Example Of Distributed Parity Across Two Blocks In A Stripe (Raid 6); Raid 00 Overview - Lenovo ThinkServer RD240 Software User's Manual

Segment 1 Segment 2
Segment 6 Segment 7
Segment 11
Segment 12
Segment 16 Parity (P13-P16)
Parity (P17-P20)
Parity (Q17-Q20)
Note: Parity is distributed across all drives in the drive group.
2.5.7 RAID 00
2-22
Figure 2.8 Example of Distributed Parity across Two Blocks in a
Stripe (RAID 6)
Segment 3
Segment 8
Parity (P9-P12)
Parity (Q13-Q16)
Segment 17
A RAID 00 drive group is a spanned drive group that creates a striped
set from a series of RAID 0 drive groups. RAID 00 does not provide any
data redundancy, but, along with RAID 0, does offer the best
performance of any RAID level. RAID 00 breaks up data into smaller
segments and then stripes the data segments across each drive in the
drive groups. The size of each data segment is determined by the stripe
size. RAID 00 offers high bandwidth.
Note: RAID level 00 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 00 involves no parity calculations to complicate the write operation.
This makes RAID 00 ideal for applications that require high bandwidth
but do not require fault tolerance.
RAID 00. Figure 2.6
group.
Table 2.9

RAID 00 Overview

Uses
Strong Points
Introduction to RAID
Segment 4
Parity (P5-P8)
Parity (Q9–Q12)
Segment 13
Segment 18
Table 2.6
provides a graphic example of a RAID 00 drive
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.
Parity (P1-P4) Parity (Q1-Q4)
Parity (Q5-Q8) Segment 5
Segment 10
Segment 9
Segment 14 Segment 15
Segment 19 Segment 20
provides an overview of