Date: Sun, 21 Sep 2014 10:34:54 +0200 From: Matthias Andree <matthias.andree@gmx.de> To: freebsd-scsi@freebsd.org Subject: Re: How to disable hard disk write cache? Message-ID: <541E8DAE.8010407@gmx.de> In-Reply-To: <54184484.1070304@delphij.net> References: <541804B0.7070407@gmail.com> <54184484.1070304@delphij.net>
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Am 16.09.2014 um 16:09 schrieb Xin Li: > Modern SATA/SAS/SCSI devices usually comes with the capability of > tagged commands, allowing the OS to know when a write buffer is on > stable storage. With this, file systems can easily implement the > right semantics and recover from e.g. a power outage, etc. Yes, they *can easily implement* that, but which file systems in FreeBSD *actually do* that? Do we have a list which file systems are safe to use with WCE=1 as long as they do NCQ? And what do you need to do on those Samsung drives where NCQ is flakey (HD103SI for one)?home | help
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