5U84 Primary Storage Shelf RAID controllers
The 5U84 Primary Storage Shelf uses dual, hot swappable Fibre Channel 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 Fibre Channel RAID controllers run RAID levels 6 and 10 on the storage shelf. RAID 10 is also referred to as RAID 1+0. 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.
RAID 10 uses mirroring and striping technology without the use of parity. It enables the creation of large high performance disk groups for data storage purposes, while also providing the fault tolerance protection that mirroring offers. RAID 10 is used to protect the metadata that is stored on the storage shelves.
The Fibre Channel RAID controllers also provide one 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 Fibre Channel RAID controller modules.
The following figure and table provides component details for the 5U84 Primary Storage Shelf Fibre Channel RAID controller modules.
Table: 5U84 Primary Storage Shelf Fibre Channel RAID controller components
Number | Component |
|---|---|
1 | SAS-3 expansion port |
2 | Ethernet port Note: Veritas does not use or support the Ethernet port. |
3 | USB port |
4 | Serial ports (Service only) |
5 | Indicator LEDs |
6 | 16Gb Fibre Channel ports |
7 | Activity LED |
8 | Activity LEDs |
The following figure and table provides RAID controller indicator LED details for the 5U84 Primary Storage Shelf Fibre Channel RAID controller modules.
Table: 5U84 Primary Storage Shelf Fibre Channel RAID Controller indicator LED descriptions and definitions
LED | Description | Definition |
|---|---|---|
1 | Host 4/8/16Gb Fibre Channel 1 Link Status / Link Activity | Off - No link detected. Green- The port is connected and the link is up. Blinking green - The link has I/O activity. |
2 | Link Status / Link Activity | Off - No link detected. Green- The port is connected and the link is up. Blinking green - The link has I/O activity or replication activity. |
3 | OK | Off - A controller issue has been detected, or the controller is turned off. Blinking green - The system is starting. Green - The controller is operating normally. |
4 | Fault | Off - The controller is operating normally. Amber - A controller fault has been detected or a service action is required. Blinking amber - Hardware-controller power on error, or a cache flush or restore error. |
5 | OK to Remove | Off - The controller is not prepared for removal. Blue - The controller is prepared for removal. |
6 | Identify | White - The controller is being identified. |
7 | Cache Status 2 | Off - In a working controller, the cache is clean (contains no unwritten data). This is an occasional condition that occurs while the system is booting. Green - The cache is dirty (contains unwritten data) and the operation is normal. The unwritten information can be the log data or the debug data that remains in the cache. By itself, a Green cache status LED does not indicate that any user data is at risk or that any action is necessary. Blinking Green - A Compact Flash flush or a cache self-refresh is in progress, indicating cache activity. |
8 | Network Port Link Activity Status 3 | Off - The Ethernet link is not established, or the link is down. Green - The Ethernet link is up (applies to all negotiated link speeds). |
9 | Network Port Link Speed 3 | Off - The link is up at 10/100base-T negotiated speeds. Amber - The link is up and negotiated at 1000base-T speed. |
10 | SAS-3 Expansion Port Status | Off - The port is empty or the link is down. Green - The port is connected and the link is up. |
1 When in Fibre Channel mode, the SFPs must be qualified 8Gb or 16Gb fiber optic option. A 16Gb/s SFP can run at 16Gb/s, 8Gb/s, or 4Gb/s, or auto-negotiate its link speed. An 8Gb/s SFP can run at 8Gb/s, 4Gb/s, or auto-negotiate it link speed. 2 Cache Status LED support power on behavior and operational (cache status) behavior. 3 When the port is down, both LEDs are off. | ||