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Full Discussion: how to mirror raid5
Operating Systems AIX how to mirror raid5 Post 302163759 by bakunin on Saturday 2nd of February 2008 08:51:58 AM
Old 02-02-2008
Quote:
Originally Posted by itik
Is this going to have data integrity problem considering SAN is much faster than SSA? And my system is only 4.3.3 with JFS only.
Use the "mirror write consistency" option if you want to be 101% sure, but: no, there are no problems with data integrity because of unequal disk speeds.

Quote:
When detaching the SSA disk, the command is reducevg hdisk14. Is that correct?
yes, that is correct. After that use "rmdev -dl <disk>" to remove the disk device prior to physically detaching it.

Quote:
And there's no conflict for all types of disks whether raid 0,1,5 to be mirrored.
No, there is not. When the disk is used by the LVM it is turned into a "physical volume" and this is raw storage space, regardless of where it comes from. This is the main difference between a "disk" and a "physical volume": it doesn't matter any more of which the physical volume is constructed.

Hope this helps.

bakunin
 

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LEARN ABOUT OPENSOLARIS

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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