IBM DS8700, Introduction And Planning Manual

Page: 126 / 256

Table 23. DS8000 RAID capacities for RAID 5 arrays (continued)
Disk size and
Storage Unit Total physical
capacity (GB) per
disk drive set Fixed block (FB)
or count key
data (CKD) Effective capacity in GB
(Number of Extents)
(See Notes 1 and 2)
Rank with RAID 5 array
6 + P 7 + P
450 GB (SAS)
DS8800
7200 FB 2553.35
(2378)
2977.48
(2773)
CKD 2550.40
(2664)
2973.55
(3106)
600 GB (FC
and SSD)
DS8700
9600 FB 3456.37
(3219)
2545.61
(2659)
CKD 3451.27
(3605)
4024.73
(4204)
600 GB (SAS)
DS8800
9600 FB 3406.98
(3173)
3970.69
(3698)
CKD 3401.49
(3553)
3966.33
(4143)
900 GB (SAS)
DS8800
14,400 FB 5112.08
(4761)
5958.19
(5549)
CKD 5104.63
(5332)
5951.90
(6217)
Notes:
1.
Physical capacities are in decimal gigabytes (GB). One decimal GB is 1,000,000,000
bytes.
2. Disk drive sets contain either 8 or 16 drives. An array site contains 8 drives. The
effective capacities shown are for a single array, which resides in one array site.
Table 24. DS8000 RAID capacities for RAID 6 arrays
Disk size and
Storage Unit
Total physical
capacity (GB) per
disk drive set
Fixed block (FB)
or count key
data (CKD)
Effective capacity in GB
(Number of Extents)
(See Notes 1 and 2)
Rank with RAID 6 array
5 + P + Q 6 + P + Q
146 GB (SAS)
DS8800
2336 FB 674.31
(628)
811.75
(756)
CKD 673.98
(704)
810.88
(847)
300 GB (FC)
DS8700
4800 FB 1381.90
(1287)
1663.22
(1549)
CKD 1380.51
(1442)
1661.01
(1735)
400 GB (SSD)
DS8800
6400 FB 1881.19
(1752)
2264.52
(2109)
CKD 1880.25
(1964)
2261.28
(2362)
104
Introduction and Planning Guide