Gary,
First it's not a disk so change
RandomAccess = no
The largest setting for block size is 2M
Maximum Block Size = 2M
The setting for "Maximum File Size" controls the EOF marks on the tape.
Each of these is a record in the bacula database which works with
positioning the tape for recovery operations. Your 5GB may be fine -
testing may prove that another setting is best. The tape does stop to
make the mark.
You may also want to take a look at the "Maximum Network Buffer Size" -
32K is the min, but the value depends on what and where your clients and
network are. You may have already worked with this to come up with your
setting.
I don't see any indication of using spooling, you may have those settings
elsewhere. This should almost always be done with tape.
Patti Clark
Linux System Administrator
R&D Systems Support Oak Ridge National Laboratory
On 4/13/15, 4:56 AM, "Gary R, Schmidt" <grs AT mcleod-schmidt.id DOT au> wrote:
>Hi,
>I am starting the process of replacing an existing but defunct Bacula
>(3.0.3) environment with a newer tape autoloader, and, of course, the
>latest Bacula.
>
>It broke some time ago (don't ask), so there is no upgrade happening
>here, it's new bits and pieces, in part, using the same hardware for the
>director.
>
>I am replacing a SCSI HP 1/8 G2 LTO-4 autoloader with an FC HP 1/8 G2
>LTO-6 autoloader, and I wonder just what settings I should use?
>
>The LTO-4 was configured like this:
> Device {
> Name = LTO-4
> Media Type = LTO-4
> Archive Device = /dev/rmt/0cbn
> AutomaticMount = yes; # when device opened, read it
> AlwaysOpen = yes;
> RemovableMedia = yes;
> RandomAccess = yes;
> Maximum Network Buffer Size = 262144
> Maximum Block Size = 262144
> Maximum File Size = 5GB
> Changer Command = "/opt/local/bacula/scripts/mtx-changer %c %o %S
>%a %d"
> Changer Device = /dev/changer
> Autochanger = yes
> # Enable the Alert command only if you have the mtx package loaded
> Alert Command = "sh -c '/opt/local/sbin/tapeinfo -f %c |grep
>TapeAlert|cat'"
> ## If you have smartctl, enable this, it has more info than
>tapeinfo
> ## Alert Command = "sh -c 'smartctl -H -l error %c'"
> }
>
>And I wonder what I should change to better use the increased speed and
>capacity of the LTO-6.
>
>Almost by reflex I want to change the Maximum Block Size, and Maximum
>File Size, but to what?
>
>When I get everything built I will play with the "speed" command in
>btape, and I have a fair bit of reading to do!
>
>Oh, I've tested it all using the 3.0.3 btape, so I know that the
>hardware works, but I would like it to work optimally. (And yes, I will
>have spooling turned on.)
>
> Cheers,
> Gary B-)
>
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