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Full Discussion: Need little help in understanding UNIX file system.
Top Forums UNIX for Beginners Questions & Answers Need little help in understanding UNIX file system. Post 302970582 by jim mcnamara on Friday 8th of April 2016 09:50:49 AM
Old 04-08-2016
The file/directory structure results from mapping directory contents onto the disk. It is metadata. The hierarchy does not exist at the physical disk level. One physical file can be located in data blocks in unrelated places on a single disk. Same thing for a directory.
inodes are the 'entry' point - kind of like an 'address book' for the physical file.
 

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LEARN ABOUT MOJAVE

pvchange

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

NAME

       pvchange - change attributes of a physical volume

SYNOPSIS

       pvchange  [--addtag  Tag]  [-A|--autobackup y|n] [-d|--debug] [-f|--force] [--deltag Tag] [--metadataignore y|n] [-h|-?|--help] [-t|--test]
       [-v|--verbose] [-a|--all] [-x|--allocatable y|n] [-u|--uuid] [PhysicalVolumePath...]

DESCRIPTION

       pvchange allows you to change the allocation permissions of one or more physical volumes.

OPTIONS

       See lvm for common options.

       -a, --all
              If PhysicalVolumePath is not specified on the command line all physical volumes are searched for and used.

       --metadataignore  y|n
              Ignore or un-ignore metadata areas on this physical volume.  If metadata areas on a physical volume are ignored, LVM  will  not  not
              store metadata in the metadata areas present on this Physical Volume.

       -u, --uuid
              Generate new random UUID for specified physical volumes.

       -x, --allocatable y|n
              Enable or disable allocation of physical extents on this physical volume.

Example
       "pvchange -x n /dev/sdk1" disallows the allocation of physical extents on this physical volume (possibly because of disk errors, or because
       it will be removed after freeing it.

SEE ALSO

       lvm(8), pvcreate(8)

Sistina Software UK                                      LVM TOOLS 2.02.95(2) (2012-03-06)                                             PVCHANGE(8)
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