Hello,
On 1/7/2006 7:14 PM, Chris Hunter wrote:
Hi again,
Here is the btape output from my second ultrium-1 drive (Drive-2). The
drive is part of an autochanger, but I am talking to the drives
directly for these btape tests.
This drive doesn't hang, like Drive-1. However, it still fails on the
"btape fill simple" command after writing ~2GB. The last block does not
appear to be properly written to tape. Subsequently, the read of this
last block fails.
Since I am having similar problems with two drives with different tapes,
I suspect there is a problem in my configuration (opposed to
hardware/media problems).
Some questions:
i) Can you please post your bacula-sd.conf & bacula-dir.conf settings
for LTO drives (especially HP Ultrium-1 drives) plus additional st
options ?
Even though I don't operate any LTO drives here - you should supply the
versions of Bacula used and OS details. Otherwise, most of what other
people might send will not be very useful for you.
ii) Should I set the MaxVolume Size ?
With tapes, usually not.
iii) Suggestions for HBA settings (eg command queuing, drive buffers,
etc) ?
Again, which OS? Usually and in my experience, you don't need to
explicitly set that sort of stuff...
Thanks,
My bacula-sd.conf section:
Device {
Name = Drive-2 #
Drive Index = 1
Media Type = LTO-1
Archive Device = /dev/nst1
AutomaticMount = yes; # when device opened, read it
AlwaysOpen = no;
RemovableMedia = yes;
RandomAccess = no;
AutoChanger = yes
Is this really necessary? Either ou use 1.38 in which case the relevant
configuration is moved, or you haven't included the necessary changer
command.
LabelMedia = yes;
# Enable the Alert command only if you have the mtx package loaded
Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
# SpoolDirectory=/.tape_spool
# Maximum Spool Size = 20G
# Maximum Open Wait = 30 seconds
}
[EMAIL PROTECTED] bin]# ./btape -v -d 100 /dev/nst1
...
Begin writing Bacula records to tape ...
Wrote blk_block=5000, dev_blk_num=4999 VolBytes=322,495,472 rate=1528.4
KB/s
Wrote blk_block=10000, dev_blk_num=9999 VolBytes=645,055,424 rate=1532.2
KB/s
Wrote blk_block=15000, dev_blk_num=14999 VolBytes=967,615,368
rate=1531.0 KB/s
Flush block, write EOF
btape: block.c:420 return write_block_to_dev no data to write
btape: dev.c:1521 weof_dev
Wrote blk_block=20000, dev_blk_num=5000 VolBytes=1,290,175,312
rate=1530.5 KB/s
Wrote blk_block=25000, dev_blk_num=10000 VolBytes=1,612,735,264
rate=1531.6 KB/s
Wrote blk_block=30000, dev_blk_num=15000 VolBytes=1,935,295,208
rate=1531.1 KB/s
Flush block, write EOF
btape: block.c:420 return write_block_to_dev no data to write
btape: dev.c:1521 weof_dev
Wrote blk_block=35000, dev_blk_num=5000 VolBytes=2,257,855,160
rate=1527.6 KB/s
07-Jan 11:19 btape: btape Error: block.c:538 Write error at 3:9049 on
device "Drive-2" (/dev/nst1). ERR=Input/output error.
btape: block.c:550 === Write error. fd=3 size=64512 rtn=-1 dev_blk=9049
blk_blk=39049 errno=5: ERR=Input/output error
btape: dev.c:1521 weof_dev
07-Jan 11:19 btape: btape Error: Error writing final EOF to tape. This
Volume may not be readable.
dev.c:1553 ioctl MTWEOF error on "Drive-2" (/dev/nst1). ERR=Input/output
error.
btape: block.c:688 WEOF error.
...
I don't know the reasons, but I suspect there is definitely something
wrong - the data transfer is much too slow for a LTO device. 1.5
MBytes/second is really too slow. LTO-1 should write with much higher
speeds.
I suspect a SCSI problem, something like faulty termination, wrong
cables and resulting slower transfers than possible, or a too high
simultaneous use of the SCSI bus, for example because you've got your
disks attached to it, too.
If you're working under linux, the command 'cat /proc/scsi/scsi' might
tell about some of the reasons.
Arno
--
IT-Service Lehmann [EMAIL PROTECTED]
Arno Lehmann http://www.its-lehmann.de
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