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Overland ArcVault12 btape issues
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Post Overland ArcVault12 btape issues 
Hello List:

I have an Overland Storage ArcVault12 w/single LTO-2 drive that's
giving me issues when running btape fill.

The unit is presently at a remote site. I don't think it is related but
just to be complete, upon arrival and powering up the ArcVault12
exhibited an "identity crisis" and thought it was an ArcVault24 w/2
drives. Tweaking a setting in RMU remedied this but I wondered about
it because it knew it was an ArcVault12 when I shipped it. Techs on
other end say box did not exhibit signs of damage or abuse during
shipping. I ran through the RMU diagnostics and all tests succeeded.

The backup server the unit is connected to is a 1U Tyan B5151, running
FreeBSD 6.2-RELEASE-p5, GENERIC kernel, i386 bits. SCSI controller is a
LSI-20320 (U320, PCI-X), wh/uses the mpt driver on FBSD.

Bacula version is bacula-server-2.0.3 built from ports w/o any special
flags passed during make.

Relevant bacula-sd.conf config:

Autochanger {
Name = Autochanger
Device = Drive-1
Changer Command = "/usr/local/etc/bacula/mtx-changer %c %o %S %a %d"
Changer Device = /dev/pass1
}

Device {
Name = Drive-1 #
Drive Index = 0
Media Type = LTO-2
Archive Device = /dev/nsa0
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
# btape test results advise tweaking thusly...
Hardware End of Medium = No
Fast Forward Space File = No
BSF at EOM = yes
Backward Space Record = No
}

Addition of above tweaks and btape test completes w/o complaint.

When doing a btape fill, however, the tape fills but then btape just
waits forever, as evidenced here:

btape: btape.c:2343 Last block at: 296:10031 this_dev_block_num=10032
btape: btape.c:2377 End of tape 297:0. VolumeCapacity=203,956,687,872.
Write rate = 19749.8 KB/s Done writing 0 records ...
Wrote state file last_block_num1=10031 last_block_num2=0

15:46:54 Done filling tape at 297:0. Now beginning re-read of tape ...
15-Jun 15:47 btape: 3301 Issuing autochanger "loaded? drive 0" command.
15-Jun 15:47 btape: 3302 Autochanger "loaded? drive 0", result is Slot
1. 15-Jun 15:47 btape: 3301 Issuing autochanger "loaded? drive 0"
command. 15-Jun 15:47 btape: 3302 Autochanger "loaded? drive 0", result
is Slot 1. 15-Jun 15:48 btape: Ready to read from volume "TestVolume1"
on device "Drive-1" (/dev/nsa0). Rewinding.
Reading the first 10000 records from 0:0.
10000 records read now at 1:5084
Reposition from 1:5084 to 296:10031

Any hints what might be causing this? I tested the ArcVault prior to
shipping with an old Adaptec 2940 SCSI Card and to the best of my
recollection things "just worked".

I read in Bacula docs:

"Figure out how to configure your SCSI driver to keep track of
the file position during the MTEOM request. This is the preferred
solution."

versus setting "Hardware End of File = no" and wonder if this might
perhaps be mpt scsi driver related? Anyone else using an ArcVault
w/FreeBSD can confirm a working configuration?

TIA :)

--
Best regards,

Ken Gunderson
GPG Key -- 9F5179FD

"Never hold discussions with the monkey when the organ grinder is in
the room." - Sir Winston Churchill

Post Overland ArcVault12 btape issues 
On Fri, 15 Jun 2007 15:03:28 -0600
Ken Gunderson <kgunders < at > te...> wrote:

[snip]

Relevant bacula-sd.conf config:


Autochanger {
Name = Autochanger
Device = Drive-1
Changer Command = "/usr/local/etc/bacula/mtx-changer %c %o %S %a %d"
Changer Device = /dev/pass1
}

Device {
Name = Drive-1 #
Drive Index = 0
Media Type = LTO-2
Archive Device = /dev/nsa0
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = yes;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
# btape test results advise tweaking thusly...
Hardware End of Medium = No
Fast Forward Space File = No
BSF at EOM = yes
Backward Space Record = No
}

Following up on myself here....

If I change conf above to comment out Fast Forward Space File = No then
btape fill succeeds.

Note that previously I'd read in bacula btape docs:

"When I set Hardware End of Medium = no and Fast Forward Space File =
no file positioning was very slow on my LTO-3 (about ten to 100
minutes), but

with Hardware End of Medium = no and Fast Forward Space File = yes, the
time is ten to 100 times faster (about one to two minutes). "

I'm using LTO-2 drive but had waited 3-4 hours w/the Fast Forward Space
File = No setting so figured, perhaps mistakenly, that that should have
been enough??

--
Best regards,

Ken Gunderson
GPG Key -- 9F5179FD

"Never hold discussions with the monkey when the organ grinder is in
the room." - Sir Winston Churchill

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