Restore Time

I am running ArcServe to recover some data. I am recovering C and D drive from a system. When performing a restore the transfer rate starts with 100MB/sec....when the restore process hits around 34% the transfer rate starts dropping from 100MB/sec to 60MB/sec to 10MB/sec and then 2MB/sec. I have no idea why and the restore seems to be taking days and the restore completion is always 34%. The tape drive is an Ultrium 230 and the tape is an ultrium 1 tape.
Any help would be appreciated.
Thanks
fred2k3Asked:
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KorbusCommented:
My guess is the transfer rate actually stops, the reason you see it drop slowly is because it's proably computing some average.

Do you see anything in the applog, or the arcserve logs?
Are you attemtping to restore over files that are open and in use?
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fred2k3Author Commented:
I am restoring files (overwriting existing ones). The files are not open.
Unfortunately there is nothing in the logs...the only information i get is a transfer rate and the % of completion.
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Thomas RushCommented:
So you're stuck, for some reason.  I agree with Korbus that it sounds like there is some file which is locked and can't be overwritten, so the process is getting stalled.

If I were in your situation and could, I'd try restoring to a different location (new directory on the same disk, or free space on the network somewhere) and once the data was restored, copy it to the correct location.

Or, consider restoring to a bare disk.
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KorbusCommented:
Not sure about arcServe, but with backup-exec, when doing distaster recovery, you need to install windows, and backupsoftware to a different directory than where they were originally installed, so that the restore software can write to the windows directory without it being in use.
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fred2k3Author Commented:
This is just recoverying the a non-system drive...... when using a backup tapes that i 6 months older the recovery of that drive works.
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KorbusCommented:
Try stopping any services that may be using files on the drive you are restoring to.
Can you determine what files are in the current backup that are NOT in the backup from 6 mo ago?
Have you tried restoring to a different location, as SelfGovern suggested?  If you redirect your restore to a newly created directory, you will ensure you are not trying to overwrite an open file.

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fred2k3Author Commented:
I've tried to bypass the directory i am having issues with an the restore time doesn't seem to be dropping....so does this mean that there is a problem with the tape or files or another issue?
Thanks
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Thomas RushCommented:
It appears there is a problem with a file in that directory being locked.   It *may* be an issue with a corrupt file on the backup tape, but I'm guessing it's a locked file problem.
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Thomas RushCommented:
Wait -- I think I misread you.    If the job is not going to completion and you are restoring the files to a new location, then you probably have a corrupt tape.  Try cleaning the tape drive.  Sometimes even using a different tape drive to read the tape might help.

What brand of tape drive are you using?  HP has some pretty complete diagnostics for drives and media available through its free LIbrary and Tape Tools -- other vendors might have similar.
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fred2k3Author Commented:
I'm using an HP tape in an HP ulttrium tape drive. I have tries a different HP ulttrium tape drive but that hasn't helped. The problem occurs at the same point. I'll try the diagnostics on the media to see what result it comes up with. Have you got any more suggestions on what i can do?
Thanks
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Thomas RushCommented:
Be careful; some of the tests will overwrite/destroy the data on the tape.
My guess is that this tape will not give you a successful restore without extraordinary measures, but I could be wrong.

By "extraordinary measures" I mean one of the data recovery services.  Not cheap.
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