SUMMARY: DLT4000 Backup: Tape keeps only 21GB instead of 40 GB

From: Alexander Oswald (
Date: Mon Jul 17 2000 - 03:34:58 CDT

Thanks for your help on the question described below.

The the 40GB tape is actually a 20 GB tape.

Thanks for your comments!

Regards, Alex.

> Again the famous question: Our tapes keep less data than assumed.
> Quantum DLT4000
> Solaris 2.7
> Solstice Backup 5.5.1
> Used device: /dev/rmt/1ubn
> Entry in /kernel/drv/st.conf:
> 1,0x36,0,0x8639,4,0x80,0x81,0x82,0x83,3;
> (many other entries were tested w/o success)
> Solstice reports that the tape capacity is 40 GB.
> While backing up, Media/Volumes.../ says, that 17 GB is written and
> 43% is used. Unfortunately, at 21 GB the software suddenly reports,
> that the volume is full! Why?
> Any hints?
> Regards, Alex.

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