Raid 0; Raid 0 Drive Group Example With Two Drives; Raid 0 Overview - Lenovo ThinkServer RD240 Software User's Manual

2.5.3

RAID 0

2-18
RAID 0 provides disk striping across all drives in the RAID drive group.
RAID 0 does not provide any data redundancy, but, along with RAID 0,
does offer the best performance of any RAID level. RAID 0 breaks up
data into smaller segments, and then stripes the data segments across
each drive in the drive group. The size of each data segment is
determined by the stripe size. RAID 0 offers high bandwidth.
Note: RAID level 0 is not fault tolerant. If a drive in a RAID 0 drive
group fails, the whole virtual drive (all drives associated
with the virtual drive) will fail.
By breaking up a large file into smaller segments, the RAID controller
can use both SAS drives and SATA drives to read or write the file faster.
RAID 0 involves no parity calculations to complicate the write operation.
This makes RAID 0 ideal for applications that require high bandwidth but
do not require fault tolerance.
Figure 2.5 provides a graphic example of a RAID 0 drive group.
Table 2.5

RAID 0 Overview

Uses
Strong Points
Weak Points
Drives
Figure 2.5

RAID 0 Drive Group Example with Two Drives

Segment 1
Segment 3
Segment 5
Segment 7
Introduction to RAID
Table 2.5 provides an overview of RAID 0.
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.
1 to 32
Segment 2
Segment 4
Segment 6
Segment 8