Hello,
Last week I managed to get another drive (LTO4 SAS HP 1760), and it seems it's
drive related.
So far I tested 4 tapes in the LTO4 drive, and all tapes are fully written
written (407GB) and with "full" speed (~55MB/s). Verify volumetocatalog is OK,
I haven't restored yet, but will test
Hi Udo,
it's not only about decreasing write-speed, but also about decreasing capacity.
Also, when a good tape follows a bad tape, write speed is back again around
40MB/s. A tape normally keeps it's write speed over the full length of the tape
(be it either ~20MB/s or ~40MB/s).
to the hardwa
Hi Tim,
if dd use the full speed instead of bareos, whats about an IO-limitation
on the source - the spool-disk?
In your example, the first 50-gb spoolfile was transferred with 40MB/s
the later ones with 35MB/s.
Does the spool-disks was filled with other backup-jobs (writes) during
the despooling?
Hi Kai,
I thought about disabling hardware compression, but doing that in a permanent
way, I think I would have had to re-install a OS which runs LTT (other ways via
Linux seemed to me not conclusive enough, or I didn't find that information).
I also read at numerous occasions that >= LTO-2 dri
Hi Kai,
thanks, the HP LTT tools contain a diagnostic test (my drive is a HP Ultrium920
SCSI LTO3 drive). There should also be a 5-second self test on every power up.
So far, this always succeeded (I never got a error message on the autoloader
display or in the logs).
I remember, that I did th
Hi Tim,
hmmm. "Hardware compression, (software) encryption, and software
compression"
That's probably overkill. Could you disable hardware compression? This
can slow down backup if the data is encrypted (and compressed).
Stefan
Am 22.08.2018 um 09:40 schrieb Tim Banchi:
> Hi Stefan,
>
> yes,
Hi Tim,
does the drive have a self test function in the firmware? If so, try it.
If not, maybe there is a test software from the vendor available?
Best regards,
Kai
Am 22.08.2018 um 09:40 schrieb Tim Banchi:
Hi Stefan,
yes, I use newly purchased ones when the autoloader/drive requested it.
Hi Stefan,
yes, I use newly purchased ones when the autoloader/drive requested it. I got
clean requests when getting I/O errors with really bad tapes (which I then
dumped right away). Otherwise there have been so far no cleaning requests
(which is normal to my experience), and the status of the
Hi Tim,
only a idea... did you use cleaning tapes?
Regards
Stefan
Am 21.08.2018 um 15:46 schrieb Tim Banchi:
> Hello,
>
> I'm using Bareos 17.2 with the following pool, and device configuration:
>
> Pool {
> Name = tape_automated
> Pool Type = Backup
> Recycle = yes
Hello,
I'm using Bareos 17.2 with the following pool, and device configuration:
Pool {
Name = tape_automated
Pool Type = Backup
Recycle = yes # Bareos can automatically recycle Volumes
AutoPrune = yes # Prune expired volumes
#Recycle Oldest Volu
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