Hi,
We have the following set up:
1x DR4100 (2x 10GbE Domain Team) - provides virtual tape library to Microsoft DPM 2016 (virtual guest)
2x R730:
2x 300GB system disk in RAID-1
4x 10GbE QLogic BCM57810 (2x dual port adapters)
4x 1Gb Broadcom NetXtreme (onboard, unused)
QLogic Driver 7.13.54.0 25/03/2016, Firmware 7.12/7.14 (multiple versions listed in QLogic Control Suite)
Card 1 Port 1 - iSCSI VLAN
Card 1 Port 2 - Domain Team
Card 2 Port 1 - iSCSI VLAN
Card 2 Port 2 - Domain Team
Domain Team is used for, Guest Communication, Cluster Communication, Host Management.
MTU is set to 1500 for all adapters, flow control is off.
These 2 hosts share CSV's on a MD3620i and MD1200
Md3620i - 22x 300GB SAS 15K, 1x RAID-10, 2 LUNs, Dual controllers (4x 10GbE, 2x per controller)
MD1200 - 20x 1TB SATA 7200,2x RAID-10 evenly split, 1 LUN per RAID array, connected to MD3620i with 2x 6Gb SAS
Arrays are 64k segements, formatted to 64k ntfs
I'm finding performance is slow when doing internal copying from LUN to LUN, even within the same LUN, or from MD1200 to MD3620i.
If I copy from Host to MD I get 1.2GB/sec, but moving data around on the LUNs gets me about 80-150MB/sec - surely I should be getting more than this with RAID-10?
When running DPM, backup speeds tend to max out about 500Mb/sec during a host-level VM backup.
I Would expect speeds of around 1GB/sec when accessing the MD3620i CSVs and 300MB/sec from the MD1200 CSVs due to the 6Gb SAS limitation.
When migrating VM storage from one LUN to another, using the failover cluster manager, seems to take forever also.
Any ideas what could be causing my slow speeds? Am I expecting too much from the MD?
Thanks