IBM System storage DS6000 Series, Redbooks

Page: 164 / 406

140
DS6000 Series: Concepts and Architecture
The following figures are for an 8 DDMs array. The user can also select a 4 DDMs array
configuration.
Figure 8-8 CKD RAID rank capacity (8 DDMs array)
Note: IBM plans to offer
Capacity Magic
for DS6000 in the future. Capacity Magic
calculates the physical and effective storage capacity of a DS6000. IBM sales
representatives and IBM Business Partners can download this tool from the IBM Web site.
The values presented here are intended to be used only until Capacity Magic is available.
CKD RAID rank capacity
Notes
There may be space left over when defining the devices shown in the table.
Devices that are not a multiple of 1113 cylinders will use additional space on the disk
subsystem as the allocation unit is an extent of this size.
RAID type
RAID
type DDM
capacity Array
Format
Extents
Binary
GB Decimal
GB 3390-3
devices 3390-9
devices 32760 cyl
devices 65520 cyl
devices
RAID10 73GB RAID10 73GB 3+3+2S 213 187.66 201.50 71 23 7 3
RAID10 73GB RAID10 73GB 4+4 284 250.21 268.67 94 31 9 4
RAID10 146GB RAID10 146GB 3+3+2S 432 380.61 408.67 144 48 14 7
RAID10 146GB RAID10 146GB 4+4 577 508.36 545.85 192 64 19 9
RAID10 300GB RAID10 300GB 3+3+2S 880 775.31 832.48 293 97 29 14
RAID10 300GB RAID10 300GB 4+4 1,174 1,034.34 1,110.61 391 130 39 19
RAID5 73GB RAID5 73GB 6+P+S
428 377.08 404.89 142 47 14 7
RAID5 73GB RAID5 73GB 7+P 500 440.52 473.00 166 55 16 8
RAID5 146GB RAID5 146GB 6+P+S 773 681.04 731.26 257 85 25 13
RAID5 146GB RAID5 146GB 7+P
1,011 890.73 956.41 337 112 33 17
RAID5 300GB RAID5 300GB 6+P+S 1,765 1,555.03 1,669.70 588 196 58 29
RAID5 300GB RAID5 300GB 7+P 2,059 1,814.05 1,947.83 686 228 68 34