I'm using 40GB DLT tapes (according to the label). Despite what the comment produced says, I used the non-compressed device. I didn't give it an estimate for the tapesize.Despite using the non-compressed device, I believe the comment :-)
Probably solaris, isn't it? You did modify the /kernel/drv/st.conf as
indicated in "man st"?
You loose more than 10% of the tape capacity if using both hardware
and software compression.
And amtapetype would finish faster when given a more accurate speed
figure, like " amtapetype -e 40g ..." (speed is actually not used in the rest
of the package, so it doesn't matter).
Writing 256 Mbyte compresseable data: 34 sec Writing 256 Mbyte uncompresseable data: 105 sec WARNING: Tape drive has hardware compression enabled Estimated time to write 2 * 1024 Mbyte: 840 sec = 0 h 14 min wrote 1102644 32Kb blocks in 3372 files in 21817 seconds (short write) wrote 1101228 32Kb blocks in 6756 files in 29828 seconds (short write) define tapetype HP-DLT1e { comment "just produced by tapetype prog (hardware compression on)" length 34499 mbytes filemark 13 kbytes speed 1399 kps }
