IBM EXN1000, Hardware And Service Manual, Page: 41 / 94

The speed setting must be set before you power on the expansion unit.
Supported disk drives
For the types of disks the EXN1000 expansion unit supports, visit the
following Web site:
www.ibm.com/storage/nas/
Note: You should not mix different drive types in the same expansion unit.
Drive bay requirements
For enclosure services monitoring to work, drive bays 0 and 1 must contain a
disk. In addition, the EXN1000 expansion unit must be populated with at least
5 hard disk drives to ensure proper operation.
Attention: All drive bays in the expansion must contain either a hard disk
drive or a drive blank cover to maintain proper air flow and cooling.
The 14 drive bays in the EXN1000 expansion unit are numbered 0 through 13
from right to left, as shown in Figure 1 on page 8. Hard disk drives should be
populated in adjacent drive bays in the expansion unit in this sequence,
beginning with drive bay 0.
The N series storage system uses the enclosure services monitoring method to
monitor environmental conditions of the EXN1000 expansion unit. Enclosure
services conditions are communicated to the N series storage system through
the AT-FCX module.
The following table describes the three stages of enclosure services
monitoring.
Figure 4. EXN1000 speed setting switch
Chapter 1. Preparing for the installation
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