HP MR Gen10 Plus User Manual

Backed-out writesBacked-out writes
After parity initialization is complete, random writes to a RAID 5, 50, 6, or 60 can use a faster backed-out write operation. A backed-out
write uses the existing parity to calculate the new parity data. As a result, the write penalty for RAID 5 and RAID 50 is always four drive
operations, and the write penalty for a RAID 6 and RAID 60 is always six drive operations. As you can see, the write penalty is not
influenced by the number of drives in the array.
Backed-out writes is also known as "read-modify-write."
This method has the benefit of faster RAID, 5, 50, 6, or 60 random writes.
Backed-out writes 43

HP MR Gen10 Plus Specifications

General

Device Type	RAID Controller
Interface	PCIe 3.0 x8
RAID Support	Yes
Category	Controller
RAID Levels	0, 1, 5, 6, 10, 50, 60
Memory	2GB Flash-backed cache
Storage	SAS/SATA
Power Supply	Not Applicable