TBU options for PowerEdge 2550

Seth Mos knuffie at xs4all.nl
Thu Nov 8 00:48:17 CST 2001

At 22:21 7-11-2001 -0600, John_E_Fitzgerald at dell.com wrote:
>The offically supported list of TBUs for the PowerEdge 2550 does not include
>any of the PowerVault 110T Single tape DLT4000/7000/DLT1 external units. I
>see no reason why they won't work; a remote site wants to use this type
>single external tape unit, native TAR backups only (which apparently rules
>out LTO due to speed unless you are running SW like ARCServe) so they can
>swap the unit between servers as required. I have also been told that
>autoloader setups are not natively supported in RH 7.1 (like the PowerVault
>120T 7 tape autoloader). Is anyone using a setup like this or have

I use the PV 110 LTO here and it backups about 30GB in 45 minutes. Average 
backup speed is about 10-12MB/s with hardware compression turned on and no 
software compression.

Even when using gzip --fast the backuptime increments about 100%. The speed 
of gzip is mainly limited by the speed of a single processor. The 1.13 Ghz 
processors in this machine can not compress fast enough to saturate the 

Every program has two purposes one for which
it was written and another for which it wasn't
I use the last kind.

More information about the Linux-PowerEdge mailing list