Date: Thu, 14 Apr 2016 21:56:22 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Warner Losh <imp@bsdimp.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Heads up Message-ID: <alpine.BSF.2.20.1604142154240.8359@wonkity.com> In-Reply-To: <CANCZdfpnYnVrvhNagYUT9RhAuC1AMCrxh=GCt8RKT0bqxuJybw@mail.gmail.com> References: <CANCZdfpnYnVrvhNagYUT9RhAuC1AMCrxh=GCt8RKT0bqxuJybw@mail.gmail.com>
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On Thu, 14 Apr 2016, Warner Losh wrote: > The CAM I/O scheduler has been committed to current. This work is described > in https://people.freebsd.org/~imp/bsdcan2015/iosched-v3.pdf though the > default scheduler doesn't change the default (old) behavior. > > One possible issue, however, is that it also enables NCQ Trims on ada SSDs. > There are a few rogue drives that claim support for this feature, but > actually implement data corrupt instead of queued trims. The list of known > rogues is believed to be complete, but some caution is in order. Is the list of drives queryable? Is there an easy way to tell if the currently-connected drives are on the list?
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