newb ?: sdxc card instead of 2nd drive?

Discussion in 'Mac mini' started by LucasLand, Jan 29, 2013.

  1. macrumors 6502a

    LucasLand

    Joined:
    Mar 6, 2002
    Location:
    New England
    #1
    i noticed a lot of people install a 2nd HD in the mini. they also deal with having to install it without screwing up and/or trying to decide if it should be a an HD,fusion or ssd.

    Whats wrong with just using the sdxc card slot? I believe i read these cards go up to 2 tb. it seems to me to be much easier to just use these cards since they come in different sizes and no need to open the mini.
     
  2. macrumors 68040

    Joined:
    Dec 17, 2009
    #2
    Speed. These cards are slow compared to a mechanical drive and no where near an SSD. Fine for some basic data storage but I wouldn't use it long term.
     
  3. macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    #3

    you can get a fast one but the price is too high

    the one below reads and writes about 140MB/s but it is 300 dollars and is small 64gb

    http://www.bhphotovideo.com/c/produ...GCTBNA1000_64GB_CompactFlash_Memory_Card.html

    if you want that route of doing external the lacie rugged t-bolt is 256gbssd 4x the size and 3x the speed for 349



    http://www.bhphotovideo.com/c/product/901227-REG/LaCie_9000352_256GB_Rugged_USB3_Thunderbolt.html


    comes with cables
     
  4. paulrbeers, Jan 29, 2013
    Last edited: Jan 29, 2013

    macrumors 68040

    Joined:
    Dec 17, 2009
    #4
    However, generally the SD card slot is "attached" to the computer via USB. I haven't looked at the 2012, but traditionally they are hooked to a USB 2.0 port which means they top out at about 32Mb/s regardless of the card speed. Not at home to check kind to see what the new ones are hooked to...

    Edit: At least for the Macbook Pro, the SD Card is attached via the PCIE bus so then it would be a matter of how fast the card is. Although as pointed out fast SD cards are rediculously expensive.
    http://forums.macrumors.com/showthread.php?t=1385807
     
  5. macrumors newbie

    Joined:
    Nov 28, 2012
    #5
    Mac mini 2012,

    Built in SD Card Reader:

    Vendor ID: 0x14e4
    Device ID: 0x16bc
    Subsystem Vendor ID: 0x14e4
    Subsystem ID: 0x0000
    Revision: 0x0001
    Link Width: x1
    Link Speed: 2.5 GT/s

    I'm thinking this also indicates it's attached to PCIe in the Mac mini 2012.
     
  6. macrumors member

    Joined:
    Oct 2, 2006
    #6
    Found this from a quick google search:
    Code:
    2.5 GT/s on PCI-Express = 250MB/s
    
    This is how that's worked out... note 'b' = bits, 'B' = bytes, 8b = 1B.
    
    2.5 GT/s = 2.5 Gb/s = 312.5 MB/s... then you've got 8b/10b overhead so 312.5 * 0.8 = 250 MB/s.
    
    Not too shabby! :D
     
  7. macrumors 68040

    Joined:
    Dec 17, 2009
    #7
    Yep looks like it is attached to a single PCIE lane same as the Macbook Pro. Very interesting. I still wouldn't use it for long term/bulk storage as it is just too expensive for what "little" performance you get (comparing to a normal SSD that is).
     
  8. macrumors 68040

    Giuly

    #8
    It's SATA-II, and not really future-proof. The Akitio Neutrino Thunderbolt Edition on the other hand is (the only bus-powered single 2.5" with) SATA 6Gbit/s and the drive is easily accessible, so it runs a OCZ Vector, the Intel 330 that's included or one of those Asian SSDs full speed.
    [​IMG]
     

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