Adding disks to an existing array

The IBM® SAS RAID controller supports adding disks to existing RAID level 5 or 6 disk arrays. Adding disks to an existing RAID 5 or 6 array can dynamically increase the capacity of a disk array while preserving existing data in the disk array. Extensive use of this feature, however, will result in a performance penalty because the data will not be restriped.

1. Run the iprconfig utility by typing iprconfig.
2. Select Work with disk arrays.
3. Select Add a device to a disk array.
4. Select the disk array to which you want to add the disks.
5. Select the eligible disks to be included into the disk array, and then press Enter.
   Attention: All data on the selected drives will be lost when the disks are added to the existing array.
   If a particular disk is not included in the list, it may not be a candidate that can be added to the array because of one or more of the following reasons:

   • The disk's capacity is less than that of the smallest disk already in the array.
   • The disk has not been formatted for Advanced Function.
   • The disk belongs to another disk array or is configured as a Hot Spare.
6. To include the disks, press Enter. To exclude the disks from the disk array, type q to cancel.