Dot Hill Systems II 200 FC service manual Do not use force when placing a cap on an ear

Ensure that the loop IDs of expansion units do not duplicate the loop IDs of other connected expansion units or RAID arrays.

The ID switch offers eight ID ranges. Each range contains 16 IDs (the last four IDs in each range are ignored). These ranges are shown in Table 4-3.

Table 4-3ID Switch Settings for Expansion Units

ID Switch Setting Range of IDs

00–15

116–31

232–47

348–63

464–79

580–95

696–111

7112–125

For an example of properly configured loop IDs, consider the configurations shown in Figure 4-7and Figure 4-8. You must make sure the RAID array and each of the two expansion units have been assigned different loop IDs. Set the loop ID switches so that the RAID array is assigned loop ID 0, expansion unit 1 has loop ID 1, and expansion unit 2 has loop ID 2. The range of IDs assigned to the drives is shown in Table 4-4.

Table 4-4Sample Array and Expansion Units With Different Loop IDs and Drive IDs

Fibre Channel	Loop ID Switch	Range of
Device	Setting	Drive IDs
RAID array	0	0–15
Expansion unit 1	1	16–31
Expansion unit 2	2	32–47

5.Prepare the plastic left ear cap for replacement by aligning the inside round notches of the cap with the round cylindrical posts (ball studs) on the ear.

6.Push the top and bottom of the ear cap onto the ear, pressing in on the top side toward the center of the array first.

7.Continue pushing the top and bottom of the ear cap onto the ear, pressing on the side toward the outside of the array.

Do not use force when placing a cap on an ear.

Chapter 4 Connecting Your Array 4-15