HP 3PAR User's Guide Page 268

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... marking pd wwn [20000000870042F6] id [22] as usable for ld allocation
... marking pd wwn [2000000087007E6D] id [23] as usable for ld allocation
servicemag resume 2 0.0 –– Succeeded
NOTES
Issuing the servicemag command results in chunklet relocation that causes a dip in throughput.
When a servicemag command is issued with the log option, all chunklets on the disks in
the drive magazine being serviced are marked as normal,smag. This state indicates an
active servicemag operation on the disks.
Any I/O on the chunklets marked normal,smag, changes the states to logging and I/O
is written to the logging logical disks.
Issuing the servicemag resume command causes playback of the log. Any chunklets in
the logging state enter playback state as their data is played back. After all the data is
played back, the chunklets return to the normal state. Any chunklets in the normal,smag
state return directly to the normal state.
Chunklet states can be checked by issuing either the showldch or showpdch commands
(see “Show Commands” (page 350)).
By default, the servicemag command relocates all chunklets in the magazine to destinations
starting first with local (such as on the owning node for the logical disk) spares, then local
free space, then remote spare and finally remote free space.
In the case when a drive needs to be replaced, the -log option should always be used in
conjunction with the-pdid option.
Replacing disks that have not had data completely relocated can lead to data loss. If the drives
need to be replaced, the -log option should be used in conjunction with the -pdid option.
For the servicemag start command only, instead of using the <cage_ID> <magazine>
specifiers, the disk(s) to be serviced can also be specified using the -pdid option. The
advantage is that the servicemag resume command will dismiss the old PDID when it
successfully completes.
268 Service Commands
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