We have a StorEdge L8 with LTO-1 tapes that I use for nightly backups. Unfortunately the backup times are slower then I would like
ufdump 0uf /dev/rmt/0n /usr/data1-gets me only2797 KB/sec
Even setting the block size using ufdump 0ubf 512 /dev/rmt/0n- yields the same result
Any ideas or help will be greatly appreciated?I even isntalled patch 113277-32
The speed of the dump may be limited by the number of files you have - not just the amount of space used.
Is the L8 the only thing on the bus? Where/how are the disks attached.
You can get a reasonable idea of where your bottleneck lies by running 'iostat -zxn 10' whilst your dump is running.
Okay, here is the result of the iostat during an ufsdump.Looks like an IO problem going to the tape drive?Any help would be appriciated
r/sw/skr/skw/s wait actv wsvc_t asvc_t %w %b device
0.02.80.018.4 0.0 0.00.00.000 d0
0.02.80.018.4 0.0 0.00.014.201 d1
0.02.80.018.4 0.0 0.00.914.301 d2
319.54.4 2540.029.2 0.0 0.70.02.20 42 c4t0d0
0.00.30.00.2 0.0 0.00.05.400 c1t0d0
0.03.20.018.8 0.0 0.00.013.301 c1t1d0
0.065.20.0 2086.4 0.0 0.70.011.40 74 rmt/0
