IBM DS8880 Series Introduction And Planning Manual page 107

Table 39. RAID capacities for High Performance Flash Enclosures Gen2 (continued)
Physical
capacity of
Flash Tier
Flash Tier 0, 0, Flash
Flash Tier 1, or Tier 1, or
Flash Tier 2 Flash Tier
drives disk size 2 drives set Rank type
3.2 TB 51.2 TB FB Lg Ext
FB Sm Ext
CKD Lg Ext
CKD Sm Ext
3.8 TB 61.4 TB FB Lg Ext
FB Sm Ext
CKD Lg Ext
CKD Sm Ext
7.6 TB 123 TB FB Lg Ext
FB Sm Ext
CKD Lg Ext
CKD Sm Ext
RAID 5 array capacities for standard drive enclosures
The following table lists the RAID 5 array capacities for fully populated standard
storage enclosures. RAID 5 is not supported for drives larger than 1 TB and
requires a request for price quote (RPQ). For information, contact your sales
representative.
Table 40. RAID capacities for RAID 5 arrays
Drive size and
type
300 GB disk
drives
400 2.5-in. GB
flash drives
(SSD)
600 GB disk
drives
800 GB 2.5-in
flash drive
(SSD)
Effective capacity of one rank in number of extents
RAID-10 arrays
3 + 3 4 + 4 6 + P
8637 11527 n/a
552771 737753 n/a
9687 12928 n/a
513414 685225 n/a
10371 13839 n/a
663766 885747 n/a
11632 15522 n/a
616506 822682 n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
n/a n/a n/a
Total physical Fixed block
capacity (GB) (FB) or count
1, 2
per drive set key data (CKD)
4,800 FB
CKD
6,400 FB
CKD
9,600 FB
CKD
12,800 FB
CKD
Chapter 4. Storage system physical configuration
RAID-5 arrays
7 + P 5 + P + Q
n/a 14417
n/a 922733
n/a 16170
n/a 857029
n/a 17308
n/a 1107725
n/a 19412
n/a 1028848
n/a 34650
n/a 2217663
n/a 38863
n/a 2059760
Effective capacity in GB
(number of extents)
Rank with RAID 5 array
6 + P
1,664.30
(1,550)
1,644.16
(1,738)
2,289.22
(2,132)
2,261.90
(2,391)
3,383.73
(3,156)
3,348.86
(3,540)
4,617.09
(4,300)
4,561.64
(4,822)
RAID-6 arrays
6 + P + Q
17307
1107703
19412
1028843
20776
1329703
23302
1235028
41587
2661631
46643
2472118
2, 3
7 + P
1,947.77
(1,814)
1,924.18
(2,034)
2,676.84
(2,493)
2,645.03
(2,796)
3,959.96
(3,688)
3,912.68
(4,136)
5,392.33
(5,022)
5,328.85
(5,633)
95