RAID-Z parity cost
 Share
The version of the browser you are using is no longer supported. Please upgrade to a supported browser.Dismiss

 
View only
 
 
Still loading...
ABCDEFGHIJKLMNOPQRSTUVWXYZ
1
This table shows the space used by RAIDZ1 parity + padding for varying number of disks in the RAIDZ1 group, for blocks of various sizes (in sectors, after compression).
2
The value (parity + padding cost) is shown as a percent of the total storage size. For example, with 7 disks in each RAIDZ1 group, a 16-sector block (8KB or 64KB) uses 20% of total space (4 sectors) for parity + padding.
3
134567891011121314151617
<--- number disks in RAIDZ1 group
4
150%50%50%50%50%50%50%50%50%50%50%50%50%50%50%
5
250%50%50%50%50%50%50%50%50%50%50%50%50%50%50%
6
350%25%25%25%25%25%25%25%25%25%25%25%25%25%25%
7
433%33%33%33%33%33%33%33%33%33%33%33%33%33%33%
8
538%38%38%17%17%17%17%17%17%17%17%17%17%17%17%
9
640%25%25%25%25%25%25%25%25%25%25%25%25%25%25%
10
742%30%30%30%30%13%13%13%13%13%13%13%13%13%13%
11
833%33%20%20%20%20%20%20%20%20%20%20%20%20%20%
12
936%25%25%25%25%25%25%10%10%10%10%10%10%10%10%
13
1038%29%29%17%17%17%17%17%17%17%17%17%17%17%17%
14
1139%31%21%21%21%21%21%21%21%8%8%8%8%8%8%
15
1233%25%25%25%14%14%14%14%14%14%14%14%14%14%14%
16
1335%28%28%19%19%19%19%19%19%19%19%7%7%7%7%
17
1436%30%22%22%22%13%13%13%13%13%13%13%13%13%13%
18
1538%25%25%17%17%17%17%17%17%17%17%17%17%6%6%
19
1633%27%20%20%20%20%11%11%11%11%11%11%11%11%11%
20
2033%29%23%17%17%17%17%17%9%9%9%9%9%9%9%
21
2433%25%20%20%14%14%14%14%14%14%8%8%8%8%8%
22
2833%26%22%18%18%13%13%13%13%13%13%13%7%7%7%
23
3233%27%20%20%16%16%11%11%11%11%11%11%11%11%6%
24
6433%26%20%18%16%14%11%11%11%9%9%9%9%9%6%
25
12833%26%20%17%15%14%11%11%10%9%9%7%7%7%6%
26
25633%25%20%17%15%13%11%10%9%9%8%7%7%7%6%
27
^ block size in sectors
28
29
150%50%50%50%50%50%50%50%50%50%50%50%50%50%50%
30
250%50%50%50%50%50%50%50%50%50%50%50%50%50%50%
31
433%33%33%33%33%33%33%33%33%33%33%33%33%33%33%
32
833%33%20%20%20%20%20%20%20%20%20%20%20%20%20%
33
1633%27%20%20%20%20%11%11%11%11%11%11%11%11%11%
34
3233%27%20%20%16%16%11%11%11%11%11%11%11%11%6%
35
6433%26%20%18%16%14%11%11%11%9%9%9%9%9%6%
36
12833%26%20%17%15%14%11%11%10%9%9%7%7%7%6%
37
25633%25%20%17%15%13%11%10%9%9%8%7%7%7%6%
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
Loading...
 
 
 
RAIDZ1 parity cost, percent of total storage
RAIDZ2 parity cost, percent of total storage
RAIDZ3 parity cost, percent of total storage
RAIDZ1 parity cost
RAIDZ2 parity cost
RAIDZ3 parity cost