Raid 10 Drive Layouts And Total Reported Usable Storage - Dell EqualLogic PS6100 series Configuration Manual

4.2

RAID 10 drive layouts and total reported usable storage

Using a RAID 10 policy, Table 12 shows the drive layouts that are enforced based on the number of
drives in each array/hot spare configuration, and the total usable storage available for each model.
RAID 10 (mirrored sets in a striped set) combines two high performance RAID types: RAID 0 and RAID
1. A RAID 10 is created by first building a series of two disk RAID 1 mirrored sets, and then distributing
data over those mirrors. RAID 10 implementations can tolerate one drive failure per mirror pair.
Table 12 RAID 10 drive layouts and total reported usable storage available with hot spares (in GB)
Disk drives Hot spare
6 4 Data (2 mirrors) + 2 Hot-spares
7
6 Data (3 mirrors) + 1 Hot-spare
8 6 Data (3 mirrors) + 2 Hot-spares
(c)
12
10 Data (5 mirrors) + 2 Hot-spares
14 12 Data (6 mirrors) + 2 Hot-spares
16 14 Data (7 mirrors) + 2 Hot-spares
(c)
24
22 Data (11 mirrors) + 2 Hot-spares
48 46 Data (23 mirrors) + 2 Hot-spares
(a) Not supported. An even number of drives is required by RAID 10
(b) 48 drive arrays cannot implement a no hot-spare policy.
(c) PS4100/PS6100 models only
Total reported usable storage when using hot spares: All models prior to PS4100/PS6100
Disk
drive
(a) (a)
50 100
qty /
Size
(b)
7
- -
(c)
8
- -
(d)
14
- -
16
309 621
48
- -
Total reported usable storage when using hot spares: PS41x0/PS61x0
Disk
drive
146 200
qty /
Size
6
-
12
650 920
14
781
24
1433 2027
(a) Solid State Disk
(b) Legacy PS50E
(c) PS4000E and PS6000E only
(d) Legacy PS70E,PS100E, PS100X, PS200E and PS300E
(e) PS6100S (SSD) only
March 2013
74 146 250 300
- - 666 -
- - 666 -
395 - 1333 -
- 913 1556 1867
- - - -
(e) (e)
300 400
- - -
1331 1843
- 1599 -
2938 4065
Dell EqualLogic Configuration Guide v14.1
No hot spare
6 Data (3 mirrors) + 0 Hot-spare
(a)
N/A
8 data (4 mirrors)
12 data (7 mirrors)
14 data (7 mirrors)
16 data (8 mirrors)
24 data (12 mirrors)
(b)
N/A
400 450 500 600
- - - -
- - - -
2135 - 2671 -
2492 2805 3117 3744
- - 10647 12779
500 600 900
887 1064 -
2222 2672 4014
2670 3207 4816
4904 5888 8841
750 1000 2000 3000
- - - -
- - - -
4013 - - -
4683 6247 12749 19230
- 21306 40840 63191
1000 2000 3000
1781 3635 5498
4454 9103 13762
5353 - -
9820 19998 30221
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