LTO2, Copper GB and Server to Server Backup

[unixb0y]

Got a new LTO2 tape drive yesterday.

I'm doing server to server backups using arcserve 2000(or version 7)

So far, i'm getting 700MB/min between the servers.

LTO2 is rated for 30MB/s. So 700MB/min is only about 11MB/s. Which isn't all that great.

Each server has a copper Gigabit adapter.

I'm planning increasing the IrpStack size soon.

What kinda of speeds are you getting with your LTO2?

 

[mohamdr]

Hi

If Tape Engine update patch is applied if not apply it from the link

http://support.ca.com/Download/patches/asitnt/QO39924.html

regards
mohamdr

 

[ssoulages]

There are many factors that come into play when considering backup speeds. The following are in no particular order:
- file size (many smaller files back up slower than a few large ones)
- Disk speeds (10K)
- SCSI drivers/firmware
- Disk fragmentation
- Switch/hub configuration/firmware (we just replaced a GB copper switch that was dropping packets without explaination. It was causing agent time out issues as well as poor speeds)
- Processor/Ram of both client and server
- NIC drivers/firmware

We have an Exabyte M2 and see speeds of up to 1515MB/min for 25 GB of data (mostly large files). However, the majority of the other servers are in the 700MB/min range.