Write penalty

RAID Write Penalty
Write penalties for common RAID levels are as follows:
RAID 0 (stripe): Data is written to physical disks once. The RAID 0 write penalty value is 1.
RAID 1 (mirror) and RAID 10: The write penalty of RAID 1 and RAID 10 is 2, because data mirroring results in two data write operations in each data write.
RAID 5: Because the parity bit calculation mechanism exists in RAID 5, data reading, parity bit reading, data writing, and parity bit writing are performed. Therefore, the write penalty value of RAID 5 is 4.
RAID 6: RAID 6 has two parity bits. The parity bits need to be read and written twice. Therefore, the write penalty value of RAID 6 is 6.

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