March 14, 201214 yr Hey all, I have a windows 7 VM running on top of unraid. And for a while, I was simply dealing with the slowness...now its too much. I am only getting about 2MB per second when copying from the virtual machine to the array. My Nic in vbox is it birdged mode. Anyone have any suggestion??
March 15, 201214 yr Author So i did a file copy strictly inside the VM.... From the root of my C drive to the Desktop and it was still slow...about 2MB/s So is this because of the Virtual Disk being on Unraid? Will it improve if I move the VM to its own disk???
March 18, 201214 yr So is this because of the Virtual Disk being on Unraid? Will it improve if I move the VM to its own disk??? You have hit the nail squarly on the head my friend. Get you VM's off the array and onto another drive such as a cache or SNAP drive and it will be 100x faster.
March 18, 201214 yr So i did a file copy strictly inside the VM.... From the root of my C drive to the Desktop and it was still slow...about 2MB/s So is this because of the Virtual Disk being on Unraid? Will it improve if I move the VM to its own disk??? yes. you're using a protected drive for the OS. Things like the pagefile and OS temp stuff along with file manipulation is all being written to the array drive and updating parity at the same time. you will probably also notice that the whole unraid server is also running slower due to this. If you start coping files from your desktop while using the VM heavily, you should see everything slow down and be brought to its knees. as mentioned. get VM out of the array. the other option is to flip it around. make unraid a VM with something like ESXi
March 26, 201214 yr Author Thanks for the input guys. Right now I have a 3 drive array with no cache drive. I have no problem updating my license, but if I put the VM on the cache drive, and it fails, I would lose the VM data. What are my options? Should I (or can I) mount a raid 1 using my Supermicro sas and store the VM on an NTFS volume so I have some fault tolerance? Any ideas are welcomed
March 29, 201214 yr Author I upgraded my license and moved the VM to the cache drive successfully and wow...what a difference. Still trying to come up with a way to guard against a failure.
March 29, 201214 yr 3 options for saving apps on a cache drive 1 is to shutdown the VM once in a while and copy the vmdk to the array. 2 use crashplan to backup changes in it daily. 3 use a hardware mirror for a cache drive. John
March 29, 201214 yr Author Will that Supermicro SAS controller do the job or do I need that 400+ dollar raid controller? (Cant recall the name)...
March 30, 201214 yr Maybe this one would work. Need input from the pros on that one http://www.newegg.com/Product/Product.aspx?Item=N82E16816132008 John
March 31, 201214 yr It is not a hardware raid card. it has windozs drivers to do a crappy software raid. It wont do that in unRAID.
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