Can a Loopback Filesystem be Partitioned? Post: 95472

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Special Forums Hardware Filesystems, Disks and Memory Can a Loopback Filesystem be Partitioned? Post 95472 by deckard on Wednesday 11th of January 2006 01:09:29 PM

01-11-2006

Registered User

Can a Loopback Filesystem be Partitioned?

I have a disk image file created for use with the Linux version of the QEMU emulator. It's partitioned. I opened it with fdisk and the partitions show up with some extra messages about physical/logical endings:

Code:

Disk knoppix.img: 0 MB, 0 bytes
16 heads, 63 sectors/track, 0 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

      Device Boot      Start         End      Blocks   Id  System
knoppix.img1   *           1        8074     4069264+  83  Linux
Partition 1 has different physical/logical endings:
     phys=(1023, 15, 63) logical=(8073, 15, 63)
knoppix.img2            8075        8322      124992   82  Linux swap / Solaris
Partition 2 has different physical/logical beginnings (non-Linux?):
     phys=(1023, 15, 63) logical=(8074, 0, 1)
Partition 2 has different physical/logical endings:
     phys=(1023, 15, 63) logical=(8321, 15, 63)

I noticed that the filename of the image file becomes "knoppix.img1" for the first partition and "knoppix.img2" for the second partition. So... is there a way to mount this outside of QEMU? I tried appending the 1 and 2 to the filename but I just get a "no such directory or file" message. Any ideas? Or am I just sunk?

deckard

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vgreduce

VGREDUCE(8)						      System Manager's Manual						       VGREDUCE(8)

NAME

       vgreduce - reduce a volume group

SYNOPSIS

       vgreduce  [-a|--all] [-A|--autobackup y|n] [-d|--debug] [-h|-?|--help] [--removemissing] [-t|--test] [-v|--verbose] VolumeGroupName [Physi-
       calVolumePath...]

DESCRIPTION

       vgreduce allows you to remove one or more unused physical volumes from a volume group.

OPTIONS

       See lvm for common options.

       -a, --all
	      Removes all empty physical volumes if none are given on command line.

       --removemissing
	      Removes all missing physical volumes from the volume group, if there are no logical volumes allocated on those. This resumes  normal
	      operation of the volume group (new logical volumes may again be created, changed and so on).

	      If this is not possible (there are logical volumes referencing the missing physical volumes) and you cannot or do not want to remove
	      them manually, you can run this option with --force to have vgreduce remove any partial LVs.

	      Any logical volumes and dependent snapshots that were partly on the missing disks get removed completely. This includes those  parts
	      that lie on disks that are still present.

	      If your logical volumes spanned several disks including the ones that are lost, you might want to try to salvage data first by acti-
	      vating your logical volumes with --partial as described in lvm (8).

SEE ALSO

       lvm(8), vgextend(8)

Sistina Software UK					 LVM TOOLS 2.02.67(2) (2010-06-04)					       VGREDUCE(8)