From: William L. Maltby <BillsCentOS at triad.rr.com> > From: Itay <itayf at nospammail.net> > > Also, I just started working with lvm. The following warnings > > are genertated whenever I run one of lvm commands on the external > > usb disk (MyBook by Western Digital). [snip] > > [root at frodo pilpel10]# vgcreate VGe1 /dev/sdc2 > Did you do pvcreate? As far as I remember -- yes. When I return to my office, at the beginning of next week, I'll look at the terminal session to see the exact command sequence. But my conviction is reinforced by the output of pvscan and pvdisplay (wasn't in the original message) below. > > /dev/dm-11: read failed after 0 of 4096 at 5242814464: Input/output error > > /dev/dm-11: read failed after 0 of 4096 at 0: Input/output error > > /dev/dm-12: read failed after 0 of 4096 at 54460416: Input/output error > > /dev/dm-12: read failed after 0 of 4096 at 0: Input/output error [snip] > > Volume group "VGe1" successfully created > > [root at frodo pilpel10]# pvscan > > /dev/dm-11: read failed after 0 of 4096 at 5242814464: Input/output error > > /dev/dm-11: read failed after 0 of 4096 at 0: Input/output error [snip] > > PV /dev/sdc2 VG VGe1 lvm2 [296.13 GB / 296.13 GB free] > > PV /dev/sda2 VG VG00 lvm2 [232.78 GB / 1.78 GB free] > > Total: 2 [528.91 GB] / in use: 2 [528.91 GB] / in no VG: 0 [0 ] > [root at frodo ~]# pvdisplay /dev/sdc2 /dev/dm-11: read failed after 0 of 4096 at 0: Input/output error /dev/dm-12: read failed after 0 of 4096 at 0: Input/output error /dev/dm-13: read failed after 0 of 4096 at 0: Input/output error /dev/dm-14: read failed after 0 of 4096 at 0: Input/output error --- Physical volume --- PV Name /dev/sdc2 VG Name VGe1 PV Size 296.13 GB / not usable 0 Allocatable yes PE Size (KByte) 4096 Total PE 75810 Free PE 24098 Allocated PE 51712 PV UUID Ue56s5-nkax-csIU-6iBX-l4eb-hIJ1-nxJLgl Thanks, Itay