I'm benchmarking a tape drive, and when I run
Code:
time tar cvf /dev/st0 /mnt/junk1
, where junk1 is a 250 MB file, it takes 43 seconds. Then when I run
Code:
time tar rvf /dev/st0 /mnt/junk2
, where junk2 is also 250 MB, it takes like 1m 15 secs. Is it normal for appending to take so much longer than the initial? Also, any ideas why this new tape drive takes so long to transfer 250 MB? I'm looking into different block sizes, so ideas besides that are welcome (unless you have a recommended block size for an IBM Ultrium LTO 4
).