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Re: AIT2 tape size?
2005-08-22 04:03:07
Toralf Lund wrote:
I've been meaning to ask about this for a long time:
Does anyone here use AIT2 tapes, a.k.a. SDX-50C, for Amanda backup?
What tape length are you using? [ ... ]
I've now finally run amtape - after making absolutely sure H/W
compression was off - and it said:
-sh-2.05b$ amtapetype -e 50g -t SDX2-50C-NOHWC -f /dev/tape
Writing 256 Mbyte compresseable data: 44 sec
Writing 256 Mbyte uncompresseable data: 44 sec
Estimated time to write 2 * 51200 Mbyte: 17600 sec = 4 h 53 min
wrote 1540096 32Kb blocks in 94 files in 8139 seconds (short write)
wrote 1531904 32Kb blocks in 187 files in 8236 seconds (short write)
define tapetype SDX2-50C-NOHWC {
comment "just produced by tapetype prog (hardware compression off)"
length 48386 mbytes
filemark 2818 kbytes
speed 6003 kps
}
The size reported is as you can see quite a bit below 50Gb, but close to
50000000b, so I guess the capacity is 50 salesman's gigabytes, like
someone suggested. I seem to remember writing closer to 25 *real* Gb on
an AIT-1, though, so it may still look like the capacity is less than
doubled with AIT-2, but I could be wrong...
- Toralf
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