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Top Forums UNIX for Dummies Questions & Answers What is /dev/mapper used for? Post 302846667 by rupeshkp728 on Sunday 25th of August 2013 11:35:55 AM
Old 08-25-2013
Thanks wisecracker for the reply.

In the link Linux lvm - Logical Volume Manager in section "Mount logical volumes" when the logical volume is mounted why does df -h output shows the volume mounted in dev/mapper?

In link Logical volume management also shows the same in section "Listing 8. Mounting the LV".
 

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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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