CRS RAID Deployment Recommendations
Arcserve Cyber Resilient Storage Server uses the CRS RAID configuration over other traditional RAID arrays because CRS RAID provides better data integrity, eliminates the RAID 5 write hole and offers more flexibility in storage management.
The following table describes the requirements for environments using a CRS RAID configuration.
Important! Each RAID configuration below is created by combining the usable capacity, RAW disk capacity, and number of disks. The same configuration can be created by using different combinations.
|
Usable Storage Capacity in TB (without 3.2% buffer) |
Total RAW Capacity |
RAW disk Capacity per disk* |
No. of Disks* |
Suggested CPU Cores |
Suggested RAM (in GB) |
3.2% Buffer (in GB) |
Minimum No. of Physical CPUs |
|
1.936 |
3 |
1 |
3 |
1 |
6 |
0.064 |
1 |
|
3.872 |
6 |
2 |
3 |
1 |
8 |
0.128 |
1 |
|
7.744 |
12 |
4 |
3 |
1 |
12 |
0.256 |
1 |
|
11.616 |
18 |
6 |
3 |
2 |
13 |
0.384 |
1 |
|
15.488 |
24 |
8 |
3 |
2 |
16 |
0.512 |
1 |
|
19.36 |
30 |
10 |
3 |
2 |
19 |
0.64 |
1 |
|
23.232 |
36 |
12 |
3 |
3 |
22 |
0.768 |
1 |
|
30.976 |
48 |
16 |
3 |
4 |
32 |
1.024 |
1 |
|
34.848 |
54 |
18 |
3 |
4 |
32 |
1.152 |
1 |
|
38.72 |
60 |
20 |
3 |
4 |
36 |
1.28 |
1 |
|
46.464 |
72 |
24 |
3 |
5 |
48 |
1.536 |
1 |
|
54.208 |
84 |
28 |
3 |
6 |
48 |
1.792 |
1 |
|
61.952 |
96 |
32 |
3 |
7 |
64 |
2.048 |
1 |
|
69.696 |
108 |
36 |
3 |
7 |
64 |
2.304 |
1 |
|
77.44 |
100 |
20 |
5 |
8 |
64 |
2.56 |
1 |
|
92.928 |
120 |
24 |
5 |
10 |
74 |
3.072 |
1 |
|
108.416 |
140 |
28 |
5 |
12 |
98 |
3.584 |
1 |
|
123.904 |
160 |
32 |
5 |
13 |
98 |
4.096 |
1 |
|
139.392 |
180 |
36 |
5 |
14 |
109 |
4.608 |
1 |
|
162.624 |
196 |
28 |
7 |
17 |
126 |
5.376 |
1 |
Notes:
- Before adding a disk, make sure that it does not contain any filesystems from prior use. Arcserve recommends that you use new disks or disks that have been wiped clean.
- Make sure that a default usable capacity of at least ~3.2% (min 128 MB, max 128 GB) is available for the pool reserved space. This is a portion of a storage pool's capacity that the filesystem sets aside for its own critical operations.