Filter
Top Products
• FC-AL port B1 is the outbound port to another Fibre Channel disk module
• In a daisy-chain configuration, the ID expander harness determines the enclosure number.
Enclosure 1 is always at the bottom of the chain.
• FCSAs can be installed in slots 1 through 5 in an IOAM.
• G4SAs can be installed in slots 1 through 5 in an IOAM.
• In systems with two or more cabinets, primary and mirror Fibre Channel disk modules
reside in separate cabinets to prevent application or system outage if a power outage affects
one cabinet.
• With primary and mirror Fibre Channel disk modules in the same cabinet, the primary Fibre
Channel disk module resides in a lower U than the mirror Fibre Channel disk module.
• Fibre Channel disk drives are configured with dual paths.
• Where possible, FCSAs and Fibre Channel disk modules are configured with four FCSAs
and four Fibre Channel disk modules for maximum fault tolerance. If FCSAs are not in
groups of four, the remaining FCSAs and Fibre Channel disk modules can be configured in
other fault-tolerant configurations such as with two FCSAs and two Fibre Channel disk
modules or four FCSAs and three Fibre Channel disk modules.
• In systems with one IOAM enclosure:
— With two FCSAs and two Fibre Channel disk modules, the primary FCSA resides in
module 2 of the IOAM enclosure, and the backup FCSA resides in module 3. (See the
example configuration in “Two FCSAs, Two FCDMs, One IOAM Enclosure” (page 64).)
— With four FCSAs and four Fibre Channel disk modules, FCSA 1 and FCSA 2 reside in
module 2 of the IOAM enclosure, and FCSA 3 and FCSA 4 reside in module 3. (See the
example configuration in “Four FCSAs, Four FCDMs, One IOAM Enclosure” (page 64).)
• In systems with two or more IOAM enclosures
— With two FCSAs and two Fibre Channel disk modules, the primary FCSA resides in
IOAM enclosure 1, and the backup FCSA resides in IOAM enclosure 2. (See the example
configuration in “Two FCSAs, Two FCDMs, Two IOAM Enclosures” (page 65).)
— With four FCSAs and four Fibre Channel disk modules, FCSA 1 and FCSA 2 reside in
IOAM enclosure 1, and FCSA 3 and FCSA 4 reside in IOAM enclosure 2. (See the example
configuration in “Four FCSAs, Four FCDMs, Two IOAM Enclosures” (page 66).)
• Daisy-chain configurations follow the same configuration restrictions and rules that apply
to configurations that are not daisy-chained. (See “Daisy-Chain Configurations” (page 67).)
• Fibre Channel disk modules containing mirrored volumes must be installed in separate
daisy chains.
• Daisy-chained configurations require that all Fibre Channel disk modules reside in the same
cabinet and be physically grouped together.
• Daisy-chain configurations require an ID expander harness with terminators for proper
Fibre Channel disk module and disk drive identification.
• After you connect all Fibre Channel disk modules in configurations of four FCSAs and four
Fibre Channel disk modules, yet three Fibre Channel disk modules remain not connected,
connect them to the four FCSAs. (See the example configuration in “Four FCSAs, Three
FCDMs, One IOAM Enclosure” (page 69).)
Example Configurations of the IOAM Enclosure and Fibre Channel Disk Module
These subsections show various example configurations of FCSA controllers and Fibre Channel
disk modules with IOAM enclosures.
Fibre Channel Devices 63