I have a FAS3020 system.
There is a aggregate with 23 disks(it is also only one RAID DP).
I backup it to a LTO4 tape library which is connected to a DELL PE2950 server.
Before the backup speed is only 90GB/hour via TCP/IP protocol.
After i change it to NDMP protocol the backup speed is up to 200GB/hour.
But my question is how can i make it faster again?
Or can i improve it?
What is the best speed of this device?maybe 500GB/hour ??
I checked that:
1.the network usage is 60% of the 1Gb network adapter.
2.both the CPU usage of the PE2950 and FAS3020 are not high.
The native speed of the LTO4 device is 120MB/s, it can be much more with compression (I think you have this case with 200MB/s). The max speed is 864GB/hour.
which method do you use for backup?
I use Symantec Backup Exec 2010 R2.
As i know,until now the best speed of LTO4 is 250GB per hour.
I checked all my LTO4 tape unit.So,i think the bottleneck is the LTO4 tape.
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