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...1 then create an LVM partition fdisk /dev/sdb then create an LVM partition I can then create a volume group with those two disks: pvs vgcreate mirrorvg /dev/sdb1 /dev/gnbd0 The problem occurs when I try to create a mirrored LV using the above VG. [root at vm-helios-002 ~]# lvcreate --mirrorlog core -L 256M -n mirroredlv01 -m 1 mirrortestvg Insufficient suitable allocatable extents for logical volume : 64 more required Unable to allocate extents for mirror(s). It doesn't matter what disk sizes are available. Even creating a non-mirrored LV causes issues: [root at vm-helios-002...

...ug/boot/xen-syms-2.6.18-53.1.14.el5.debug --vmlinux=/usr/lib/debug/lib/modules/2.6.18-53.1.14.el5xen/vmlinux --separate=all Then we ran bonnie on each device in sequence, stopping oprofile and saving the output each time. # bonnie++ -d /mnt/test/mirror # opcontrol --stop # opcontrol --save=mirrorlog # opcontrol --reset The LV with the corelog displayed negligible iowait, as expected. However, the other experienced quite a bit: # opreport -t 1 --symbols session:iowait_mirror warning: /ahci could not be found. CPU: Core 2, speed 2400.08 MHz (estimated) Counted BUS_IO_WAIT events (IO requests...

I'm pulling my hair out trying to setup a mirrored logical volume. lvconvert tells me I don't have enough free space, even though I have hundreds of gigabytes free on both physical volumes. Command: lvconvert -m1 /dev/vg1/iscsi_deeds_data Insufficient suitable allocatable extents for logical volume : 10240 more required Any ideas? Thanks!, Gordon Here's the output from the