Hi All, I'm hoping someone can possible point me in a direction to help with poor disk performance. I have XEN 4.4.0 running on Ubuntu server 14.04.1 with Windows 7 64bit with SP1 within a DomU. Dom0 has 3 pinned VCPU's and ballooning has been disabled with 2GB of memory locked to it. I have installed the GPL PV signed drivers version 0.11.0.372 within Windows. I have virtualization (VT-x) enabled and IOMMU (VT-d) enabled and xen see's it enabled. I'm having a hard time running a simple MS SQL 2012 database within Windows. I'm getting all sorts of I/O timeout errors. The computer has a ASUS P9X79 Pro mother board with the Intel i7-4930K CPU. The Dom0 is running on it's own hard drive. I'm running two Western Digital 3TB Black SATA drives plugged into 6GB/s ports. These drives have Software RAID 1 running mirrored and the DomU is running within LVM partition on the raid array. I've tried putting the SQL files on a dedicated drive with no raid or lvm and still the same results. Any ideas to improve throughput or so I don't get SQL error # 833 (i/o timeouts) within windows? Thanks so much. Jason Here's my config for the DomU ---------------------------------------------- builder='hvm' memory = 24672 vcpus = 9 # Should be at least 2KB per MB of domain memory, plus a few MB per vcpu. shadow_memory = 10 name = "iaisync01new" vif = [ 'bridge=xenbr0, model=e1000, mac=00:16:3E:4F:1A:35' ] acpi = 1 apic = 1 disk = [ 'phy:/dev/vg0/iaisync01_new,xvda,w', 'phy:/dev/vg0/iaisync01_datanew,xvdb,w', 'phy:/dev/sdd1,xvdc,w' ] #----------------------------------------------------------------------------- # boot on floppy (a), hard disk (c) or CD-ROM (d) # default: hard disk, cd-rom, floppy boot="c" sdl=0 vnc=1 vncconsole=1 vncpasswd='insight' #serial='pty' usbdevice='tablet' localtime=1 _______________________________________________ Xen-users mailing list Xen-users@lists.xen.org http://lists.xen.org/xen-users