Alex,
Check the 4500 client parallelism. Assuming this is your only client and
you have a dedicated 2Gb network between the client and the server, you
should set your client parallelism to about 12 (assuming you have at
least 10 savesets on the 4500). You should also reduce the tape target
sessions limit to 2. The server parallelism should allow for at lease 12
savesets.
As regarding to your 2 Ethernet trucks, you should double check your
trunking configuration so tat load balancing will be done on the two
wires and not mac address balancing.
HTH,
        Itzik

> -----Original Message-----
> From: Alex Theodore [mailto:alex AT FUZZYCHEESE DOT COM]
> Sent: Sunday, January 11, 2004 18:19
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: [Networker] Performace isssues with LTO 2 Ultrium and unable
to write to all tapes at same
> time
> 
> I am only getting about 3-6 megabytes/s when backing up to LTO 2 tape
drives.  I would expect that
> I should get somewhere near the advertised value, but I am not.  Here
are the details.
> 
> - Legato Network 6.7.1
> - Solaris 8 (latest patches)
> - Sun L700 with 6 HP LTO 2 tape drives
> - Backup Server is a Sun Fire V880
> - Backup Client is Sun Enterprise 4500
> - Network pipe for backups is a dedicated, directly connected (no
switch), dual gigabit ethernet,
> which is trunked (glued together into 1 virtual pipe)
> 
> 
> The data on the client which is being backed up are images (photos)
which are a few megabytes in
> size.  I decided to split up the save sets into 6 different client
configurations with the
> parallelism set to 6 so that all 6 tape drives would be used at the
same time during backups but
> this isn't happening either.. I can only seem to write to a few tape
drives at once..
> 
> Any ideas would be greatly appreciated.
> 
> TIA,
> 
>   Alex
> 
> --
> Alex Theodore
> alex AT fuzzycheese DOT com
> Boca Raton, FL  USA
> 
> --
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