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    SubjectRe: [PATCH 3/5] ata: Add TRIM infrastructure
    On Thu, Apr 02, 2009 at 08:32:56PM +0400, Sergei Shtylyov wrote:
    > Matthew Wilcox wrote:
    >>> I wonder where to read about the word 169 and commnand 0x06...
    >>> what's it all about?
    >> It's in d2015r1-ATAATAPI_Command_Set_-_2_ACS-2.pdf which can be found on
    >> the t13 website.
    > But since neither ATA/PI-7 nor ATA/PI-8 mention neither the word nor
    > command, why your validity check requires only ATA/PI-7+ compliance?

    Because there are ATA-7 devices which implement this feature.

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