Simon,
thanks for your answer! I've checked all the client setting and they
seem to be ok,
no AV and nothing... Anyway: The strange point is, that if we're
storing a Master Server's
local volume to tape, it gives us about 40Mb/s to a single LTO3,
storing the DSU results
in 'bout 20Mb/s... whats wrong?
Besides this, I wonder if there are VERITAS customers that can really
utilize a full LTO3 (70Mb/s)
using network backups with multiplexing on a M$ Windows platform, any
experience?
I've read a tip 'bout using bpkar32 for testing purpose, I'll check
this!
Kind regards,
Mirko
On 15.09.2006, at 10:07, WEAVER, Simon wrote:
>
> Mirko
>
> Ok, well maybe we can compare things here, because I have been
> using DSU's
> to an HP EVA over fiber, and to be truthful, the throughput is
> pants !!! In
> fact, writing to LTO3 is BETTER than disk.
>
> I do think that writing to disks has been a poor experience for me,
> and its
> something I may not return to, because I cannot see where I am
> going wrong!!
>
> Things to look at on the client:
>
> 1) If AV is running, turn it off
> 2) If any Disk defrag / maintenance is taking place on the Server
> (Disk
> tune-ups, I/O other than backups), turn off
> 3) If Tracker.exe is running on the client, turn it off.
> 4) verify that the correct STU is being used for tape backups
> 5) What type of files are being backed up? Small files are still no
> good
> (even on fiber its poor).
>
> Over fiber for a server will SMALL files, a 60GB partition can take
> around
> 1:30 - 2 hours over LAN Network direct to fiber attached LTO3 Drives.
>
> 2TB of Data on a SAN Media Server takes between 4 - 10 hours
> (sometimes the
> last stream can take 10 hours, again its mainly a lot of small
> files on
> here).
>
> HTH - gives some ideas and suggestions. I do NOT use 6.0 as it's a
> little
> buggy (Talk to Ed, he can go into details on this!).
>
> Regards
>
> Simon Weaver
> 3rd Line Technical Support
> Windows Domain Administrator
>
> EADS Astrium Limited, B23AA IM (DCS)
> Anchorage Road, Portsmouth, PO3 5PU
>
> Email: Simon.Weaver at Astrium-eads.net
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