Another thought I just got this info from one of the other postings good stuff 
not my idea but might work.



"If your environment is SSO I will give you 2 tips. 
Wait for the completion of all backups and then run make_scsi_dev. Then 
configure all Linux drives. 
After that comment (#) the make_scsi_dev line at the NetBackup startup script. 
And do not reboot the system. If you do it you must run the make_scsi_dev 
before netbackup start (and all drives must be idle) 
I have install several linux systems and all working fine. 
Smpt"

-----Original Message-----
From: Matthew Johnson 
Sent: Thursday, February 08, 2007 8:01 AM
To: 'Whelan, Patrick'; 'veritas-bu at mailman.eng.auburn.edu'
Subject: RE: [Veritas-bu] Linux media server recommendations

Pat,

I have 4 Linux media servers two san and two regular running SUSE9 with a 
Solaris master. The san media servers seem to be doing fine as for the others 
so so! I have one that crashes every time the make_scsi_dev command runs.

When NB is started by the../bin/goodies/netbackup script, it runs a
make_scsi_dev on boot that creates entries in /dev/st & /dev/sg.  These
/dev/st entries are sym-links back to the /dev/nstXX device names. The problem 
is it scans all scsi  devices and if any are busy we get I/O errors, and if the 
scsi device is in any way associated with the kernel ----down goes the 
system--.  

Also the trouble is that when NB is (re)started, if the tape drive is assigned 
by
another media server, then the scan of the tape drives on the Linux media
server returns an I/O error for that assigned drive that the make_scsi_dev
binary interprets as a bad drive & the /dev/st link is not built.  tpconfig
doesn't match & the tape daemons don't start right - not to mention that my
drive count is also wrong.

This has been a consistent problem that neither IBM nor Veritas can figure out. 
We get the generic response "upgrade to the latest kernel" which is not always 
going to work (Veritas storage foundation) that is another discussion.

I am still working on a solution, I think what I am going to do is create a 
script to remove the /dev/st and /dev/sg devices before Netbackup starts. And 
limit recycling Netbackup on the linux servers to a min.

I know this was long winded and I apologize.

Thanks 

-----Original Message-----
From: veritas-bu-bounces at mailman.eng.auburn.edu [mailto:veritas-bu-bounces 
at mailman.eng.auburn.edu] On Behalf Of Whelan, Patrick
Sent: Wednesday, February 07, 2007 6:25 AM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] Linux media server recommendations

Does anyone have any suggestions for Linux media servers?

Regards,

Patrick Whelan
NetBackup Specialist
Architect & Engineering
+44 20 7863 5243

Of all the things I've lost, I miss my mind the most! - Unknown

There are only 10 kinds of people on earth - those who understand binary
and those who don't.

.... Als sie mich holten,
gab es keinen mehr, der protestieren konnte 
-- Martin Niem?ller



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