HP 347786-B21 Eight-Port SAS/SATA RAID Host Bus Adapter Installation Guide - Page 16

When selecting drives for the RAID 0 array, remember the following limitations: • Every drive in the array must be of the same type, either SATA (with extended command set support) or SAS (with SMART support). • Each drive must have 512-byte blocks. • Drives with removable media are not supported. • The array must have at least two drives but no more than eight drives. • RAID 0 arrays cannot have hot spare drives. 5. For each drive that you want in the array, move the cursor to the RAID Disk column for that drive and then press the + key, - key, or space bar. The No in that field changes to Yes, and the value in the Array Size field changes to reflect the new size of the array. 6. When you have finished configuring the array, press the C key and select Save changes. IMPORTANT: Be sure that the configuration is exactly as you want it. You cannot change the array after the number of drives in a RAID array is set. The configuration utility pauses while the array is created, and then returns to the Adapter Properties screen. 7. (Optional) To set this RAID 0 array as the boot volume, select the SAS Topology option on the Adapter Properties screen and then, on the screen that opens, set the boot volume. For more information, see "Selecting a boot disk" on page 18. Creating a RAID 1 array In a RAID 1 array, data is mirrored from one disk drive onto another one. This procedure increases reliability by providing protection against the failure of a single drive. For an even greater level of protection, you can configure a RAID 1 array with a hot spare. Then, if a drive fails, data that was on the failed drive is rebuilt to the hot spare from the mirrored drive. To create a RAID 1 array: 1. Open the configuration utility. 2. On the Adapter List screen, select an adapter. 3. On the Adapter Properties screen, select RAID Properties. • If the adapter already has a configured array, the View Array screen appears. Press the C key to create a new array, and then continue with the next step. • If the adapter does not yet have a configured array, the Select New Array Type screen appears. Continue with the next step. 4. On the Select New Array Type screen, select Create RAID 1 Array. The Create New Array screen appears. This screen lists the drives that you can use to create the RAID 1 array. When selecting drives for the RAID 1 array, remember the following limitations: • Every drive in the array must be of the same type, either SATA (with extended command set support) or SAS (with SMART support). • Each drive must have 512-byte blocks. • Drives with removable media are not supported. • A RAID 1 array must have two drives (three if you use a hot spare). 5. For each drive that you want in the array, move the cursor to the RAID Disk column for that drive and then press the + key, - key, or space bar. The No in that field changes to Yes, and the value in the Array Size field changes to reflect the new size of the array. When you add the first drive, the utility prompts you to keep existing data or overwrite existing data. • To keep any existing data on the first drive, press the M key. • To overwrite any data on the first drive, press the D key. SAS BIOS configuration utility 16