In the standard textbook classification of traditional RAID organizations,…

Concept

RAID comparisons distinguish data-transfer rate for one large request from the I/O rate for many independent requests. Byte-level striping makes every data disk participate in each large transfer, while block-level striping lets different disks service separate block requests.

Application

RAID 3 uses byte-level striping with a dedicated parity disk. In the standard RAID model, one large sequential request is spread across all data disks, so their bandwidth is combined; this is the organization optimized for the highest large-request transfer rate.

Contrast

• RAID 1 stores mirrored copies without striping; reads may be shared between mirrors, but each write is recorded on both members.

• RAID 4 uses block-level striping with one dedicated parity disk; it supports high large-read transfer, while the dedicated parity path constrains writes in the standard comparison.

• RAID 5 uses block-level striping with distributed parity; it improves independent-access balance, but parity generation and updates give it a lower large-write transfer classification than RAID 3.

Cross-check and result

IBM describes RAID 3 as designed for large-file sequential access and the classic RAID performance table gives it the highest large-I/O transfer capacity. Actual hardware performance can vary with controllers and workload, but under the standard classification named in the stem, the answer is RAID 3.