Installation guide

Software Operation Manual
18
5
Also known Block-Interleaved Distributed
Parity.
Data and parity information is subdivided
and distributed across all disk. Parity must
be the equal to the smallest disk capacity
in the array. Parity information normally
stored on a dedicated parity disk.
N+1
* Lower than
RAID 1, 10,
and 6.
* Higher than a
single drive.
Reads are
similar to RAID
0;
Writes are
slower than a
single disk.
Reads are
similar to RAID
0;
Writes are
slower than a
single disk.
6
RAID 6 provides highest reliability, but not
widely used. Similar to RAID 5, but does
two different parity computations or the
same computation on overlapping
subsets of the data. The RAID 6 can offer
fault tolerance greater that RAID 1 or
RAID 5 but only consumes the
capacity of
2 disk drives for distributed parity data.
N+2
* Highest
reliability
Reads are
similar to RAID
0;
Writes are
slower than
RAID 5.
Reads are
similar to RAID
0;
Writes are
slower than
RAID 5.
30
RAID 30 is a combination multiple
RAID 3 volume sets with RAID 0
(striping)
(N+1)
*2
Up to one disk
failure in each
sub-volume
50
RAID 50 is a combination multiple
RAID 5 volume sets with RAID 0
(striping)
(N+1)
*2
Up to one disk
failure in each
sub-volume
60
RAID 60 is a combination multiple
RAID 6 volume sets with RAID 0
(striping)
(N+2)
*2
Up to two disk
failure in each
sub-volume