AHCI and RAID on HP Elite 8100 Business PCs

Basic RAID Types

This section provides a brief explanation of the supported RAID configurations for HP Elite 8100 Business

PCs

RAID 0 with two hard drives (Striped)

Even though HP supports RAID 0, it is not the recommended configuration for business PC users. Lack of

redundancy causes less than half the reliability of a single hard drive system since the Mean Time

Between Failure (MTBF) of RAID 0 is equal to the MTBF of an individual drive, divided by the number of

drives.

Table 2 RAID 0 with two hard drives (Striped)

In the previous table, each “Data Segment n” represents a group of data, known as a strip. In this case,

each row represents a stripe. RAID 0 represented in the table above shows how information is segmented,

made into chunks or strips, and stored across the stripes of the hard drive members of this RAID volume.

To better illustrate the concept of RAID 0 and striping, the following graphic shows how a sequence of

data “ABCD...” is stored in a RAID 0 mode. In this example, each letter represents a segment or strip. The

graphic shows how the various pieces of the information go to different hard drives. If any segment of

RAID 0 fails, all information from all members is lost.

First Disk Second Disk

Data Segment 1 Data Segment 2

Data Segment 3 Data Segment 4

Data Segment 5 Data Segment 6

Data Segment 7 Data Segment 8

Data Segment 9 Data Segment 10

Data Segment 11 Data Segment 12

Data Segment 13 Data Segment 14

Data Segment 15 Data Segment 16