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LTO4 tape drive compatibility

This is the current setup:-

We have a server 2003 std hosting two VMware images (also both server 2003 std) on VMware server 2.0.  Connected to the host is a SAS LTO4 tape drive (Dell) and it is installed correctly and working on the VM images.  We have performed a test restore on one of the VM images using a LTO3 tape and it restored with no problems.  we then tried to restore to the other VM image using an LTO4 tape.  NTbackup recognizes the device and it sees there is a tape in the drive but when we try to mount it it comes up with an error saying that it cannot find the tape and when we check the drive, the tape has indeed been ejected.

We have contacted Dell who say it is a software issue but we can't find any reason why this is happening with the LTO4 tape in an LTO4 drive!

Any help would be hugely appreciated.
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Tizzy22
Asked:
Tizzy22
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1 Solution
 
WakaMangCommented:
Did you try to do an update for the drivers, and also make sure you're windows 2003 is completly updated. The LTO4 shouldn't be a problem.  Are you using the tapedrive localy or in a VM?
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Paul SolovyovskyCommented:
Are you trying to backup the virtual machines when they're running?  If so this will not work correctly many times since it is trying to backup an open file which in this case is a vmdk and/or virtual memory files.  To backup the virtual machines you'll need to run a script to shutdown the VMs, backup, and start them back up.

A good baseline is to shutdown the VMs, backup, and restore.  If this works you know that it is because you're backing up the VMs while they're running.  
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Tizzy22Author Commented:
The servers are fully up to date with all new drivers and updates.  What we are trying to do is to restore to the VM image from a backup.  The tape drive is installed locally and is also installed on the VM image that we're trying to restore it too.  The VMi image can see the tape but it is having issues loading the set list.  It loads an LTO3 tape fine, its just the LTO4 tape it seems to be having an issue with.  This is the second tape we have tried with exactly the same result.
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Tizzy22Author Commented:
we've decided to buy a new server dedicated to this backup so I guess we'll never know the reason why it didn't work!!

Thanks for the input though.
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