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тАО08-01-2007 03:05 PM
тАО08-01-2007 03:05 PM
Zoning MSL4048 Tape Library with 2 Drives
With the new unit MSL4048 each drive has a Fibre Connection / World Wide Name etc and one of the drives acts as the master LUN for the library and my questions are is it possible to load balance these drives over 2 fibre connections to 2 different switches and do I zone the tape drive WWN's as I thought I would see 3 devices in the fabric 1 for the library and 2 drives but I just see the drives.
Any help here would be greatly appreciated.
Regards, Norm
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тАО08-06-2007 07:28 PM
тАО08-06-2007 07:28 PM
Re: Zoning MSL4048 Tape Library with 2 Drives
The robotic controller is managed though one of the drives, it will appear in your host as a LUN at the same scsi address as the Master drive.
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тАО08-13-2007 09:30 AM
тАО08-13-2007 09:30 AM
Re: Zoning MSL4048 Tape Library with 2 Drives
If you are asking about connecting both ports of the drives that has already been answered, you can only have one active port at a time and if your software doesn't handle it you have to manually zone out one port. Traffic can't be load balanced across multiple ports on a single tape drive as the tape drive is sequential.
Your OS should be able to see all three devices but your switch may only see two if it just publishes information about direct connected devices.
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тАО01-29-2010 07:21 AM
тАО01-29-2010 07:21 AM
Re: Zoning MSL4048 Tape Library with 2 Drives
>If you are asking "can I connect each drive >to a different switch?" the answer is yes - >you can connect the drives to different >switches and load balance across two drives.
are you saying the same backup could write to two different drives by 2 different zones(paths)? if one path lost, could backup contiue to write to another drive?
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тАО01-29-2010 03:56 PM
тАО01-29-2010 03:56 PM
Re: Zoning MSL4048 Tape Library with 2 Drives
Whether or not your backups that would have gone to drive one can still run on drive two is dependent on how you have your backup application set up and which application you are using. Some applications can have a preferred drive and a secondary drive and write to the secondary drive if the preferred drive is down.