Last week Rich Sudlow asked:
> Could someone please send me the parameters which work
> with their 5 GB 8MM tape drive on a Sun. The values which
> have been reported from fms (I've run it 3 x on different
> drives with different tapes) seem to be a ways off for some
> reason and I keep hitting the EOT.
> Thanks
> Rich Sudlow
> Office of University Computing
> University of Notre Dame
> [EMAIL PROTECTED]
Ken Sieczkowski responded :
> 2112M 2430K /dev/nrst0 0
On the Sun to use the drive at the high density requires it
to be addressed as /dev/nrst8 (8+ its address) to use the EXB-8500 format.
If you use the /dev/nrst0 it will use the EXB-8200 format. See the
man page "st(4)". Ken's numbers look like the 2GB numbers we have
on one of our tapes.
On our 5GB tape, fms reported:
4,939,907,072 bytes
96,432 bytes for EOF
On our 2GB tape fms reported:
2,345,779,200 bytes
2,083,672 bytes for EOF
So based on the conservative formula Transarc recommends we used:
4240M 105K /dev/rst8 0
2G 2100K /dev/rst1 1
These numbers may vary at your site based on the type of tapes
and maybe the drive as well.
You said you keep hitting the EOT. Did you mean you hit the EOT when
running fms our when doing a backup? Fms should always hit the EOT.
Backup should not.
I would like to see Transarc change backup so that it could
go all the way to the end of the tape and recognize the EOT.
I am waiting almost 15% of the tape based on their formula.
Douglas E. Engert
Systems Programming
Argonne National Laboratory
9700 South Cass Avenue
Argonne, Illinois 60439
(708) 252-5444
Internet: [EMAIL PROTECTED]
