HP Surestore Disk Array 12h - And FC60 Advanced User's Manual page 111
Hp surestore e disk array fc60 - (english) advanced user's guide
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- Service manual (746 pages) ,
- User manual (310 pages) ,
- System administrator manual (279 pages)
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chapter for part numbers). Fibre optic cables longer than 100 m must be custom-fabricated
for each implementation.
Like the basic topology, both high availability versions (two controller modules per disk
array) and non-high availability versions (one controller module per disk array) of this
topology can be implemented.
For high availability implementations, up to four disk arrays with two controller modules
per disk array can be connected to an HP Fibre Channel-AL Hub. The two Fibre Channel
I/O adapters installed in the host connect to the two remaining HP Fibre Channel-AL Hub
ports. If one controller module fails, ownership of its LUNs can transfer automatically to
the remaining operational controller module through the other Fibre Channel adapter. If a
primary and an alternate path have been configured in LVM, LVM can switch automatically
and transparently to the alternate path. Likewise, if one host adapter fails, or if one Fibre
Channel cable from the host to the HP Fibre Channel-AL Hub or from the HP Fibre
Channel-AL Hub to one of the dual controller module disk array fails, that disk array can
still be accessed via the alternate hardware path. The HP Fibre Channel-AL Hub is a single
point of failure in this topology. If the HP Fibre Channel-AL Hub fails, no communication
between the host and any of the disk arrays is possible.
For non-high availability, up to eight single-controller module disk arrays can be attached
to the HP Fibre Channel-AL Hub. If the single controller module or the Fibre Channel cable
between the HP Fibre Channel-AL Hub and an array fails, no I/O operations are possible
between the host and the disk array with the failed controller module. If one Fibre Channel
adapter fails in the host, the disk array can still be accessed via the hardware path through
the other operational Fibre Channel adapter. If the HP Fibre Channel-AL Hub fails, no
communication between the host and any disk arrays is possible.
Topologies for HP-UX
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