On Monday, May 09, 2011 01:57:54 PM Ali Ahsan wrote: > On 05/09/2011 10:51 PM, Lamar Owen wrote: > > On Monday, May 09, 2011 01:11:17 PM Ali Ahsan wrote: > >> sd 0:0:0:0: Attached scsi disk sda > >> Vendor: ATA Model: WDC WD10EARS-003 Rev: 80.0 > >> Type: Direct-Access ANSI SCSI revision: 05 > > Are your two drives in a RAID? cat /proc/mdstat > > > No i am doing LVM with 2X 1 TB HD Can you give the output of pvdisplay, vgdisplay, and lvdisplay? Also, did you align the pv's to 4K sectors when you partitioned? What does iostat -x tell you? The particular drives (hardware) you are using have known performance issues; there are a number of reports in Western Digital's forums confirming this, for more than just Linux.