NonStop NS14000 Planning Guide (H06.10+)

Requirements for Daisy-Chain1Daisy-Chained Disks Not
Recommended
Daisy-Chained Disks Recommended
Two Fibre Channel disk modules
minimum, with four Fibre Channel
disk modules maximum per daisy
chain.
1 See“Fibre Channel Devices” (page 85).
This illustration shows an example of cable connections between two Fibre Channel ports (one
on each VIO enclosure) and four Fibre Channel disk modules in a single daisy-chain configuration:
Two VIO enclosures, four Fibre Channel ports, and four Fibre Channel disk modules with an ID
expander do not provide fault-tolerant mirrored disk storage. Installing each mirrored disk in
the same corresponding FCDM and bay number as its primary disk is not required, but it is
recommend to simplify the physical management and identification of the disks.
This table lists the Fibre Channel port group-module-slot-port (GMSP) and disk
group-module-shelf-bay (GMSB) identification for the factory-default system disk locations in
a daisy-chained configuration:
Disk GMSB*Fibre Channel Port GMSPDisk Volume Name
100.211.101100.2.1.1 and 100.3.1.1$SYSTEM
100.211.102100.2.1.1 and 100.3.1.1$DSMSCM
100.211.103100.2.1.1 and 100.3.1.1$AUDIT
Fibre Channel Devices 95