1-14 Disk Array Unit Overview
Arbitrary Logical Disk Capacity
An arbitrary logical disk capacity can be bound by using the management software. To
bind logical disks, enter the capacity in MBs (M=1024^2).
For management software, the logical disk capacity can be specified with an integer
multiple of the basic capacity, or the least common multiple of (stripe size) × (number
of data disks) and 1024 (400h).
Ex: Capacity secured in RAID-5 (6+P)
Stripe size (100h) × number of data disks (6h) = 600h (768 KB)
The basic capacity is the least common multiple of 400h and 600h.
The capacity must be an integer multiple of C00h (1536 KB).
Maximum Logical Disk Capacity
The maximum capacity per logical disk is shown in the table below (including the
system capacity of 2 MB).
Enter the value resulting from subtracting the system capacity (2 MB) from the capacity
in Table 1-6 as the LD capacity.
Table 1-6. Maximum Logical Disk Capacity (MB) M=1024^2
RAID Type Number of PDs 36GB 73GB 1476GB
Single unit 34087 68284 136325
RAID0 (1) 1 34087 68284 136325
RAID0 (3) 3 102261 204852 408975
RAID0 (5) 5 170435 341420 681625
RAID0 (10) 10 340870 682840 1363251
RAID0 (15) 15 511305 1024260 2044876
RAID1 (1+1) 2 34087 68284 136325
RAID5 (2+P) 3 68174 136568 272650
RAID5 (3+P) 4 102261 204852 408975
RAID5 (4+P) 5 136348 273137 545300
RAID5 (5+P) 6 170435 341420 681625
RAID5 (6+P) 7 204522 409704 817950
RAID5 (7+P) 8 238609 477988 954275
RAID5 (8+P) 9 272697 546274 1090600
RAID5 (9+P) 10 306783 614556 1226926
RAID5 (10+P) 11 340870 682840 1363251
RAID5 (11+P) 12 374957 751124 1499576
RAID5 (12+P) 13 409044 819411 1635901
RAID5 (13+P) 14 443131 887692 1772226
RAID5 (14+P) 15 477218 955976 1908551
RAID10 (2+2) 4 68174 136568 272650
RAID10 (3+3) 6 102261 204852 408975
RAID10 (4+4) 8 136348 273137 545300
RAID10 (5+5) 10 170435 341420 681625
RAID10 (6+6) 12 204522 409704 817950
RAID10 (7+7) 14 238609 477988 954275
Note:The capacities in the table above include the system capacity (in T&D area) of 2 MB.
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