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Chapter 5 Configuration Menu
> 5.2 RAID Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
148
Copyright 2010 FUJITSU LIMITED
P2X0-0760-02ENZ0
Depending on the RAID level, restrictions of disk layout vary.
Check the following and select the disks.
Restrictions of disk layout
*1: The FC-Loop number is represented as the lower 5 bits of the DE-ID (DE#xx) . D i s k d r i v e s i n
the same FC-Loop mean the disk drives installed in the DEs whose FC-Loop numbers are the
same.
The same FC-Loop: DE#0x, DE#2x, DE#4x, DE#6x
DE#1x, DE#3x, DE#5x, DE#7x
(Example) DE#00, DE#20, DE#40, and DE#60 are DEs in the same FC-Loop.
(Example) DE#11, DE#31, DE#51, and DE#71 are DEs in the same FC-Loop.
RAID Level Number of disks Selection Conditions
RAID0 2 to 16 -
RAID1 RAID1(1+1) 2 Mirroring should NOT be by disk
drives in the same FC-Loop (*1).
RAID1+0 RAID1+0(2+2) to
RAID1+0(16+16)
Even numbers
from 4 to 32
Mirroring should NOT be by disk
drives in the same FC-Loop (*1).
RAID5
(ETERNUS
DX410/DX440)
RAID5(2+1) to
RAID5(15+1)
3 to 16 -
RAID5
(ETERNUS
DX8100)
RAID5(3+1) or
RAID5(7+1)
4 or 8 -
RAID5
(ETERNUS
DX8400/DX8700)
RAID5(3+1) 4
• Disk drives containing RAID5
should not be used in the
same FC-Loop (*1).
• Configure RAID5 using disk
drives in the pair BRT (Back-
end Router). (*2)
RAID5(7+1) 8 Disk drives containing RAID5
should not be used in the same
FC-Loop (*1).
RAID6
(ETERNUS
DX410/DX440)
RAID6(3+2) to
RAID6(14+2)
5 to 16 -
RAID6
(ETERNUS
DX8100)
RAID6(6+2) or
RAID6(14+2)
8 or 16 -
RAID6
(ETERNUS
DX8400/DX8700)
RAID6(6+2) or
RAID6(14+2)
8 or 16 Each FC-Loop should contain
no more than three disk drives
from any given RAID6 group
(*1).