|
Degraded RAID performance and rebuild time.
PRO RX, RXqp, RXd, FC, IDC, FCa:
RAID 5 summary: 9% performance impact with a drive down, 12% during rebuild. 20 hours rebuild time.
|
RAID 5 |
Default 5% rebuild priority |
80% rebuild priority* |
|
|
Performance affected |
Rate |
Time for 16TB |
Performance
affected |
Rate |
Time for 16TB |
|
1 drive down |
9% |
|
9% |
|
|
Rebuild |
12% |
730GB per hour |
20H 35M |
63% |
1780GB per hour |
8H 23M |
|
RAID 6 summary: 5 to 12% performance impact with drive(s) down, 9% to 16% during rebuild. 20 hours rebuild time.
|
RAID 6 |
Default 5% rebuild priority |
80% rebuild priority* |
|
|
Performance affected |
Rate |
Time for 16TB |
Performance
affected |
Rate |
Time for 16TB |
|
1 drive down |
5% |
|
5% |
|
|
2 drives down |
12% |
12% |
|
1 drive rebuild |
9% |
680GB per hour |
20H 22M |
70% |
1640GB per hour |
8H 28M |
|
2 drives rebuild |
16% |
620GB per hour |
22H 33M |
71% |
1570GB per hour |
8H 53M |
|
Measured with PRO RX with sixteen 1TB drives.
PRO DQ, DQg2:
RAID 5 summary: 10% performance impact with a drive down, 15% during Rebuild. 7 hours rebuild time.
|
RAID 5 |
Default 5% rebuild priority |
80% rebuild priority* |
|
|
Performance affected |
Rate |
Time for 4TB |
Performance
affected |
Rate |
Time for 4TB |
|
1 drive down |
10% |
not applicable |
|
Rebuild |
15% |
480GB per hour |
7H 18M |
63% |
1210GB per hour |
2H 53M |
|
RAID 6 summary: 12 to 18% performance impact with drive(s) down, 20% during rebuild. 7 to 8 hours rebuild time.
|
RAID 6 |
Default 5% rebuild priority |
80% rebuild priority* |
|
|
Performance affected |
Rate |
Time for 4TB |
Performance
affected |
Rate |
Time for 4TB |
|
1 drive down |
12% |
|
|
2 drives down |
18% |
|
1 drive rebuild |
20% |
400GB per hour |
7H 25M |
66% |
1020GB per hour |
2H 56M |
|
2 drives rebuild |
20% |
370GB per hour |
7H 58M |
60% |
830GB per hour |
3H 37M |
|
Measured with PRO DQ with eight 500GB drives.
Performance affected are Reads based on average of entire RAID from empty to full. Write performance not significantly affected. Rate is calculated based on useable capacity. Performance and Rate might vary with other capacity disk drives.
* Rebuild priority can be set via RAID Console > Systems Controls > System Config > Background Task Priority.
|
