Hello All,
This is a follow up on the saga of the LSI Logic card used as a controller for
an ADIC SCalar 100 jukebox with 2 LTO-2 tape drives.
Recently we experienced lots of 'fsf', 'fsr' and I/O errors, I opened an
incient with Legato Tech. support and they sent me an e-mail from Linux Tape
Cert.. I did upgraded to this new kernel and problem now is:
The LSI Logic card (mptbase, mptscsih) drivers are not loaded during bootup and
when run 'inquire' the jukebox and tape drives are missing. When I manually
load the drivers, the jukebox will appear but with a different SCSI address.
This should be fine if the SCSI address stays the same after every reboot, but
it's not, every time I reboot and re-load the drivers, the jukebox is on
different scsi address.
Is there somebody who already experienced this or who knows how to fix this
problem/issue?
Environment:
Backups server: Red Hat ES3 / Networker v7.1.3
thanks in advance,
Librado Pamintuan
Technical Support Analyst II
Information Systems Dep.
Operations Group
City of Regina
Phone: (306) 777-7573
General Fax: (306) 777-6804
eFax: (306) 546-6002
eMail: lpamintuan AT regina DOT ca
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FR: jhancock
Hi Librado:
jbverify indeed fails. I am not sure if it is the Linux kernel that is giving
you problems or the robot driver of the jukebox. At any rate, check the
following further.
In your messages file, there is a connection to Discovery address 90.102.1.1
failed no route to host, also can't locate mdule scsi_hostadapter, why I am not
sure.
In additon, your kernel looks like it is 2.4.21-32.0.1. There are some kernels
in Linux that were not good, I will show you the article on this, you may to
upgrade the Linux kernel. Here it is.
What is the Red Hat kernel version that you have? The reason I ask is the
following just as a doublecheck:
Linux (RedHat) 3.0 Fact NetWorker for Linux 6.x Fact NetWorker for Linux 7.x
Fact RedHat kernel version 2.4.21-27.0.2 Fact Hardware is supported as per the
NetWorker Hardware Compatibility Guide for the version of RedHat Linux. Symptom
SCSI errors when device connected to RedHat Linux 3.0 servers Symptom Tapes do
not load/unload out of jukebox Symptom SCSI bus driver errors Symptom
Input/Output errors when trying to backup to a RedHat Linux 3.0 system. Fix
There are known issues with the RedHat kernels causing problems with loading
and unloading tapes, input/output (I/O) errors, etc.
RedHat kernel version 2.4.19 ~ 2.4.23 all have various issues with them.
Please contact RedHat for a newer kernel.
For more information, users can refer to the following website:
<http://www.linuxtapecert.org/>
On Linux nsjb execution makes use of the passthrough mechanism provided by the
"sg" driver. The media changer device will be accessed via the /dev/sg?
representation typically as /dev/sg[0-32] If there are any jukebox operational
issues follow these guidelines:
1. Run rpm -lcp package_name to verify that the packages have been installed
2. Run lsmod to get listing of loaded modules
3. Check the listing in /proc/scsi/scsi and /proc/scsi/sg/device-strs file
4. Run dmesg for driver/hardware complaints
5. Check /var/log/messages for hardware errors
6. Check output from kudzu -p and parameter listing in /etc/modules.conf
7. Check package listing using rpm -qa command
8. "mtx" is a low level driver that can be used to control features of robot
outside of NetWorker. mtx driver package can be dowloaded from:
mtx driver dowload <http://mtx.sourceforget.net>
Once package installed can use it to move tapes into and out of drives as:
mtx -f /dev/robot_control_port load slot_number physical_drive_number
mt -f /dev/drive offline
mtx -f /dev/robot_control_port unload slot_number physcial_drive_number
If jukebox operations using "mtx" fail the problem cannot be because of
NetWorker
9. For NetWorker specific debugging :
Make sure that inquire works
Run jbverify to test the library
Set nsrjb debug level using JBDEBUG and capture additional information
Trace execution of failing nsrjb using strace
Thanks.
Jeanette Hancock, CSE, EMC/Legato Tech Support
EMC Software Group
support AT legato DOT com
1-877-534-2867
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