Dot Hill Systems II 200 FC - Manual (Page 63)

Chapter 4 Connecting Your Array 4-15
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.
For an example of properly configured loop IDs, consider the configurations shown in
Figure 4-7 and 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.
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.
Table 4-3 ID Switch Settings for Expansion Units
ID Switch Setting Range of IDs
0 0–15
1 16–31
2 32–47
3 48–63
4 64–79
5 80–95
6 96–111
7 112–125
Table 4-4 Sample Array and Expansion Units With Different Loop IDs and Drive
IDs
Fibre Channel
Device Loop ID Switch
Setting Range of
Drive IDs
RAID array 0 0–15
Expansion unit 1 1 16–31
Expansion unit 2 2 32–47