84 Sun Fire V890 Server Owner’s Guide • September 2004
It is also possible to set up a split backplane configuration, in which, unlike the full
backplane configuration, there is no cabling between the base and expansion
backplanes. In the dual-loop, split backplane configuration, there are four
independent loops, two on each backplane; this provides redundancy of disks, data
paths, host adapters, and backplanes.
Split backplane configurations must be set up by a qualified service technician. For
details, see the “Split Backplane Configurations” appendix in the Sun Fire V890
Server Service Manual.
Configuration Rules
■ The FC-AL disk backplane requires low-profile (1.0-inch) disk drives.
■ The optional expansion disk backplane is installed above the base backplane.
Caution – All internal options (except disk drives and power supplies) must be
installed only by qualified service personnel. For information about installing or
removing an FC-AL disk backplane, see the Sun Fire V890 Server Service Manual,
which is included on the Sun Fire V890 Documentation CD.
About Internal Disk Drives
The Sun Fire V890 mass storage subsystem accommodates up to 12 low-profile
(1.0-inch) FC-AL disk drives. Disks are available in various storage capacities. As of
the time of writing, the maximum internal storage capacity is 1.75 terabytes (using
twelve 146-Gbyte disks), with larger amounts possible as disk storage capacities
continue to grow.
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