There was a discussion back in 2014 with subject "Backups to tape
consistently under 60% tape capacity". I haven't read the whole lengthy
thread but one participant mentioned that in his case a bad cleaning
tape was found to be responsible for the capacity loss. Others reported
that they had trouble with the compression settings. My gut feeling
tells me that this is not the problem here but maybe your impression is
a different one or you get a new idea if you read through the postings.
Jens
Am 13.05.2020 um 19:40 schrieb Debra S Baddorf:
On May 13, 2020, at 11:17 AM, Stefan G. Weichinger <[email protected]> wrote:
Now look at this run of
"amtapetype -b 128k /dev/nst0"
with another tape, FUJI instead of HP:
define tapetype LTO3-fuji {
comment "Created by amtapetype; compression disabled"
length 284180096 kbytes
filemark 20803 kbytes
speed 38376 kps
blocksize 128 kbytes
}
~290 GB ... faster, and large filemarks.
Maybe that drive is somehow failing .. ?
No real ideas here, but I *DO* recall some failing drives on this list
where the symptom was like this. Tapes wouldn’t fill.
Anybody else still out there in the aether?
Deb Baddorf
Fermilab
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