Controllers - IBM DS5100 Installation, User's, And Maintenance Manual

Table 3. Maximum number of storage expansion enclosures (continued)
Enclosure type
EXP5060
Notes:
1. Requires firmware version
7.60.13.05, or higher.
2. Maximum configuration requires
the Attach up to eight EXP5060
feature.
3. The Attach up to eight EXP5060
feature activation requires IO to
the subsystem be quiesce.
4. The Attach up to eight EXP5060
feature pack does not support any
other type of enclosure besides
the EXP5060. Disconnect any
EXP5000/EXP810 expansion
enclosures before activating the
Attach up to eight EXP5060
feature pack.
EXP5000 and EXP5060

Controllers

The DS5100 and DS5300 has two RAID controllers. Both controllers are identical
and interchangeable. The controllers install from the rear of the storage subsystem.
The upper controller is controller A; the lower controller is controller B. All
connections to the hosts and the drives in the storage configuration are through the
controllers. Figure 3 on page 11 shows the controllers in the DS5100 and DS5300.
Note: Although both RAID controller units (A and B) in the DS5100 and DS5300
10
IBM System Storage DS5100 and DS5300 Storage Subsystem: Installation, User's, and Maintenance Guide
Maximum number of enclosures in
a redundant DS5100 and DS5300
drive channel pair
2
1 EXP5060
3 EXP5000
are identical, they are seated in the DS5100 and DS5300 chassis in opposite
orientations. As shown in Figure 3 on page 11, the controller units must be
inserted in the DS5100 and DS5300 so that the latches of each controller
are on the exterior of the DS5100 and DS5300 chassis. The latches on
controller A line up with the top side of the DS5100 and DS5300 chassis; the
latches on controller B line up with the bottom side of the DS5100 and
DS5300 chassis.
Maximum number of enclosures in
a DS5100 and DS5300 subsystem
8
Varies depending on the number of
EXP5060 and EXP5000 expansion
enclosures that are connected to
each of the four DS5100/DS5300
drive channels.