Forgive me if this has been asked before, I'm a bit behind on reading 
the list.

How do you keep your LTO3 drives spinning fast enough?

I have a meeting with an idiot manager who refuses to believe that we
can't stream fast enough to use LTO3 without damaging the tape and/or
drive.  I have limited DSSU space.  I have been in environments in the 
past where shoeshining was normal and so was the 20% failure rate and I 
don't want to go back.  It is my understanding that most people aren't 
spinning LTO3 fast enough and are living with higher failure rates.

The only thing I can think of is to send everything to DSSU first (TSM 
anyone?), but NBU sucks at telling you the throughput there so I'm not 
sure I trust that anyway.  Any tricks for getting throughput numbers out 
of NetBackup (5.1) DSSU duplicates are very welcome.

My backup master with a 6-drive internal RAID-10 can barely hit 27MB/s 
reliably doing OS backups, but my DSSU is on SATA SAN drives and hard 
to measure.

Thanks!

-- 
Joe Royer / SysAdmin / Digital Motorworks / 512-692-1028


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