buchholz@ese3.ese.ogi.edu (Don Buchholz) (01/02/91)
Help! I've seen (and saved) 5 articles on rdump'ing to Exabytes tapes, but I'm still unable to get a proper dump to the QIC-150 tape drive on our Sun 4/300 (SunOS 4.0.3). As far as I can tell, the rdump command on our RS/6000 (AIX 3.1 w/3001) completely ignores the "-l" option. It doesn't matter which of the two following commands I use: rdump -c -l 290000 -0u -f ese3:/dev/nrst8 /usr rdump -c -l 2900000 -0u -f ese3:/dev/nrst8 /usr only about 10% of the tape in the cartridge is used before I am prompted for the next tape. I thought -l would specify the capacity of a tape in 512-byte blocks (290000*512 = 148.48 Mbytes). I figured if that was wrong at least multiplying the factor by 10 would use more tape -- it didn't :-(. Referring to the previous postings and the SunOS man pages concerning the "-s" and "-l" options to rdump, I tried the following: rdump -0cu -s620 -d20000 -f ese3:/dev/nrst8 /usr assuming that -s was specified in feet and -d was bytes per inch this would give me 620(ft)*12(in/ft)*20000(bytes/in) = 148,800,000 = 148.8 MB. This only used up one-half of the tape! Can anyone give me the correct arguments to use for "-s" and "-l"? Can anyone tell me why the "-l" option seems to be broken? Will I need any furthur info to put multiple filesystems on a single tape, other than specifying the non-rewinding device on the Sun? Thanks in advance, ------------------------------------------------------------------------------- Don Buchholz "I wish I'd never gone to Bangkok ..." Oregon Graduate Institute "I wouldn't be so sad I wasn't there now." buchholz@ese.ogi.edu -- J. DeWitt (1985) -------------------------------------------------------------------------------