reboot every week seems to fix it, probably problem with cache though

absolutely legit

This is serious question
Is starwind working on a WHS2011 box?
And is it recommended to run it on software RAID1 within Windows?

Or might i better use CIFS to backup data from ESX vm to other (lowend) machine.

In the mean time i switched NICs (now onboard iSCSI <-> PCI-X or PCIe i forgot, normal LAN), still the same. At the moment i cannot bypass the PERC controller, because Windows is installed on the same disks (Windows no software RAID1 for OS). Another 2 disks i also cannot install because there is no...

i could if i would be physically there ...

i guess i will swap cables between NICs next time and make the other nic for iSCSI, i got some feeling the nic is defective

what is strange, the speed varies a lot. One time it took 800mins for an 140gb snapshot and next time it took only 60mins. And when its sort of slow i can see NIC copy speed is going up/down all the time from 10-20MB/s Does this still sound like an IRQ issue? With tests i am a bit limited because on...

I found out that disk cache was disabled, but this controller has also no BBU. After enabling the cache, i didnt had anymore slowdowns at writing. It could be still faster, 20mb/s over iSCSI but better than 3mb/s before. What is strange, that atto had no slowdowns. But as copied a big file locally i...

Did not try other disk because i have none. These are 2 brand new SATA Disks on SAS Dell PERC 5/iR Controller. When i run atto alone with 2gb size, everything is ok. But as soon there is also traffic on network which involves disk writes, it gets so slow. That probably also explains why NFS Server o...

I further tracked down that both on CIFS and iSCSI the download was getting worse but upload was fine. So checked in performance monitor and saw that the disk queue length was still at 100% when it was copying only 300kb/s.

So it seems i have found the problem at controller or disks

Another strange thing i just found, if i copy a very big file from the VM to Windows over CIFS, it starts fast but after a couple of seconds it drops down to 300kb/s. But this are completely different NICs on a switch. I only have windows clients and ESX, so i ran iperf between windows vm and window...

Hello Anton

the only thing i found is NIC statistics

Also i found that this NIC shares same IRQ (16) as SAS controller

Thomas

Hi I installed starwind at home, everything on VMware Workstation sitting on Windows7. So i run inside this, virtualized ESX5i and another VM with Win2003 and free version of StarWind. Everything was fine, i was getting copy speeds around 30-50mb/s which is more than ok because everything is on one ...