Dot Hill Systems SANnet II 200 Service Manual download pdf (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

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 209 210

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Dot Hill Systems SANnet II 200 Service Manual Page 63