NonStop NS14000 Series Planning Guide (H06.13+)

• The NonStop NS14000 series system supports only configurations with two VIO enclosures:
With four Fibre Channel ports and two FCDMs, the primary Fibre Channel port resides
in VIO enclosure module 2, and the backup Fibre Channel port resides in VIO enclosure
module 3. (See the example configuration in Figure 15 (page 77).)
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◦ With eight Fibre Channel ports and four FCDMs, the primary Fibre Channel ports reside
in VIO enclosure module 2, and the backup Fibre Channel ports resides in VIO enclosure
module 3. (See the example configuration in Figure 16 (page 78).)
• Daisy-chain configurations follow the same configuration restrictions and rules that apply to
configurations that are not daisy-chained. (See “Daisy-Chain Configurations” (page 80).)
• FCDMs containing mirrored volumes must be installed in separate daisy chains.
• Daisy-chained configurations require that all FCDMs reside in the same cabinet and be
physically grouped together.
• Daisy-chain configurations require an ID expander harness with terminators for proper FCDM
and disk drive identification.
Example Configurations of the VIO Enclosures and Fibre Channel Disk Modules
This section provides various example configurations between Fibre Channel ports on the VIO
enclosures and Fibre Channel disk modules.
NOTE: Although it is not a requirement for fault tolerance to house the primary and mirror disk
drives in separate FCDMs, the example configurations show FCDMs housing only primary or mirror
drives, mainly for simplicity in keeping track of the physical locations of the drives.
• “Four Fibre Channel Ports, Two FCDMs, Two VIO Enclosures” (page 77) shows example cable
connections between four Fibre Channel ports (two on each VIO enclosure) and the primary
and mirror Fibre Channel disk modules.
• “Eight Fibre Channel Ports, Four FCDMs, Two VIO Enclosures” (page 78)shows example cable
connections between eight Fibre Channel ports (four on each VIO enclosure) and the two sets
of primary and mirror Fibre Channel disk modules.
• “Twelve Fibre Channel Ports, Six FCDMs, Two VIO Enclosures” (page 79) shows example
cable connections between twelve Fibre Channel ports (six on each VIO enclosure) and the
three sets of primary and mirror Fibre Channel disk modules.
• “Sixteen Fibre Channel Ports, Eight FCDMs, Two VIO Enclosures” (page 80) shows example
cable connections between sixteen Fibre Channel ports (eight on each VIO enclosure) and
the four sets of primary and mirror Fibre Channel disk modules.
76 System Configuration Guidelines