Table of Contents
Advertisement
Redundant drive channel pair
Each controller on the DS4200 Express has a drive channel that contains two ports.
The storage expansion enclosures that are connected to these two ports form a
drive channel (also referred to as drive loop in certain DS4000 storage subsystem
models). The maximum number of hard drives that can be installed in one drive
channel, including the 16 E-DDMs in the DS4200 Express internal drive slots, is
112. One drive channel from each controller combines to form a redundant drive
channel pair.
Figure 37 on page 56 shows an example of a redundant drive channel pair. If any
component of the drive channel fails, the RAID controllers can still access the
storage expansion enclosures in the redundant drive channel pair.
Note: In the following drive cabling figures, the DS4200 Express graphics are
simplified to show only the drive ports of each controller.
55
Chapter 3. Cabling the storage subsystem
Advertisement
Table of Contents
