2012/10/20 Kanwar Ranbir Sandhu <m3freak at thesandhufamily.ca> > Hello Everyone, > > I have a CentOS 6.3 host running a few KVMs. One of them is a CentOS > 6.3 KVM that I want to use for making backups with BackupPC. What I'm > having a problem with is assigning the KVM an external drive. > > I used to run BackupPC on an Ubuntu box. The backups went to an external > eSATA 1.5TB, ext4 format, single partition drive (regular 3.5" in an > enclosure). I want to now attach that same external drive to my KVM > host, and pass it up to the KVM running BackupPC. > > I added the entire drive as a second storage disk to the KVM. I used the > disk's label (/dev/disk/by-label/backups) so that I wouldn't have to > worry about the device name changing down the road. When I booted up > the KVM and listed the disks, I only saw "/dev/vdb". I was also > expecting to see "/dev/vdb1". > > I ran fdisk on it only to see the partition table wasn't detected. The > drive itself is OK - I can mount it successfully on the KVM host. > Here's the fdisk output: > > Device contains neither a valid DOS partition table, nor Sun, SGI or OSF > disklabel > Building a new DOS disklabel with disk identifier 0xd6912a1b. > Changes will remain in memory only, until you decide to write them. > After that, of course, the previous content won't be recoverable. > > Warning: invalid flag 0x0000 of partition table 4 will be corrected by > w(rite) > > WARNING: DOS-compatible mode is deprecated. It's strongly recommended to > switch off the mode (command 'c') and change display units to > sectors (command 'u'). > > Command (m for help): p > > Disk /dev/vdb: 1500.3 GB, 1500300861440 bytes > 16 heads, 63 sectors/track, 2907018 cylinders > Units = cylinders of 1008 * 512 = 516096 bytes > Sector size (logical/physical): 512 bytes / 512 bytes > I/O size (minimum/optimal): 512 bytes / 512 bytes > Disk identifier: 0xd6912a1b > > Device Boot Start End Blocks Id System > > Command (m for help): quit > > > So...how do I properly assign this eSATA disk to the KVM? FYI: the > enclosure can use USB as well. > > Thanks, > > Ranbir > > > Hi Ranbir, please post the relevant configuration items from the guest's xml definition and the output of fdisk when done on the host.