Release Notes

PS Series capacity
28 Dell PS Series Configuration Guide
7.3 RAID 50 drive layouts and total reported usable storage
Table 19 shows the drive layouts that are enforced when using a RAID 50 policy based on the number of
drives in each array/hot spare configuration and the total usable storage available for each model.
RAID 50 (RAID 5 sets in a striped set) is created by first creating two or more RAID 5 sets and then striping
data over those RAID 5 sets. RAID 50 implementations can tolerate a single drive failure per RAID 5 set.
RAID 50 drive layouts and total reported usable storage available with hot spares (in GB)
Disk drives
Hot spare
No hot spare
6
5 data/parity + 1 hot spare
N/A
(a)
7
6 data/parity + 1 hot spare
N/A
(a)
8
6 data/parity + 2 hot spares
8 data/parity
12
(d)
10 data/parity + 2 hot spares
12 data/parity
14
12 data/parity + 2 hot spares
14 data/parity
16
14 data/parity + 2 hot spares
16 data/parity
24
(d)
22 data/parity + 2 hot spares
24 data/parity
48
(b)
46 data/parity + 2 hot spares
N/A
(c)
a. RAID 50 requires an even number of disk drives. A 7-drive configuration without hot-spare would
result in odd number of disk drives.
b. 48 drive arrays implement stripes across multiple RAID 5 sets within a single chassis.
c. 48 drive arrays cannot implement a no hot-spare policy.
d. PS4100/PS6100 models only.
Total reported usable storage when using hot spares: All models prior to PS4100/PS6100
Drive
qty.
50
(a)
100
(a)
74
146
250
300
400
450
500
600
750
1000
2000
3000
7
(b)
-
-
-
-
888
-
-
-
-
-
-
-
-
-
8
(c)
-
-
-
-
888
-
-
-
-
-
-
-
-
-
14
(d)
-
-
660
-
2224
-
3566
-
4460
-
6695
-
-
-
16
532
1066
-
1566
2671
3207
4280
4817
5353
6427
8037
10719
21819
32972
48
-
-
-
-
-
-
-
-
18062
21677
-
36136
69260
107151
a. Solid-state disk
b. Legacy PS50E
c. PS4000E and PS6000E only
d. Legacy PS70E, PS100E, PS100X, PS200E, and PS300E
e. PS6100S (SSD) only