I'm using a DLT7000 drive and DLT IV tapes (35/70) and basically decided to
start fresh and start my backups for real after testing and getting things
working.

I toasted the database tables etc, and re-labled a couple of tapes:

1) mt -f /dev/nst0 status (verify density)

# mt -f /dev/nst0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x84 (DLT 35GB uncompressed).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

2) Get rid of the existing label

# mt -f /dev/nst0 weof

3) use label command to add the media again (in my case BRT000 and BRT001)

Ok so far so good, this is what I did the first time with no issues and the
first time the tape filled to about 33GB. This tim when I did it the backups
cabbed with an error of "No apendable media found" and the tape was full at
about 1.3 GB. I did everything all over again but this time before I went
through everything I actually erased the tape:

# mt -f /dev/nst0 erase

2.5 hours later I relabeled as lited above. Result ... after some backups
again it went to 9.3G and error'd out again. What could I possibly be missing?
Are there other files I should remove when starting from scratch or is there
another way to debug this?

The media is new and the drive has been working fine for a while now so I'm
not sure what it could be, maybe a block size issue? Currently it looks like
it's variable and set to 0:

Tape block size 0 bytes. Density code 0x84 (DLT 35GB uncompressed).

Should I be running HW compression?

Thanks everyone!!

--
Lonny
-- 
"To mess up a Linux box, you need to work at it; to mess up your Windows box,
you just need to work ON it."


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