need help with tape backup

[Darryl Cook]

   Well I have the compression working now with the dump -z2 command. 
What I have learned though is this:

   It works with AIT-2 tapes but not with AIT-3 tapes.  The unit is a
SDX-700V.  It supposedly works with AIT-3 tapes.   Any suggestions?

   darryl

   Quoting Adam Williams:

>        have you tried doing mt -f /dev/st0 compression on
>
> or using software compression?  tar -jtvf /dev/st0 /root /home
/sbin
> /bin /mnt /opt /var /etc
>
> etc...
>
> Darryl Cook wrote:
>
>    I need some help with tape backups.  System specs are:
>
>    PowerEdge 2850   running Redhat AS v4.
>
>    Sony Lib/81  AIT-3,  SDX-700V  tape drive.
>
> problem:   Im only getting around 75-85 gb on a tape before it runs
> out of room.  It apparently isnt compressing the data.  Im using
the
> AIT-3  100/250gb tapes so we should see much more than that.  Ive
> tried several things including the following:
>
>    dump -j2  and dump -z2 commands but get errors it looks like
right
> before end of the dump.
>
>    Error with sense data:sense key Medium Error   and Additional
> sense: Cartridge fault.
>
> Ive also tried setting mt -f <device> setblk 0  command but no
better
> luck.
>
>    Anyone have any experience with this tape drive....suggestions
> appreciated.
>
>    darryl cook
>
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