pages 1-4 above and 5-8 here
Cheers
Peter
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тАО01-09-2005 06:29 PM
тАО01-09-2005 06:29 PM
Re: high available Tape Drives
Tapes Backup is slow, if Fabric fails and if drive is not reachable, entire backup need to be restarted.
if i have a virtual tape with multipathing, wouldn't Backup be easy?
please tell me if i am missing something or if you have any suggestions/inputs?
-pradeep