Raid 10 - Lenovo ThinkServer RD650 User Manual
12 gb/s megaraid sas
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12Gb/s MegaRAID SAS Software User Guide
March 2014
Table 11 RAID 00 Overview
Uses
Strong points
Weak points
Drives
Figure 11 RAID 00 Drive Group Example with Two Drives
2.2.8
RAID 10
RAID 10 is a combination of RAID 0 and RAID 1, and it consists of stripes across mirrored drives. RAID 10 breaks up data
into smaller blocks and then mirrors the blocks of data to each RAID 1 drive group. The first RAID 1 drive in each drive
group then duplicates its data to the second drive. The size of each block is determined by the stripe size parameter,
which is set during the creation of the RAID set. The RAID 1 virtual drives must have the same stripe size.
Spanning is used because one virtual drive is defined across more than one drive group. Virtual drives defined across
multiple RAID 1 level drive groups are referred to as RAID level 10, (1+0). Data is striped across drive groups to increase
performance by enabling access to multiple drive groups simultaneously.
Each spanned RAID 10 virtual drive can tolerate multiple drive failures, as long as each failure is in a separate drive
group. If drive failures occur, less than total drive capacity is available.
Configure RAID 10 by spanning two contiguous RAID 1 virtual drives, up to the maximum number of supported
devices for the controller. RAID 10 supports a maximum of 8 spans, with a maximum of 32 drives per span. You must
use an even number of drives in each RAID 10 virtual drive in the span.
The following table provides an overview of RAID 10.
Provides high data throughput, especially for large files. Any environment that does not require fault tolerance.
Provides increased data throughput for large files.
No capacity loss penalty for parity.
Does not provide fault tolerance or high bandwidth.
All data lost if any drive fails.
2 through 256
NOTE
Other factors, such as the type of controller, can restrict the number of
drives supported by RAID 10 virtual drives.
LSI Corporation
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Chapter 2: Introduction to RAID
RAID Levels
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