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Operating Systems AIX Confused with File System Concepts Post 44752 by quickfirststep on Wednesday 10th of December 2003 11:32:06 AM
Old 12-10-2003
Data Confused with File System Concepts

Hello,

I've been reading the AIX 5.1 System Concepts PDF but I'm still confused about some file-system concepts and their relationships.

What is the 'allocation group size'?
How are 'disk allocation unit'/'fragment size', NBPI and 'allocation group size'?
And how are the above three concepts realted logical parition size?

Thanks
Smilie
 

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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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