
Chapter 4. Logical configuration performance considerations 135
DS8800 extent pool configuration examples
This example represents a homogeneously configured DS8800 with four DA pairs and 24
ranks of the same SFF drive type that are all configured as RAID 5. Based on the specific
DS8800 hardware and rank configuration, the scheme typically becomes more complex for
the number of DA pairs, ranks, SFF or LFF drive enclosures, different RAID levels or drive
classes, spare distribution, and storage types. Each DA pair is typically populated with up to
six ranks before the next DA pair is used. Expect additional ranks on all DA pairs on a fully
populated ...