Dual-ported drive channels
Each controller has four drive channels; each drive channel has two fibre
channel ports. The drive channels are used to connect storage expansion
enclosures to the RAID controllers on the DS5100 and DS5300.
Attention:
Before you power on the DS5100 and DS5300, the storage
subsystem must be cabled to at least one storage expansion enclosure
populated with the minimum number of drives for the storage expansion
enclosure. Otherwise, the DS5100 and DS5300 controllers do not
successfully complete the power-on process and operate optimally.
Two drive channels (one from each controller) are used to form a redundant
drive channel pair. Each drive channel pair supports up to a maximum of
RS-232
serial port
Ethernet ports
Dual-ported
drive channels
AC
power
Controller A
Strain-relief
clamp
AC
power
Strain-relief
clamp
Ethernet ports
RS-232
serial port
Dual-ported
drive channels
Controller B
Fibre Channel host ports
Fibre Channel host ports
Figure 4. Fibre Channel Controller connections
iSCSI host channels
RS-232
serial port
Ethernet ports
Dual-ported
drive channels
AC
power
Controller A
Strain-relief
clamp
AC
power
Strain-relief
clamp
Ethernet ports
RS-232
serial port
Dual-ported
drive channels
Controller B
Figure 5. iSCSI Controller connections
12
IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User’s, and Maintenance Guide