Date: Thu, 4 Jul 2013 14:01:14 -0700 From: Jeremy Chadwick <jdc@koitsu.org> To: Mike Jakubik <mike.jakubik@intertainservices.com> Cc: freebsd-stable@freebsd.org Subject: Re: UFS Trim wont stay set Message-ID: <20130704210114.GA98690@icarus.home.lan> In-Reply-To: <51D5DFA6.6010202@intertainservices.com> References: <51D5CEF8.9000504@intertainservices.com> <20130704203342.GA98181@icarus.home.lan> <51D5DFA6.6010202@intertainservices.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Jul 04, 2013 at 04:48:38PM -0400, Mike Jakubik wrote: > On 07/04/13 16:33, Jeremy Chadwick wrote: > >Yup, experienced this myself many times over. The reasons are > >understood (it's not limited to just the TRIM bits, it's related > >to anything adjusting the superblock -- it gets cached in memory > >in certain situations and not flushed back to disk). Hint: are you > >booting into single user and then issuing a "mount" command before > >doing your tunefs stuff? If so, this is probably what's causing it > >(at least it was in my case). Instead just boot into single-user, > >do not mount anything, and use /sbin/tunefs (if available -- > >depends on your filesystem setup) or /rescue/tunefs. > > I booted in to single user mode and the system mounted the only file > system there, which is mounted at /. What i did now however is boot > off a Live CD and run tunefs, this did the trick! I talked with Andriy Gapon a couple years ago about this, actually. I had to dig up the thread. Here are the relevant parts (read in order): http://lists.freebsd.org/pipermail/freebsd-stable/2011-June/062921.html http://lists.freebsd.org/pipermail/freebsd-stable/2011-June/062922.html http://lists.freebsd.org/pipermail/freebsd-stable/2011-June/062923.html http://lists.freebsd.org/pipermail/freebsd-stable/2011-June/062924.html Make sure you read Andriy's comments (2nd URL) in full. My follow-up (4th URL) confirms that the "mount -a" (which is what made / read-write since /etc/fstab obviously has / as rw) was causing the issue. He explains the reason. -- | Jeremy Chadwick jdc@koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Making life hard for others since 1977. PGP 4BD6C0CB |
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20130704210114.GA98690>