Hello,
I am currently tesing MS iSCSI Target 3.3 on server 2008 r2 with MS iSCSI Initiators on Server 2008 r2.
On the Storage Server i have 2 RAIDs (buildin SATA, and external for SAS) and i tested their performance with Iometer (with the same settings all the time).
Results with Iometer runned from the storage server:
Disk1 on RAID1 (4xSATA Disks in RAID10) ~ 300 IOps
Disk2 on RAID2 (2xSAS Disks in RAID1) ~ 550 IOps
Results with Iometer runned from other server on the same disks via iSCSI network
Disk1 ~ 75 IOps <- this is very strange, and i cannot figure why?
Disk2 ~ 490 IOps <- this look like to be normal
In such case i think that the problem is not in the iSCSI Network , because the disk2 that are on SAS RAID don`t have such perf. degradetion.
My questin is why disk1 that is on SATA RAID have such performance degradation over iSCSI network?