HP Dc5850 AHCI and RAID on HP Compaq dc5850 Business PCs - Page 7
the user interface sends a notification so the failed hard drive can be replaced. No user
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First Disk Data Segment 5 Data Segment 6 Data Segment 7 Data Segment 8 Second Disk Data Segment 5 Data Segment 6 Data Segment 7 Data Segment 8 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. This table shows how information is duplicated in both hard drives. The size of the strips is mostly irrelevant and not a configurable option. To better illustrate the concept of RAID 1 and mirroring, the following figure shows how a sequence of data "ABCD..." is stored in a RAID 1 volume. In this example, each letter represents a data segment. The graphic shows how the various pieces are replicated for both of the hard drives; hence, if any one member of the RAID 1 volume fails, the information is kept in the surviving members. After a hard drive failure, the user interface sends a notification so the failed hard drive can be replaced. No user information is lost in this scenario. Figure 3 Reliability: RAID 1 - Mirroring 7