Interactive and tape drives
John G. De Armond
jgd at rsiatl.UUCP
Sun Oct 29 14:36:20 AEST 1989
In article <1989Oct27.184405.3493 at rand.org> edhall at rand.org (Ed Hall) writes:
^This is true for all UNIX systems I know of, including Interactive's:
^the buffered (block) version of a device will not return a reliable
^end-of-media. You must use the raw (character) device. It's easy
^to see why--the system can have several buffers already queued when
^the EOM hits. Even though the user successfully ``wrote'' those
^buffers, they'll never make it onto the tape.
100% true. The problem is that the interactive wantek driver does not
supply a raw interface. I'm convinced I have to count bytes to
reliably handle multi-tape volumes.
John De Armond, WD4OQC | Manual? ... What manual ?!?
Radiation Systems, Inc. Atlanta, GA | This is Unix, My son, You
emory!stiatl!rsiatl!jgd **I am the NRA** | just GOTTA Know!!!
More information about the Comp.unix.i386