Before you install one or more disk shelves in a rack, you need to understand the following information:
Each disk shelf in a loop must have a unique ID. A valid shelf ID is from 1 through 7, with disk shelf 1 connected to the storage appliance. If you install a second or third loop of disk shelves, the disk shelf IDs in each loop must start at 1. The ID of a single disk shelf must be 1.
Note
When connecting a DS14 or DS14mk2 FC to a preexisting mixed-shelf loop, the DS14 or DS14mk2 FC disk shelf ID must be higher than any of the disk shelves already in the loop.
Caution
A DS14 or DS14mk2 FC with ESH modules does not support mixed-shelf loops. Disk shelves with LRC modules must not be present in a loop with ESH modules.
Each disk shelf is shipped with its assigned ID set on its back panel. You must ensure that the disk shelf has the correct ID number on the label. The ID label is on the right side of the disk shelf, as shown in the following illustration.
Network Appliance sets the disk shelf IDs at the factory on configured systems, using an ID switch on the back panel. If you order additional disk shelves, you must set the disk shelf ID.
Note
If you enter a shelf ID that is not from 1 through 7, the drive addresses default to those of a shelf with the ID switch set to 7 even though the Shelf ID indicator in the front operation panel displays a dash (-).
The example in the following illustration shows a DS14mk2 FC with the disk shelf ID set to 1.
In addition to identifying the disk shelf ID and the direction of the drive bays, the ID label on the right side of the disk shelf includes the loop ID. The loop ID identifies the disks in the disk shelf. The last sheet of the quick reference cards that come with your disk shelf shows the seven disk shelf IDs and their corresponding loop IDs.
Note
For ESH A, the loop ID is in descending order, and for ESH B, the loop ID is in ascending order.
The DS14 and DS14mk2 FC support 18-GB, 36-GB, 72-GB, and 144-GB block checksum disk drives.
For enclosure services monitoring to work, drive bays 0 and 1 must contain a disk.
This requirement is posted on the label on the left flange of the disk shelf. The 14 drive bays in the disk shelf are numbered 0 through 13 from right to left, as shown in the following illustration.
The storage appliance uses the enclosure services monitoring method to monitor environmental conditions of the disk shelf. Enclosure services conditions are communicated to the storage appliance through the LRC/ESH module.
The following table describes the three stages of enclosure services monitoring.
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Part No. 210-00592
File: install2.htm
Last updated: 12/03/03 13:48:50