Re: Tar block size

Hello,

śr., 28 sie 2024 o 07:47 [email protected] <
[email protected]> napisał(a):

> Dear all,
>  I've been using bacula v. 15.0.2 for a few weeks. I also installed
> Bacularis v. 3.2. My server has a LTO8, this drive works much better if I
> change the block size ("-b 512").
>

There are special parameters to force Bacula tu use required block sizes:
- Minimum block size = <size-in-bytes>
- Maximum block size = <size-in-bytes>
please check documentation:
https://www.bacula.org/15.0.x-manuals/en/main/Storage_Daemon_Configuratio.html#SECTION0025300000000000000000

But I do not understand why setting a block size to 512 bytes would do any
better in this case.


> I would like to modify the bacula-sd.conf file like this:
> Device {
> ...
> ArchiveDevice = "/dev/nst1 -b 512"
>

I'm pretty sure this kind of configuration is not supported and according
to documentation (and my Bacula developer experience) this Archive
Device = <name-string>,
which:
The specified name-string gives the *system file name* of the storage
device managed by this storage daemon. This will usually be the device file
name of a removable storage device (tape drive), for example /dev/nst0 or
/dev/rmt/0mbn.
So, unless you have a device file named "/dev/nst1 -b 512" it simply won't
work.

....
> }
> What do you think?
>

Bacula does not use TAR for saving on the tapes, so your suggestion is
invalid.
I hope this helps.

best regards
-- 
Radosław Korzeniewski
[email protected]

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