I have a fileserver with an 8TB volume for which MS DPM is doing a consistency check, its now running 16 hours and it is probably less than 30% through the volume. Why is that so slow? My MS SQL database backups (few hundred GBs) are done in a flash.
My DPM Server has 32GB memory and 2* Quadcore 2.4Ghz with a DAS attached that has 24 disks. My file server has 4GB memory and 2* Quadcore 2.4Ghz with 11 local disks each 1TB configures as RAID 5.
Both servers are running Windows 2008 R2 64Bit. Each server is connected via 1 GB LAN connection
System performance parameters show:
- DPM Server - CPU Load: < 0.1 - DPM Server - Disk read queue length: average < 1 - File Server - CPU load; < 0.1 - File server - Disk read queue length: average 2 - File server - Read bytes per second; 12 hour average=24MB/s, Max=450MB/s - File server - Outgoing network traffic, average 10Mbps, max 60Mbps
All in all, the performance parameters look OK. I've ordered another 12GB memory for the file server, just in case but I am not sure whether that is addressing the root cause.