Am 12.05.20 um 08:34 schrieb Stefan G. Weichinger:
> backups run to a LTO3 tape (remember, 400 GB uncompressed space per
> definition)
I ran amtapetpye and only get half of the expected capacity!
why that ...
$ amtapetype -t LTO3_2020 -f /dev/nst0
Checking for FSF_AFTER_FILEMARK requirement
Applying heuristic check for compression.
Wrote random (uncompressible) data at 27134018.0645161 bytes/sec
Wrote fixed (compressible) data at 27578838.0327869 bytes/sec
Compression: disabled
Writing one file to fill the volume.
Wrote 209430315008 bytes at 27608 kb/sec
Writing smaller files (2094301184 bytes) to determine filemark.
define tapetype LTO3_2020 {
comment "Created by amtapetype; compression disabled"
length 204521792 kbytes
filemark 0 kbytes
speed 27608 kps
blocksize 32 kbytes
}
# LEOM is not supported for this drive and kernel
amanda@amanda ~ $ mt -f /dev/st0 status
SCSI 2 tape drive:
File number=102, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x44 (LTO-3).
Soft error count since last status=0
General status bits on (81010000):
EOF ONLINE IM_REP_EN
amanda@amanda ~ $ cat /proc/scsi/scsi
Attached devices:
[..]
Vendor: HP Model: Ultrium 3-SCSI Rev: Q51D
Type: Sequential-Access ANSI SCSI revision: 05
Maybe they bought LTO2 tapes, I check that asap.
