Fujitsu ETERNUS DX60 S3 User Manual page 1060

Appendix F Basic Size and MWC Input Condition for RAID Groups
F.1 Basic Size for each RAID Group
RAID level
Reliability
(RAID5+0)
High Reliability
(RAID6)
*1: D: Data drives, M: Mirror drives, P: Parity drives
*2: Basic size when creating volumes.
The ETERNUS DX manages volumes in units of stripe size. If the volume size is not an exact multiple of the basic size
(stripe size), then when a RAID group is created the remainder at the end of the last stripe used will be lost. Stripe
size is independent of the disk drive capacity.
multiple of the basic size and what happens when it is not.
Drive configuration (*1)
(2D+1P)x2
(3D+1P)x2
(4D+1P)x2
(5D+1P)x2
(6D+1P)x2
(7D+1P)x2
(8D+1P)x2
(9D+1P)x2
(10D+1P)x2
(11D+1P)x2
(12D+1P)x2
(13D+1P)x2
(14D+1P)x2
(15D+1P)x2
3D+2P
4D+2P
5D+2P
6D+2P
7D+2P
8D+2P
9D+2P
10D+2P
11D+2P
12D+2P
13D+2P
14D+2P
Figure F.1
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ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
Basic size (MB) (Lowest exact MB multiple) (*2)
(Stripe Depth = 64KB (default))
2 x Number of concatenations
15 x Number of concatenations
2 x Number of concatenations
15 x Number of concatenations
3 x Number of concatenations
7 x Number of concatenations
2 x Number of concatenations
9 x Number of concatenations
5 x Number of concatenations
11 x Number of concatenations
3 x Number of concatenations
13 x Number of concatenations
7 x Number of concatenations
15 x Number of concatenations
15 x Number of concatenations
2 x Number of concatenations
15 x Number of concatenations
15 x Number of concatenations
7 x Number of concatenations
2 x Number of concatenations
27 x Number of concatenations
15 x Number of concatenations
11 x Number of concatenations
3 x Number of concatenations
13 x Number of concatenations
7 x Number of concatenations
shows what happens when the volume size is an integral
P2X0-1270-13ENZ0