ASPEED AST1250 SYSTEM LEVEL TEST DRIVER DETAILS:
|File Size:||36.9 MB|
|Supported systems:||Windows 10, 8.1, 8, 7, 2008, Vista, 2003, XP|
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ASPEED AST1250 SYSTEM LEVEL TEST DRIVER
After Windmill and Watermark, the time was right another round of consolidation, bringing the rack design into ASPEED AST1250 System Level Test mix. A logical conclusion then was that this problem could not be solved within the server chassis, but could instead be solved by grouping power supplies of multiple servers.
When power demand is low, a ASPEED AST1250 System Level Test of PSUs are automatically powered off allowing the remaining PSUs to operate much closer to their optimal points in the efficiency curve. Another key improvement over regular racks was the power distribution system, which got rid of power cables and their need to be dis connected each time a server is serviced. Power is provided by three vertical power rails called a bus bar, with a rail segment for each power zone. After fitting each server with a bus bar connector, you can now simply slide in the server, the connector hot-plugs into the rail at the back, done. An additional 2 OU equipment bay was placed at the top for switching equipment.
For OpenRackv1 to work, a new server design was needed that implemented bus bar connectors at the back. Using an updated Freedom-based chassis minus the PSU would cause a fair bit of empty space.
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Simply filling the entire space with 3. The solution proved to be very similar to the power shelf, namely grouping the additional node storage outside ASPEED AST1250 System Level Test server chassis on a purpose built shelf: To replace a disk, one must simply slide out the disk sled, pop open the disk bay, swap the disk, close the bay and slide the tray back into ASPEED AST1250 System Level Test rack. These hard disks are meant to cut out the middle man and provide an object storage stack directly on the disk, in OCP speak this would mean the Knox node would not need to be connected to a compute instance but can be directly connected to the network. Another good example of modularity and lock-in free hardware design, another dollar saved.
A slightly modified version ASPEED AST1250 System Level Test Knox is used for cold storagewith specific attention being made to running the fans slowly and only spinning a disk when required. Facebook meanwhile has built another cold storage solution, this time using an OpenRack filled with 24 magazines of 36 cartridge-like containers, each of which holds 12 Blu-ray discs. Apply some ASPEED AST1250 System Level Test and you get a maximum capacity of 10, discs, and knowing you can fit up to GB on a single BD-XL disc, you have a very dense data store of up to 1. Compared to hard disks optical media touts greater reliability, with Blu-ray discs having a life expectancy of 50 years and some discs could even be able to live on for a century.
The rack resembles a jukebox; whenever a data is requested from a certain disk, a robot arm takes the cartridge to the top, where another systems slides the right discs into one of the Blu ray readers. This system serves a simple purpose: With the PSU and hard disks removed from the server, the only items left in a Freedom chassis were the motherboard, fans and one boot drive.
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One Winterfell node is 2 OU high, and consists of a modified Windmill motherboard, a bus bar connector, and a midplane connecting the motherboard to the power cabling and fans. The motherboard is equipped with a slot for a PCIe riser card — on ASPEED AST1250 System Level Test a full size x16 PCIe card and a half size x8 card can be placed — and a x8 PCIe mezzanine connector for network interfaces.
After an ORv1 deployment in ASPEED AST1250 System Level Test, it became apparent that having three power zones with three bus bars each was capable of delivering far more power than needed, so they took that information and went on to design the successor, the aptly named OpenRack v2. The placement of the power shelves relative to the bus bars was given another thought, this time they were put in the middle of a power zone because of the voltage drop in the bus bar when conducting power from the bottom to the top server. Open Rack v2, with ASPEED AST1250 System Level Test on the left. ORv2 filled with Cubby chassis on the right.
The chassis marked by the orange rectangle fit 12 nodes. Image Courtesy Facebook The change in power distribution resulted in incompatibility with Winterfell, as the bus bars for the edge nodes are now missing, and so Project Cubby saw the light of day.
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Cubby is very similar to a Supermicro TwinServer chassis, but instead of having PSUs built in, it plugs into the bus bar and wires three internal power receptacles to power each node. The Winterfell design also needed to be shortened depth-wise, so the midplane was removed.
With the amount of power zones decreased, each of the two power zones can deliver up to 6., Download.
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