HP LH4r Integrated HP NetRaid Controller Configuration Guide - Page 23
Table 2-1. RAID Level Summary for RAID Levels 0 to 5, RAID Level, RAID 0, RAID 1, RAID 3, RAID 5
 |
View all HP LH4r manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 23 highlights
Chapter 2 RAID Overview Table 2-1. RAID Level Summary for RAID Levels 0 to 5 RAID Level Also Known As RAID 0 striping Fault Tolerance Redundancy Type Hot Spare Option Disks Required Usable Capacity Capacity Reduction Read Performance Random Write Performance Sequential Write Performance Typical Usage no none no one or more greatest none fast (depends on number of disks) fastest fastest Rapid reads and writes with no need for fault tolerance RAID 1 mirroring yes duplicate yes two least 50% intermediate intermediate intermediate Mostly small random writes with fault tolerance RAID 3 striping with dedicated parity yes parity RAID 5 striping with distributed parity yes parity yes yes three or more intermediate three or more intermediate capacity of one disk fast capacity of one disk fast slowest slow slow slowest Mostly large, serial transfers with fault tolerance Mostly small, random transfers with fault tolerance 17
-
1 -
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18 -
19 -
20 -
21 -
22 -
23 -
24 -
25 -
26 -
27 -
28 -
29
-
30
-
31
-
32
-
33
-
34
-
35
-
36
-
37
-
38
-
39
-
40
-
41
-
42
-
43
-
44
-
45
-
46
-
47
-
48
-
49
-
50
-
51
-
52
-
53
-
54
-
55
-
56
-
57
-
58
-
59
-
60
-
61
-
62
-
63
-
64
-
65
-
66
-
67
-
68
-
69
-
70
-
71
-
72
-
73
-
74
-
75
-
76
-
77
-
78
-
79
-
80
-
81
-
82
-
83
-
84
-
85
-
86
-
87
-
88
-
89
-
90
-
91
-
92
-
93
-
94
-
95
-
96
-
97
-
98
-
99
-
100
-
101
-
102
-
103
-
104
-
105
-
106
-
107
-
108
-
109
-
110
-
111
-
112
-
113
-
114
-
115
-
116
-
117
-
118
-
119
-
120
-
121
-
122
-
123
-
124
-
125
-
126
-
127
-
128
-
129
-
130
-
131
-
132
-
133
-
134
-
135
-
136
-
137
-
138
-
139
-
140
-
141
 |
 |
