Unmap

Discussion in 'Mac Accessories' started by cube, Aug 13, 2014.

  1. cube macrumors G5

    Joined:
    May 10, 2004
    #1
    Do the Apple UASP drivers have UNMAP?

    So that if one finds an UASP enclosure which translates UNMAP into TRIM we would have an external SSD solution? (which might require a "trim enable" trick to be applied to the driver).
     
  2. cube thread starter macrumors G5

    Joined:
    May 10, 2004
    #2
    I have to get a confirmation, but ASM1053_6G enclosures might support UNMAP.

    First, UASP is indeed supported.

    Second, Windows device UAS feature certification requires SBC-3 support since 1st March 2012. This SCSI command set includes UNMAP.

    This seems to be the certification for this chipset, at later dates than that:

    https://sysdev.microsoft.com/en-us/...ails.aspx?ProductID=9461&OrganizationID=14162

    I have to get confirmation about the UNMAP support.

    Then the question would be, what about Mac drivers that use UNMAP?

    It seems that it pays to look for Designed For Windows even for Mac users.
     

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