IBM DS8700, Введение и руководство по планированию

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Table 24. DS8000 RAID capacities for RAID 6 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 6 array
5 + P + Q 6 + P + Q
450 GB (FC)
DS8700
7200 FB 2074.46
(1932)
2496.45
(2325)
CKD 2072.68
(2165)
2493.91
(2605)
450 GB (SAS)
DS8800
7200 FB 2077.69
(1935)
2500.74
(2329)
CKD 2076.51
(2169)
2497.74
(2609)
600 GB (FC)
DS8700
9600 FB 2812.13
(2619)
3384.43
(3152)
CKD 2810.80
(2936)
3381.38
(3532)
600 GB (SAS)
DS8800
9600 FB 2771.32
(2581)
3336.11
(3107)
CKD 2769.63
(2893)
2736.78
(2893)
3332.56
(3481)
3293.03
(3481)
900 GB (SAS)
DS8800
14,400 FB 4159.68
(3874)
5005.78
(4662)
CKD 4156.85
(4342)
5000.28
(5223)
3 TB (SAS)
DS8800
48,000 FB 13,874.89
(12,922)
16,695.61
(15,549)
CKD 13,865.42
(14,483)
16,679.09
(17,422)
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 25. DS8000 RAID capacities for RAID 10 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)
Rank with RAID 10 array
3 + 3 4 + 4
146 GB (SAS)
DS8800
2336 FB 413.39
(385)
551.90
(514)
CKD 412.62
(431)
551.43
(576)
Chapter 4. Storage unit physical configuration
105