HP 3PAR StoreServ 7450 2-node HP 3PAR Command Line Interface Reference (OS 3.1 - Page 268

... 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 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