5U84 Primary Storage Shelf RAID controllers
The 5U84 Primary Storage Shelf uses dual, hot swappable SAS-3 RAID controllers. These controllers create and manage the 5U84 Primary Storage Shelf disk drive RAID sets that contain backed up data. They also create and manage the RAID sets on 5U84 Expansion Storage Shelves when those are attached to the 5U84 Primary Storage Shelf.
The SAS-3 RAID controllers run RAID level 6 on the storage shelf. RAID 6 offers the highest level of data protection. It allows simultaneous write operations, while also allocating two sets of parity data across the drives that comprise the RAID 6 array.
The SAS-3 RAID controllers also provides an additional SAS-3 port. The SAS-3 port enables data to flow at SAS-3 data transfer rates between the 5U84 Primary Storage Shelf and the first optional 5U84 Expansion Storage Shelf.
The following figure and table provides component details for the 5U84 Primary Storage Shelf SAS-3 RAID controller modules.
Table: 5U84 Primary Storage Shelf SAS-3 RAID Controller components
Number | Component |
|---|---|
1 | Expansion SAS port |
2 | Ethernet port Note: Cohesity does not use or support the Ethernet port. |
3 | USB port |
4 | Serial ports (Service only) |
5 | Indicator LEDs |
6 | SAS-3 RAID ports - connects to the 5372 Appliance compute nodes |
7 | Activity LEDs |
8 | Expansion SAS port Status |
