Adaptec 5325301507 Administration Guide - Page 82
Integrating Orphan Expansion Units, Property, Description
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Expansion Arrays multiple drive failures in a single RAID. See "RAID Groups" on page 54 for information on how to avoid this. Cautions • Host server disk drives and expansion array disk drives are logically interchangeable, but they are not physically interchangeable. That is, you cannot physically take a disk drive from an expansion array and place it in a host SnapServer. SnapServer disk drives contain GuardianOS-specific data that is lacking on expansion array disk drives. • Do not mix drives of different capacity in a RAID 1, 5, 6, or 10. The redundancy schemes in these RAID types limit capacity usage in all member drives to the capacity of the smallest member disk drive. For example, if a RAID consists of one 160 GB disk drive and three 250 GB disk drives, the RAID can use only 160 GB on each disk drive. In this case, the total RAID capacity is approximately 640 GB (4 x 160) rather than the expected 910 GB (160 + [3 x 250]). • Do not mix drives of different rotational speeds in the same column. See "Adding New Disk Drives to Increase Capacity" on page 68 for illustrations of supported and unsupported drive configurations. Integrating Orphan Expansion Units Expansion units that have been discovered by GuardianOS (e.g., are physically connected to the SnapServer) but have not been integrated with the SnapServer are listed in the Orphan Expansion Units table: Property Expansion Unit Status Serial Number Origin Description A description of the unit The status of the unit (e.g., orphan) The expansion unit's serial number The serial number of the server with which the expansion unit was last incorporated If you want to use the expansion unit with the SnapServer, click the check box next to the orphan expansion unit you want to integrate, and click OK. Caution Before integrating an orphan expansion unit, be sure that it is compatible with the SnapServer (e.g., data on the expansion unit is compatible with the SnapServer configuration, Unicode settings are the same, etc.). 66 SnapServer Administrator Guide
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