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13-2 SPARC Enterprise M8000/M9000 Servers Service Manual • October 2012
The PHP function does not enable active maintenance of IOUAs. Perform either hot
maintenance or cold maintenance.
■ Link card
If PCI cards mounted in all the IOUs are not sufficient in number, this card serves as a
card for connecting an external I/O expansion unit that is used for mounting additional
PCI cards.
The PHP function enables active maintenance of link cards.
A filler panel may be mounted in a PCICS.
Note – To activate a hardware RAID boot volume after replacing a RAID-capable IOUA on
an M8000/M9000 server, see Section 13.5, “Reactivating a Hardware RAID Boot Volume”
on page 13-25.
FIGURE 13-1 indicates the PCI slot locations in an IOU cabinet. For information on the IOU
mounting locations, see
FIGURE 7-1 to FIGURE 7-5 in Chapter 7.