Re: TRIM/UNMAP/DISCARD via ATA Passthrough

From: Henrique de Moraes Holschuh
Date: Tue Sep 13 2016 - 13:45:27 EST

On Mon, 12 Sep 2016, Jason A. Donenfeld wrote:
> I was wondering if it'd be possible to have the uas driver -- or
> perhaps somewhere else in the stack -- fall back to using
> ATA-passthrough-TRIM for UNMAP, so that discard can work properly.
> AFAIK, the Windows drivers do exactly this.
> If the answer is, "yes we want this! but we don't have the man power,"
> please tell me where I can start looking, so that I can submit the
> patch myself.

Whomever implements this, please add a "chicken bit" to allow the user
to disable it if the enclosure misbehaves.

Henrique Holschuh