Dan Horth wrote:
>
> Ok - don't seem to be getting much advice from this list re. my DDS-3
> Compression problems with a seagate SCSI DAT - just wondering if someone
> could point me in the direction of the right list or even an FAQ or web
> site.
Hi Dan,
[Sorry if some of this is repetitive, but I want to try and cover
everything that I've learned in my testing.]
I've run the tests here (once again) and placed 18,234,430,090 bytes of
BRU data onto a DDS-3 125m tape in a Seagate DDS-3 STD224000N drive.
for my test, I used a pair of 11.3G Maxtor IDE drives that were filled
with 38 copies of the Red Hat 5.1 sources CD and a working Red Hat 5.1
installation using 2.0.36 kernel. Here are my /etc/stinit.def settings
for the drive:
manufacturer = ARCHIVE model = "Python 04106-XXX {
scsi2logical=1 can-bsr can-partitions auto-lock
mode1 blocksize=512 compression=1 # Fixed block, compression on
mode2 blocksize=0 compression=1 # variable block, compression on
mode3 blocksize=512 compression=0 # fixed block, compression off
mode4 blocksize=0 compression=0 # variable block, compression off
}
My brutab entries for the drive look like:
#####################################################
# Seagate 4mm DAT/DDS Drive
#####################################################
/dev/st0 \
devname="4mm DAT/DDS Drive, rewind" \
size=0 bufsize=64k seek=0 \
rawtape tape shmcopy rewind autoscan
# Tape movement commands for nst0 are commented out
# on original shipment. Please read all notes on
# download file prior to using. When ready, remove
# the six (6) comment markers below to use ("#").
# And, add a continuation mark, back slash,
# to the "noautoscan" line.
/dev/nst0 \
size=0 bufsize=64k seek=0 \
shmseg=10 shmmax=256k shmall=4096k \
rawtape tape shmcopy norewind noautoscan \
eodcmd="mt -f /dev/nst0 eod" \
rfmcmd="mt -f /dev/nst0 fsf 1" \
bfmcmd="mt -f /dev/nst0 bsfm 2" \
retencmd="" \
devname="4mm DAT/DDS Drive, norewind" \
rewindcmd="mt -f /dev/st0 rewind"
Also, check dipswitch 6 and ensure that it is in the OFF position.
I don't know why you keep stopping at 12G. If you still can't get past
12G with this info, I would recommend that you contact Seagate. You may
have a drive that is failing.
For more info on the stinit.def file, see the stinit man page (you /DO/
have mt-st-0.5b, don't you?)
--
Tim Jones [EMAIL PROTECTED]
Vice President Visit our tape backup web pages:
Enhanced Software Technologies, Inc. http://www.estinc.com/
