Raid 10 - Dell PS4000 Configuration Manual

Disk Drive
(a)
50 100
Qty / Size
(b)
7
-
(c)
8
-
(d)
14
-
16
650 1300
(e)
8 / 8
-
48
-
(a) Solid State Disk
(b) Legacy PS50E
(c) PS4000E and PS6000E only
(d) Legacy PS70E, PS100E, PS100X, PS200E, PS300E and PS400E
(e) PS60x0 XVS with 8 x 100GB SSD and 8 x 450GB SAS
Table 8: RAID 6 Total Storage Available with Hot Spares (in GB)
2.4.3

RAID 10

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.
For EqualLogic arrays using a RAID 10 policy, Table 9 shows the drive layouts that are enforced based
on the number of drives in each array and the hot spare configuration.
Disk
Drives
7
8
14
16
48
(a) Not supported. An even number of drives is required by RAID 10
(b) 48 drive arrays cannot implement a no hot-spare policy.
Table 9: RAID 10 Drive Layouts
For EqualLogic arrays using a RAID 10 policy, the total quantity of raw storage available can be
computed based on number of drives and the hot spare configuration. The Table 10 below shows the
amount of raw storage available using the hot spare drive layouts specified in Table 9 above.
Dell EqualLogic Configuration Guide v11.3
(a)
74 146 250
- - - 1000
- - - 1250
- 740 - 2500
- 1898 3250
- - - -
- - - -
Hot Spare
6 Data (3 mirrors)
1 Hot-spare
6 Data (3 mirrors)
2 Hot-spares
12 Data (6 mirrors)
2 Hot-spares
14 Data (7 mirrors)
2 Hot-spares
46 Data (23 mirrors)
2 Hot-spares
300 400 450 500
- - -
- - -
- 4000 - 5000
3900 5200 5850 6500
- - 2850
- - - 19500
No Hot Spare
(a)
N/A
8 data (4 mirrors)
14 Data (7 mirrors)
16 Data (8 mirrors)
(b)
N/A
600 750 1000
- - -
- - -
- -
7800 9750 13000
- - -
23400 - 39000
2000
-
-
-
-
-
-
-
-
-
78000
11