raid1+0 and raid0+1
Some suspect about the crash probability of raid0＋1 and raid1＋0 .
............... N
............... N[@more@]Some suspect about the crash probability of raid0＋1 and raid1＋0 .
............... N
............... N
0＋1 crash probability :
all = 2n*(2n-1)/2
bad = n*n
crash rate = n*n/ (2n*n -n) = n/(2n-1) --> n/2*(n-1)
4 4/6
8 8/14
16 16/30
32 32/62
crash limit -> 50%
............... N
............... N
1＋0 crash probability :
all = 2n*(2n-1)/2
bad = n
crash rate =n/ (2n*n -n) = 1/(2n-1) --> 1/(n-1)
4 1/3
8 1/7
16 1/15
32 1/31
crash limit -> 0% ?
............... N
............... N[@more@]Some suspect about the crash probability of raid0＋1 and raid1＋0 .
............... N
............... N
0＋1 crash probability :
all = 2n*(2n-1)/2
bad = n*n
crash rate = n*n/ (2n*n -n) = n/(2n-1) --> n/2*(n-1)
4 4/6
8 8/14
16 16/30
32 32/62
crash limit -> 50%
............... N
............... N
1＋0 crash probability :
all = 2n*(2n-1)/2
bad = n
crash rate =n/ (2n*n -n) = 1/(2n-1) --> 1/(n-1)
4 1/3
8 1/7
16 1/15
32 1/31
crash limit -> 0% ?
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