Which configuration offers full fault tolerance using seven SCSI drives?

Which configuration offers full fault tolerance using seven SCSI drives?

• A. RAID 0+1
• B. RAID 0
• C. RAID 1
• D. RAID 5

Answer: (D)

RAID 5 is recognized for providing full fault tolerance by utilizing a combination of data striping and parity. In a RAID 5 configuration, data is spread across multiple disks along with parity information that can be used to reconstruct data in the event of a single drive failure. This means that even if one of the SCSI drives fails, the system can continue to operate without data loss, as the lost information can be recovered using the parity data stored on the other drives. In a setup with seven drives, RAID 5 would allow for the loss of one drive without impacting the overall system performance or data integrity, making it an efficient choice for fault tolerance. Moreover, the remaining drives can still maintain data accessibility, which is a key factor in server environments where uptime and data availability are critical. Other RAID configurations do not provide the same level of fault tolerance or have different trade-offs. For instance, RAID 0 does not offer any redundancy; RAID 1 mirrors data but requires twice the number of drives for the amount of usable space, and RAID 0+1, while providing redundancy, does not maximize the available storage capacity as efficiently as RAID 5. Therefore, RAID 5 is the most appropriate choice for achieving full fault tolerance in this

RAID 5 is recognized for providing full fault tolerance by utilizing a combination of data striping and parity. In a RAID 5 configuration, data is spread across multiple disks along with parity information that can be used to reconstruct data in the event of a single drive failure. This means that even if one of the SCSI drives fails, the system can continue to operate without data loss, as the lost information can be recovered using the parity data stored on the other drives.

In a setup with seven drives, RAID 5 would allow for the loss of one drive without impacting the overall system performance or data integrity, making it an efficient choice for fault tolerance. Moreover, the remaining drives can still maintain data accessibility, which is a key factor in server environments where uptime and data availability are critical.

Other RAID configurations do not provide the same level of fault tolerance or have different trade-offs. For instance, RAID 0 does not offer any redundancy; RAID 1 mirrors data but requires twice the number of drives for the amount of usable space, and RAID 0+1, while providing redundancy, does not maximize the available storage capacity as efficiently as RAID 5. Therefore, RAID 5 is the most appropriate choice for achieving full fault tolerance in this