The ability to divide a cache into different areas and allow each area to perform its own tasks without interference from other cache segments. The locking together of the rotation of disks in an array to increase the efficiency of controller optimisation and increase data throughput rates. The unit amount of contiguous data made up of the associated chunks from each disk across a RAID set. Describes adjusting the partition tables at installation time to ensure that the volume boundary is an exact multiple of the stripe size. If this is not the case, then many volume operations will involve the preceding and following stripes, reducing performance.
Stripe alignment is only necessary for independent RAID systems.
The mechanism by which independent RAID systems minimise the write penalty. A cache is used to collect chunks of write data with the aim of collecting entire stripes which then allows data and ECC to be written to disk without additional disk read operations. The scenario where data fails to be written to one or more disks in an independent RAID, leading to an eventual data corruption when that data or ECC is next accessed. A mechanism where write data is also written to a logging disk which allows an independent RAID to recover from a power loss in mid-write. Has a performance impact, and is not normally on a volume in the same RAID subsystem.