Size of back up files decreases over the time

[ptp491]

Hi,
I'm using ARCserve 11 on WIn 2k3. I have 40/80 gb tapes and since a few weeks ago, when the back reaches 35gb, it asks for a new tape, then this size decreases over time, next day, when it reaches 32gb, it asks for a new tape and so on.
Any idea why it happens??
Thanks,
NF

 

[davidmichel]

There is less compressable data.

 

[ptp491]

But the tape is 40/80 gb, so up to 40gb there shouldn't be any compressing anyways.

 

[vschumpy]

or the media is damaged - you should see errors in the activity log indicating this, if this is the case.

 

[vschumpy]

also - 40/80 tapes will only get 40Gb native if they are using in a DLT 8000. If they are used with, or have previously been used with a DLT7000 then the native capacity will be 35Gb.

 

[ptp491]

I don't get any error, tapes were taking over 45gb since I started(6 months ago).
There is no error message and I never used them in any other drive( it's an internal drive).
Tapes are being formatted every time regardless of what's on them.

 

[davidmichel]

Perhaps it would help if you told us the type of tape of drive.

 

[ptp491]

Drive is Internal Dell PV-110T-DLT-vs80 .. tapes are DLT IV 40/80 gb.

 

[davidmichel]

check the database media view and look for Soft Write Errors.