Fujitsu ETERNUS DX60 S3 User Manual page 1063

Appendix F Basic Size and MWC Input Condition for RAID Groups
F.1 Basic Size for each RAID Group
RAID level
High
Performance
(RAID1+0)
High Capacity
(RAID5)
*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)
128KB
15D+15M 15 x Number of
concatenations
16D+16M 16 x Number of
concatenations
2D+1P 16 x Number of
concatenations
3D+1P 63 x Number of
concatenations
4D+1P 16 x Number of
concatenations
5D+1P 125 x Number of
concatenations
6D+1P 63 x Number of
concatenations
7D+1P 63 x Number of
concatenations
8D+1P 16 x Number of
concatenations
9D+1P 63 x Number of
concatenations
10D+1P 15 x Number of
concatenations
11D+1P 121 x Number of
concatenations
12D+1P 15 x Number of
concatenations
13D+1P 117 x Number of
concatenations
14D+1P 63 x Number of
concatenations
15D+1P 15 x Number of
concatenations
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ETERNUS Web GUI User's Guide (Settings)
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Basic size (MB)
(Lowest exact MB multiple) (*2)
When the Stripe Depth is ...
256KB
15 x Number of
concatenations
16 x Number of
concatenations
16 x Number of
concatenations
63 x Number of
concatenations
16 x Number of
concatenations
15 x Number of
concatenations
15 x Number of
concatenations
63 x Number of
concatenations
16 x Number of
concatenations
–
–
–
–
–
–
–
Figure F.1 shows what happens when the volume size is an integral
512KB 1024KB
15 x Number of 15 x Number of
concatenations concatenations
16 x Number of 16 x Number of
concatenations concatenations
16 x Number of –
concatenations
15 x Number of –
concatenations
16 x Number of –
concatenations
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
– –
P2X0-1270-13ENZ0