rusty@hplabs.UUCP (03/18/89)
Reply-to: rusty@hplabs.UUCP I suspect this is an old question. I just brought up 4.3bsd tahoe on a VAXstation 3200. When I use dump, I need to tell it both the density and length of the tape. What are these numbers for the TK70 in high density mode?
quentin@umb.umb.edu (Quentin Fennessy) (03/23/89)
Reply-to: quentin@umb.umb.edu (Quentin Fennessy) In article <87714@felix.UUCP> rusty@hplabs.UUCP writes: >I suspect this is an old question. I just brought up 4.3bsd tahoe on >a VAXstation 3200. When I use dump, I need to tell it both the >density and length of the tape. What are these numbers for the TK70 >in high density mode? A TK70 is 600 feet long, and runs at 10240 bpi density. This reminds me of a question I have had for a while- To actually fit 296 MB on a TK70, I have to lie to dump(8) (Ultrix3.0) and tell it is 4800 feet long! So, my command line is something like: dump 0uds 10240 4800 /dev/rra0a Digital has given me this as an answer. I think it is still a question. Why do I have to say 4800 feet to use 600 feet? THanks, Quentin Fennessy ITP boston, inc UMass Boston
lgl@blake.acs.washington.edu (Laurence G Lundblade) (03/30/89)
The TK70 uses serpentine recording so it records more than one track
on the tape. Four seems the right number of tracks when you multiply
it by 600 * 10240 * 12 to get 296Mb. I don't know why you have to
multiply by eight.
.....Laurence