Date: Tue, 5 Dec 2000 09:37:40 -0800 (PST) From: "Scott B. Gale" <scott@doheny.beach.net> To: questions@FreeBSD.ORG Cc: Dan Busarow <dan@dpcsys.com> Subject: rdump to Travan 8GB Cartridge Message-ID: <Pine.BSF.4.21.0012041724570.30253-100000@doheny.beach.net>
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Maybe someone out there has run into this problem before.
I am trying to to use rdump to backup a file system on one machine to a
SCSI tape drive on another machine on the same network. The first machine
(whose files I'm backing up) is running FreeBSD 4.1. The second (which has
the SCSI tape drive) is running FreeBSD 2.2.8. The tape is a Travan 8GB
Cartridge (4GB uncompressed). The tape specifications are as follows
according to the manufacturer:
Travan 8 GB Product Specifications:
Specification Travan 8GB Cartridge
UPC: 0-51111-46214
Capacity
Uncompressed: 4 GB
Compressed: 8 GB
Data Transfer Rate*
Uncompressed: 567 KB/second
Tape Length: 740 ft.
Tape Coercivity: 900 Oe
Tracks: 72
Tested at: 50,800 ftpi
Preformatted: QIC-170
My first attempt was to compose the following command:
/sbin/rdump -0dsfu 50800 740 root@fs.myco.com:/dev/rst0
/dev/rad0a
The density and tape length parameters were rejected as invalid and no
parameters I could come up with worked. If I left the parameters out the
program predicted it would take scores of tapes to complete the backup
when two tapes should be able to handle the 6 gigabytes I'm trying to
backup.
I decided to try the "autosize" -a switch and came up with this
command:
/sbin/rdump -0au -f root@fs.myco.com:/dev/rst0 /dev/ad0s1f
But it always returns the following results even with different tapes:
DUMP: 62.91% done, finished in 1:07
DUMP: write: Input/output error
DUMP: write error 3988030 blocks into volume 1
DUMP: Do you want to restart?: ("yes" or "no")
Judging from the amount of progress I'd say that the tape is simply at its
end, the tape itself is good.
I've also tried splitting up the parameters various ways (e.g., -0 -a -f
/dev/rst0) and specifying the slice to backup by different names (e.g.,
/usr instead of /dev/ad0s1f) but have had no success.
If anyone has had success with rdumping to Travan 8GB tapes I'd sure
appreciate it if they let me know how they did it!
Thanks in advance for any replies,
Scott B. Gale
Dana Point Communications
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