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please mount a blank media to continueHelpful Member! 

gedley (TechnicalUser) (OP)
5 May 06 7:00
I have no experience of servers so please be gentle.
We run ArcServe 2000 advanced edition v7. While doing an overnight backup on a 40GB tape (of which only 23GB of data is selected to be backed up) I have come into the office to view a (please mount a blank media to continue the backup). This to my knowledge has never happened before. it is on "full-keep archive bit". please help
Helpful Member!  Argetlam (MIS)
9 May 06 3:01
Is the 40Gb native or compressed capacity?
If it is the compressed capacity, you might indeed get problems with it trying to backup 23Gb.

Also look at the setting in the job on overwriting the media or appending to it.

With kind regards,

Argetlam

SysAdmin

gedley (TechnicalUser) (OP)
9 May 06 5:40
Hi,

the tapes are hpdds-4 and are only capable of 40gb upon compression (20 capable of 40). When the data is being written, the tape is being erased before hand so that it is completely blank (quick erase plus).I've noticed the hardware compression had been turned off and maybe this is the source of my problem. It is currently backing up so will reply again later. Could you explain why there would be problems backing up to a 40gb tape?...sorry, new to this.

Many thanks!
Argetlam (MIS)
9 May 06 6:36
Hi,

If indeed hardware compression has been turned off, this could indeed be the cause of your problems.
In getting ArcServe to backup more than 20Gb on a 20/40 dds4 tape, hardware compression MUST be enabled.
Also, the figure of 40 Gb is only a guess based on a compression level of 1:2
So, in short, normally you would be able tor write 20Gb natively to these tapes. But when hardware compression is enabled, you might be able to write 40 Gb to this tape, or less, or sometimes even more........
Compare it to creating a zip-file. It depends on what you're trying to compress. Jpeg's for example are hard to compress. Word-documents, databases and BMP's on the other hand are very good to compress.
So when you want to backup a tape full of JPEG's, you probably will never get close to filling it up to 40Gb's.

With kind regards,

Argetlam

SysAdmin

gedley (TechnicalUser) (OP)
9 May 06 17:29
Hi there,

thank you for your explanation! Turning on compression in the local settings for the drive and selecting preferences to compress data ended in a failed backup again. I've managed to reduce the data to 19.1gb now though so hopefully that's the problem solved! Thanks very much for your time and help!

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