Selecting Sequential Or Random Optimization - Sun Microsystems StorEdge 3000 Series Installation, Operation And Service Manual

6. Select the controller on which you want to add a host ID.
7. Choose an ID number for that controller.
A confirmation dialog is displayed.
Note – To create a total of 128 LUNs, you must have a minimum of four host IDs
(two each for Channels 1 and 3) and might have a maximum of six host IDs (two
each for Channels 1 and 2, and 3). Each host ID can have up to 32 partitions, which
are then mapped to LUNs to create a total not to exceed 128.
8. Choose Yes to confirm.
9. From the Main Menu, choose "system Functions → Reset controller" and then
choose Yes to confirm.
The configuration change takes effect only after the controller is reset.
5.6.4

Selecting Sequential or Random Optimization

Before creating or modifying logical drives, you should select the optimization mode
for all logical drives you create. The optimization mode determines the block size
used when writing data to the drives in an array.
Sequential I/O uses large blocks of data:
I
I
I
Random I/O uses small blocks of data:
I
I
I
128 Kbyte for RAID 0, 1, and 5 logical drives
16 Kbyte for RAID 3 logical drives
32 Kbyte for RAID 0, 1, and 5 logical drives
4 Kbyte for RAID 3 logical drives
Chapter 5 First-Time Configuration 5-11