Raid 60 - Lenovo ThinkServer RD650 User Manual

12Gb/s MegaRAID SAS Software User Guide
March 2014
Table 13 RAID 50 Overview
Uses
Strong points
Weak points
Drives
Figure 13 RAID 50 Level Virtual Drive
2.2.10

RAID 60

RAID 60 provides the features of both RAID 0 and RAID 6, and includes both parity and disk striping across multiple
drive groups. RAID 6 supports two independent parity blocks per stripe. A RAID 60 virtual drive can survive the loss of
two drives in each of the RAID 6 sets without losing data. RAID 60 is best implemented on two RAID 6 drive groups
with data striped across both drive groups.
RAID 60 breaks up data into smaller blocks and then stripes the blocks of data to each RAID 6 disk set. RAID 6 breaks
up data into smaller blocks, calculates parity by performing an exclusive-or on the blocks, and then writes the blocks
of data and parity to each drive in the drive group. The size of each block is determined by the stripe size parameter,
which is set during the creation of the RAID set.
RAID 60 can support up to 8 spans and tolerate up to 16 drive failures, though less than total drive capacity is
available. Two drive failures can be tolerated in each RAID 6 level drive group.
Appropriate when used with data that requires high reliability, high request rates, high data transfer, and
medium-to-large capacity.
Provides high data throughput, data redundancy, and very good performance.
Requires two times to eight times as many parity drives as RAID 5.
8 spans of RAID 5 drive groups containing 3 to 32 drives each (limited by the maximum number of devices
supported by the controller)
LSI Corporation
- 34 -
Chapter 2: Introduction to RAID
RAID Levels