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To make it easier to find information about HPE Storage products and solutions, we are doing spring cleaning. This includes consolidation of some older boards, and a simpler structure that more accurately reflects how people use HPE Storage.
Tape Libraries and Drives
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DLT8000 > DLT7000 compatibility

Megassini
Occasional Contributor

DLT8000 > DLT7000 compatibility

I need to make backup on a DLT8000 readable by a system with a DLT7000. The backup is done by OBII A.3.0 of the db (Informix).
5 REPLIES
Volker Borowski
Honored Contributor

Re: DLT8000 > DLT7000 compatibility

If capacity is not critical, you should be able to use DLT III Media. This should be compatible to both of these.
Hope this helps.
Volker
Alexander M. Ermes
Honored Contributor

Re: DLT8000 > DLT7000 compatibility

Hi there.
Should not be a problem.
Don't forget to import the tape in OB.
Rgds
Alexander M. Ermes
.. and all these memories are going to vanish like tears in the rain! final words from Rutger Hauer in "Blade Runner"
Megassini
Occasional Contributor

Re: DLT8000 > DLT7000 compatibility

The use of DLT III type should be critical because the db is of very generous dimension.
OBII on DLT7000 recognize as "blank" a DLT8000 written tape. I've tried to initialize a DLT tape on a DLT7000 system. So I've tried to backup on a DLT8000 system over that tape. And finally I've tryed to read the tape in OBII with a DLT7000 with no success.
So the problem is still not solved.
Darrel Louis
Honored Contributor

Re: DLT8000 > DLT7000 compatibility

Make sure you have the latest stape patch installed.
Also check in the following file for the density used by each tape device:
/usr/include/sys/mtio.h
DLT 7000 uses 85937 bpi and 52 tracks.

mksf -C tape -I 6 -b 133 -c1
/dev/rmt/DLT_85937_52c

man mksf
Darrel Louis
Honored Contributor

Re: DLT8000 > DLT7000 compatibility

Hi,

Is your problem solved now.
Check the following patch description aswell
PHCO_21596
# mksf -v -H 8/8.3.0 -d stape -b DLT_81633_64c /dev/rmt/DLT4000_compressed
# mksf -v -H 8/8.3.0 -d stape -b DLT_81633_64 /dev/rmt/DLT4000_uncompressed

Writing to the drive using these new device files will allow to read the tapes
on the DLT 4000 drive.

# /sbin/mksf -v -H 8/8.5.0 -d stape -b DLT_85937_52 -a /dev/rmt/DLT_35G
# /sbin/mksf -v -H 8/8.5.0 -d stape -b DLT_85937_52 -a -c /dev/rmt/DLT_70G

Writing tapes in the format readable for DLT-7000.