![](/images/new-backgrounds/1169970/16997099x1.webp)
This soft copy for use by IBM employees only.
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| IBM RAID Controller Configuration Ver 2.12 |
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| Adapter in Slot 1 |
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| Advanced Functions |
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| Ch | 1 | Ch | 2 | ||||||
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| 1. Help | Bay |
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| 2. Backup config. to diskette | Array | Array | |||||||
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| 3. Restore config. to diskette | |||||||||
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| 4. Change write policy | 1 | 1 | |||||||
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| 5. Format drive |
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| 6. Change RAID parameters | 2 | 2 | |||||||
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| 7. Exit |
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| 3 FMT | 3 | ||||||||
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| 4 FMT | 4 | ||||||
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| 5 FMT | 5 | ||||||
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| 6 FMT |
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| 7 | 7 | ||||||
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Figure 30. RAID Configuration Program - DASD Formatting |
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Change RAID Parameters: The panel for changing RAID parameters is shown in Figure 31.
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| IBM RAID Controller Configuration Ver 2.12 |
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| Adapter in Slot 1 |
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| Advanced Functions |
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| Ch |
| 1 | Ch |
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| 1. Help |
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| Bay |
| Bay |
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| 2. Backup Config. to Diskette | Array | Array |
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| 3. Restore Config. to Diskette |
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| 4. Change Write Policy | 1 | 1 |
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| 5. Format Drive |
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| 6. Change RAID parameters | 2 | 2 |
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| 7. Exit |
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| 3 RDY | 3 |
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| Stripe | Rebuild | Parity | Read | 4 RDY | 4 |
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| Unit Size Priority Placement Ahead |
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| 8K | High |
| RA | On | 5 RDY | 5 |
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| 8K | 1 Equal | 1 | RA | 1 On | 6 RDY | 6 |
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| 16K | 2 High | 2 | LS | 2 Off |
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| 32K | 3 Low |
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| 64K |
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Figure 31. | RAID Configuration Program - Change RAID parameters |
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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.
40PC Server and Windows NT Integration Guide