Disk Drive Set Capacity (Raid 10 Arrays); Disk Drive Set Capacity (Raid 5 Arrays) - IBM TotalStorage DS6000 Introduction And Planning Manual
Hide thumbs
Also See for TotalStorage DS6000:
- Redbook (578 pages) ,
- Redbooks (406 pages) ,
- Attachment manual (298 pages)
Table of Contents
Advertisement
Table 7 and Table 8 lists the effective capacity of a DS6800 disk drive sets.
34
Introduction and Planning Guide
Table 7. Disk drive set capacity (RAID 10 arrays)
Disk
Total
size
physical
(GB)
capacity
(See
per (GB)
Note 2)
disk drive
set
(See
Note 3)
73
292
146
584
300
1200
Note:
1. All values for capacity and extent numbers are based on preliminary data.
2. Physical capacities are in decimal gigabytes (GB). One GB is one billion bytes.
3. Although disk drive sets contain 4 drives, arrays use either 4 or 8 drives.
4. The array consists of 1 data drive that is mirrored to 1 copy drive. Two other drives in
the disk drive set are used as spares.
5. The array consists of 2 data drives that are mirrored to 2 copy drives.
6. The array consists of 3 data drives that are mirrored to 3 copy drives. Two other drives
in the disk drive set are used as spares.
7. The array consists of 4 data drives that are mirrored to 4 copy drives.
Table 8. Disk drive set capacity (RAID 5 arrays)
Disk
Total
size
physical
(GB)
capacity
(See
(GB) per
Note 2)
disk drive
set
(See
Note 3)
73
292
146
584
Fixed
Effective capacity in GB
block
(FB) or
count key
data (CKD)
1 × 2
(See
Note 4)
FB
67.57
(62)
CKD
64.33
(68)
FB
136.37
(127)
CKD
134.33
(142)
FB
281.32
(262)
CKD
275.293
(291)
Fixed
block
(FB) or
Ranks of RAID 5 arrays (See Note 4)
count key
data
2 + P
(CKD)
(See
Note 5)
FB
136.06
(127)
CKD
135.28
(143)
FB
275.32
(256)
CKD
271.50
(287)
(Number of Extents)
Ranks of RAID 10 arrays
2 × 2
3 × 3
(See
(See
Note 5)
Note 6)
136.06
204.01
(127)
(190)
135.28
201.50
(143)
(213)
275.32
414.46
(256)
(386)
271.50
408.67
(287)
(432)
561.27
845.03
(523)
(787)
555.31
832.48
(587)
(880)
Effective capacity in G
(Number of Extents)
3 + P
6 + P
(See
(See
Note 6)
Note 7)
204.01
410.17
(190)
(382)
201.50
404.89
(213)
(428)
410.46
830.00
(386)
(773)
408.67
820.19
(432)
(867)
4 × 4
(See
Note 7)
272.73
(254)
268.67
(284)
552.98
(515)
545.85
(577)
1125.28
(1050)
1110.61
(1174)
7 + P
(See
Note 8)
477.82
(445)
473.00
(500)
968.52
(902)
956.41
(1011)
Advertisement
Table of Contents
