Simon,

For what it’s worth

64kb buffer size

128 buffers

Multiplex 6

LTO4

10GB backbone/2Gb FC

I have played around with all sorts of buffer sizes but in our mixed environment 64 works best.

But 4 days for 1.7TB seems more like the norm to me. We have several servers verging on 1TB that can take 36 hours.

David Spearman

County of Henrico

Hi All
Anyone got any real world experience on buffer settings:

scenarion:
Win2k3 San Media, connected to 2GB Fabric attached 8 LTO4 Drives.
Due to drive availability, Multiplexing onto one drive.

Main problem: One volume (1,7tb in size) takes over 4 days to fully complete.
Got the Tuning Guide and Technote 244602, but I tried some settings, only to find the backup would not even mount tape correctly.

So back to "no" settings at the mo.

Volume are generic files/folders, mixture of large and small sizes. But 1.7TB's in my view should be done quicker. Also Data is compressed.

Regards

Simon

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