XEVO
Software Manual
Storage Tab
© 2022 QSAN Technology, Inc. All rights reserved.
www.qsan.com
Official
Document
24
Applications
Database,
Application
Server
Database,
Application
Server
database, File
server,
Application
server
database, File
server,
Application
server
High
Availability
solution,
Server with
large capacity
requirement
Table 5-3 RAID EE Summary
RAID 5EE
RAID 6EE
RAID 50EE
RAID 60EE
Min. # Drives
4
5
7
9
Fault
Tolerance
2 ~ 9 drive
failure
(e.g., 1 (RAID 5) +
S spares)
3 ~ 10 drive
failures
(e.g., 2 (RAID 6) +
S spares)
G+1 ~ G+8
drive failure
(e.g., 2 subgroups
(RAID 50) + S
spares)
2xG+1 ~
2xG+8 drive
failures
(e.g., 2x2 (RAID
60) + S spares)
Read
Performance
Very Good
Very Good
Very Good
Very Good
Write
Performance
Good
Fair to Good
Good
Fair to Good
Capacity
(N = drive
quantity, M =
drive capacity, G =
subgroups)
(N-1-S) x M
(e.g., (10 drives –
1 – 2 spares) x 1TB
= 7TB)
(N-2-S) x M
(e.g., (10 drives - 2
-2 spares) x 1TB =
6TB)
(N-G-S) x M
(e.g., (10 drives - 2
subgroups - 2
spares) x 1TB =
6TB)
(N-2xG-S) x M
(e.g., (10 drives - 2
x 2 subgroups - 2
spares) x 1TB =
4TB)
Capacity
Utilization
(Min.~26 drives)
18% ~ 92%
(e.g., 7/10 = 70%)
17% ~ 88%
(e.g., 6/10 = 60%)
29% ~ 88%
(e.g., 6/10 = 60%)
25% ~ 80%
(e.g., 4/10 = 40%)
Typical
Applications
Same as RAID
5
Same as RAID
6
Same as RAID
50
Same as RAID
60