Dear BUM-list:
Please excuse cross-postings.
We recently purchased a DLT1 drive for our SGI O2 running IRIX 6.5. The
DLT transfer rate to tape is only about 100 kb/sec. We have tried this
many times and always got this approximate rate whether we are transferring
directories or just plain files.
The same tape drive on my three-year old PC gives backup rates of 1-2
Mb/sec. The question is why are the backup rates on the SGI so slow?
We are using the BackUp & Restore tool on the SGI. We have tested the rate
of transfer over the SCSI line between two hard drives and found it to be
in excess of 2 Mb/sec. We have taken the SGI off the network while doing
the backup and have no other significant processes running during backup.
I would welcome any ideas on why the tape backup rate is so slow and what
could be done to improve it.
Jeff de Ropp
NMR Facility
UC Davis
One Shields Avenue
Davis CA 95616
jsderopp@ucdavis.edu
530-752-7677 office
530-752-6480 Lab
530-752-5682 Lab
530-752-3516 Fax
NMR Facility Web site URL is:
http://www.nmr.ucdavis.edu/
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