leaknoil
Experienced Member
This is such a hard problem to search for on google so, I'll try here. Maybe someone will know what I am doing wrong.
I have 37 image files that made up a AT&T Unix boot tape. The original should have been a 60mb 1/4" tape. Most files are 720k but, two are 4mb. Well under the 60mb limit of a 60mb tape.
I am trying to use dd to recreate the tape. The problem is under Solaris and Linux dd to a QIC drive appears to eat up tape at a crazy rate. The 4mb file alone uses half of a 150mb tape. They will work on the AT&T box but, I can't possible fit all the files on even a 250mb length tape. I have tried all sorts of various block sizes and it doesn't seem to matter. The tape drive tears along at warp speed. I've tried a three different qic drives. a 120, a 150, and a 250. From 3 different manufacturers. All do exactly the same.
A typical attempt would be dd if=file1 of=/dev/nst0 bs=512b although I have tried block sizes up to 30k and nothing seemed to change other than what dd reported as output.
Any thoughts ?
I have 37 image files that made up a AT&T Unix boot tape. The original should have been a 60mb 1/4" tape. Most files are 720k but, two are 4mb. Well under the 60mb limit of a 60mb tape.
I am trying to use dd to recreate the tape. The problem is under Solaris and Linux dd to a QIC drive appears to eat up tape at a crazy rate. The 4mb file alone uses half of a 150mb tape. They will work on the AT&T box but, I can't possible fit all the files on even a 250mb length tape. I have tried all sorts of various block sizes and it doesn't seem to matter. The tape drive tears along at warp speed. I've tried a three different qic drives. a 120, a 150, and a 250. From 3 different manufacturers. All do exactly the same.
A typical attempt would be dd if=file1 of=/dev/nst0 bs=512b although I have tried block sizes up to 30k and nothing seemed to change other than what dd reported as output.
Any thoughts ?