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 HPUX
pvremove
pvremove(1M) pvremove(1M)
NAME
pvremove - remove LVM data structure from a physical volume
SYNOPSIS
DESCRIPTION
The command clears the LVM data structure on a disk, so that it is no longer an LVM physical volume. The device may then be used by the
file system or by other volume managers.
The operation is denied if pv_path is assigned to a volume group. The command only clears the LVM data structure on a disk if the disk
does not belong to a volume group. This avoids accidentally removing a valid physical volume under a volume group. If the physical volume
to be removed belongs to a volume group, use the command to first remove the volume group associated with the physical volume.
Arguments
recognizes the following arguments:
pv_path The character (raw) device path name of a physical volume.
EXTERNAL INFLUENCES
Environment Variables
determines the language in which messages are displayed.
If is not specified or is null, it defaults to "C" (see lang(5)).
If any internationalization variable contains an invalid setting, all internationalization variables default to "C" (see environ(5)).
EXAMPLES
Remove LVM data structure on the physical volume
SEE ALSO
lvremove(1M), vgremove(1M), intro(7), lvm(7).
pvremove(1M)