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09394 - Tape Drives

09394 - Tape Drives

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Tape Drives

Hi Doreen,

We use 3590's (E11's currently, looking to upgrade to H11's)

From a personal view I don't like the LTO. Although they do write data
incredibly quickly, the data verification on them isnt a match to a 3590.
Also, the 3590 will recover a lot more data errors before issuing a media
error, where as the LTO will error very quickly... also, looking around, the
Hardware doesn't seem too fantastic from a reliability perspective.

Currently, we use one 3590 to backup 700Gb machine (Save 21 every night),
which takes about 4.5hrs... we are starting to investigate the use of BRMS &
paralleling tape units.

You can go down to object level "spreading" and Im told that the reduction
in backup time to tape units ratio is very linear, ie 2 units will half your
backup time, 4 will quarter it. Only problem I see with this is that the
restore would be very messy if you didn't have the same number of tape units
on your restore box, as you would need to perform a tape change for every
object (somewhere in the region of 15000 on our box)

Sorry to ramble on, just my thoughts

Best regards

Andi



-----Original Message-----
From: Anderson, Doreen [mailto:dandersoZballhort.com]
Sent: 18 February 2003 20:47
To: DoNotReply@consolut.eu
Subject: Tape Drives

Does anyone have experience/comments with the 358x LTO Gen 2 tape
drives? They are supposed to achieve 105MBps at a 3:1 data compaction.

If you do, what model are you running?

Are you also backing up all the Intel/network servers on the floor?



We've used 3590 E11 for a few years and have been very happy - but we're
looking for even fast save times especially since PRD DB is at 420GB

We don't have a large investment of vaulted / archived 3590 media (other
than full system saves) so we are in a position to change the media





Thanks!

Doreen





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