This soft copy for use by IBM employees only.
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IBM RAID Controller Configuration Ver 2.12
Adapter in Slot 1
┌───────────────────────────────┐ ┌───────────┐ ┌───────────┐
Advanced Functions │ │┌─────────┐│ │┌─────────┐│
├───────────────────────────────┤ │└Ch 1┘│ │└Ch 2┘│
│1. Help │ │┌─Bay │┌─Bay
│2. Backup config. to diskette │ ││ Array ──┐│ ││ Array ──┐│
│3. Restore config. to diskette │ │ ┌─────┐ │ │ ┌─────┐ │
│4. Change write policy │ │1 └ │1 └
│5. Format drive │ │ ┌─────┐ │ │ ┌─────┐ │
│6. Change RAID parameters │ │2 └ │2 └
│7. Exit │ ┌─────┐ │ │ ┌─────┐ │
└───────────────────────────────┘ │3 └ FMT ┘ │3 └
│ ┌─────┐ │ │ ┌─────┐ │
│4 └ FMT ┘ │4 └
│ ┌─────┐ │ │ ┌─────┐ │
│5 └ FMT ┘ │5 └
│ ┌─────┐ │ │ ┌─────┐ │
│6 └ FMT │6 └
│ ┌─────┐ │ │ ┌─────┐ │
│7 ┘ │ │7 ┘ │
└───────────┘ └───────────┘
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Figure 30. RAID Configuration Program - DASD Formatting

Change RAID Parameters:

The panel for changing RAID parameters is shown in

Figure 31.

 
IBM RAID Controller Configuration Ver 2.12
Adapter in Slot 1
┌───────────────────────────────┐ ┌───────────┐ ┌───────────┐
Advanced Functions │ │┌─────────┐│ │┌─────────┐│
├───────────────────────────────┤ │└Ch 1┘│ │└Ch 2┘│
│1. Help │ │┌─Bay │ │┌─Bay
│2. Backup Config. to Diskette ││ Array ──┐│ ││ Array ──┐│
│3. Restore Config. to Diskette │ ┌─────┐ │ │ ┌─────┐ │
│4. Change Write Policy │1 └ │1 └
│5. Format Drive ┌─────┐ │ │ ┌─────┐ │
│6. Change RAID parameters │2 └ │2 └
│7. Exit │ │ ┌─────┐ │ │ ┌─────┐ │
└───────────────────────────────┘ │3 └ RDY ┘ │3 └
┌─────────┐ ┌────────���┐ ┌─────────┐ ┌───────┐ ┌─────┐ │ │ ┌─────┐ │
│Stripe │ │Rebuild │Parity │ │Read │ │4 RDY │4
│Unit Size│ │Priority │ │Placement│ │Ahead ┌─────┐ │ │ ┌─────┐ │
8K │ │ High │ │ RA │ │ On │5 └ RDY ┘ │5 └
├─────────┤ ├─────────┤ ├─────────┤ ├───────┤ ┌─────┐ │ │ ┌─────┐ │
8K │ │1 Equal │ │1 RA │ │1 On │6 └ RDY ┘ │6 └
16K │ │2 High │ │2 LS │ │2 Off ┌─────┐ │ │ ┌─────┐ │
32K │ │3 Low │ └─────────┘ └───────┘ │7 └ │7 └
64K │ └─────────┘ └───────────┘ └───────────┘
└─────────┘
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Figure 31. RAID Configuration Program - Change RAID parameters

The following fields are configurable:

Stripe Unit Size

This parameter should be chosen such that the stripe unit size is close to the

size of the system I/O requests. The default is set to 8 KB.

Note: Once data is stored in the logical drive, the stripe unit cannot be

changed without destroying data in the logical drives.

40 PC Server and Windows NT Integration Guide