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Operating Systems Linux Red Hat Device Mapper Notations and LVM Post 302376714 by kanna_geekworkz on Wednesday 2nd of December 2009 05:42:11 AM
Old 12-02-2009
Device Mapper Notations and LVM

Hi,

I had a doubt regarding device mapper notations and their corresponding LVM volumes.

I have configured a volume group with two logical volumes in it as root and swap.

The entries in the /etc/fstab file show the dm notations namely,

/dev/mapper/VolGroup00-LogVol01
/dev/mapper/VolGroup00-LogVol02

instead of,

/dev/VolGroup00/LogVol01
/dev/VolGroup00/LogVol02

Also swapon -s command gives the dm notation, i.e /dev/mapper/VolGroup00-LogVol02 instead of the actual LVM path.

Is this normal behaviour or have I done something wrong?

Also, is there a way to find a mapping between the device mapper
notations and the corresponding lvm volumes?

Thanks,
KK
 

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

NAME
cache_repair - repair cache binary metadata from device/file to device/file SYNOPSIS
cache_repair [options] -i {device|file} -o {device|file} DESCRIPTION
cache_repair reads binary cache metadata created by the respective device-mapper target from one device or file , repairs it and writes it to another device or file. If written to a metadata device , the metadata can be processed by the device-mapper target. -i, --input {device|file} Input file or device with binary metadata. -o, --output {device|file} Output file or device for repaired binary metadata. -h, --help Print help and exit. -V, --version Output version information and exit. EXAMPLE
Reads the binary cache metadata from file metadata , repairs it and writes it to logical volume /dev/vg/metadata for further processing by the respective device-mapper target: cache_repair -i metadata -o /dev/vg/metadata DIAGNOSTICS
cache_repair returns an exit code of 0 for success or 1 for error. SEE ALSO
cache_dump(8) cache_check(8) cache_restore(8) AUTHOR
Joe Thornber <ejt@redhat.com> Heinz Mauelshagen <HeinzM@RedHat.com> Red Hat, Inc. Thin Provisioning Tools CACHE_REPAIR(8)
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