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Friday, November 29, 2013

The MiniSAS Cables form factor fitted fairly well on RAID

The next part was inserting the RAID controller card into a PCI-E slot, which only took a couple of minutes. Time to tell you, I already bought a new mainboard a few weeks ago as I knew that I would need another PCI-E 8x slot. Anyway, after closing my PC again, I connected the DX800RAID with two MiniSAS Cables to the PC and with a power cable to the power supply. Before I should boot the system, I surely had to insert all eight drives, which was done in a couple of minutes as well. Finally I should boot the system.6GBit is the best-case throughput of the two mini-SAS ports. To my calculations, that is 750MB/s, but in the case of RAID6 it has to write two parity informations to the disk, which have the same size as the data written to it, so that results in a speed about 750 / 3, which is 250MB/s, which kinda is my measured performance.Adaptec 7 and 8 series controllers have moved to the new mini-SAS-HD (high-density – codename 8643) cable as opposed to the previous External MiniSAS (codename 8087) connector of the 3, 5 and 6 series controllers.