Dot Hill Systems II 200 FC service manual Connect expansion units, if needed

Table 5-1Example Point-to-Point Configuration With Two Logical Drives in a Dual- Controller Array

	Logical	LUN	Channel	Primary ID	Secondary
Task	Drive	IDs	Number	Number	ID Number
Map 32 partitions of LG 0 to	LG 0	0-31	0	40	N/A
CH 0
Duplicate-map 32 partitions of	LG 0	0-31	1	41	N/A
LG 0 to CH 1
Map 32 partitions of LG 1 to	LG 1	0-31	4	N/A	50
CH 4
Duplicate-map 32 partitions of	LG 1	0-31	5	N/A	51
LG 1 to CH 5

Perform the following steps to set up a typical point-to-point SAN configuration based on Figure 5-1and Figure 5-2.

1.Check the position of installed SFPs. Move them as necessary to support the connections needed.

2.Connect expansion units, if needed.

3.Create at least two logical drives (logical drive 0 and logical drive 1) and configure spare drives.

Leave half of the logical drives assigned to the primary controller (default assignment). Assign the other half of the logical drives to the secondary controller to load-balance the I/O.

4.Create up to 32 partitions (LUNs) in each logical drive.

5.Change the Fibre Connection Option to Point to point only (view and edit Configuration parameters →Host-side SCSI Parameters →Fibre Connections Option).

6.For ease of use in configuring LUNs, change the host IDs on the four channels to the following assignments:

Channel 0: PID 40 (assigned to the primary controller)

Channel 1: PID 41 (assigned to the primary controller)

Channel 4: SID 50 (assigned to the secondary controller)

Channel 5: SID 51 (assigned to the secondary controller)

Caution – Do not use the command, Loop preferred, otherwise point to point. This command is reserved for special use and should be used only if directed by technical support.

Chapter 5 Configuration Overview 5-9