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Storage OCZ bypass SATA for SSD's

Discussion in 'Hardware' started by l3v1ck, 30 Sep 2010.

  1. l3v1ck

    l3v1ck Fueling the world, one oil well at a time.

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    What's the point? They might just as well build the SSD's straight on to PCIe cards.
     
  2. Phalanx

    Phalanx Needs more dragons and stuff.

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    Because it is cheaper to have a single controller controlling multiple SSDs.
     
  3. Guest-16

    Guest-16 Guest

    It's an extensible interface which is great for servers which have more slots for hard drives than they have PCI slot space. This is not a consumer solution.

    Basically they are just pulling the PCI-Express signal from the slot and pushing it over the wiring, where each SSD has a PCI-E to SATA RAID chip that address' two Sandforce controllers. It's clever and simple to use off the shelf parts but building their own IC would reduce latency and remove some cost of the chips used. and frankly Lightpeek would be better suited to it as well since they are limited to very high quality cabling only.

    Ideally the design should be:

    Code:
    
                                                                                                  -----> lightpeak interface (fast, high bandwidth cable) ---> lightpeak demux to NAND chip
    PCI-E x8/16 interface -----> Mega-channel NAND controller chip ----->
                                                                                                   ----->
    
    
    This way the central controller chip can manage the whole array and include features like online RAID expansion and migration, as well as hot-spare and total CRC/ECC etc, but it would need to be a customised beast. Right now, OCZ's design is much simpler, but it works.
     

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