Replacing an Internal Disk Drive CRU

Change History for Replacing an Internal
Mirrored Disk Drive CRU
February 13, 2006
Changed the OSM Start Disk action to the OSM Start Volume action. The
Start Disk action is designed to fail if the mirrored disk is already in an Up
state because the mirror and primary disk volumes can have different data
and require a revive operation. To revive and bring up the disks properly,
use the OSM Start Volume action or SCF START DISK command.
September 1, 2005
Updated Notes for Replacing an Internal Mirrored Disk Drive CRU to
indicate that FCHECK should be used with H-series RVUs and G06.24 and
later G-series RVUs. TANDUMP CMFILE should be used only with G06.23
and earlier RVUs.
November 30, 2004
Added caution to disable DBIO on pre-G06.24 systems that are not running
SPR T9753AFN or later.
September 24, 2003
Updated TSM references to include OSM.
May 31, 2002
Moved notes to a new Notes for Replacing an Internal Mirrored Disk
Drive CRU page.
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Added a note stating that disk drives with different model numbers
cannot remain as a mirrored pair. (If you are upgrading disk drives,
you must upgrade the primary drive immediately after upgrading the
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