Raid 00 Drive Group Example With Two Drives - Lenovo ThinkServer RD240 Software User's Manual

RAID 00
Segment 1
Segment
9
Segment
17
...
RAID
2.5.8 RAID 10
Table 2.9 RAID 00 Overview
Weak Points
Drives
Figure 2.9

RAID 00 Drive Group Example with Two Drives

Segment Segment
2 3
Segment
10 Segment
11
Segment Segment
18 19
...
RAID
0
RAID 10 is a combination of RAID 0 and RAID 1, and 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 there are drive
failures, 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 eight spans, with a maximum of 32 drives per
RAID Levels
Does not provide fault tolerance or high bandwidth.
All data lost if any drive fails.
2 to 256
Segment Segment
4 5
Segment
13
Segment
12
Segment Segment
20 21
...
RAID
0
RAID 0
Segment Segment
6 7
Segment
Segment 15
14
Segment Segment
22 23
...
RAID
0
Segment
8
Segment
16
Segment
24
0
2-23