Date: Sat, 17 Oct 2009 03:39:17 +0100 From: RW <rwmaillists@googlemail.com> To: freebsd-questions@freebsd.org Subject: Re: Unknown devices Message-ID: <20091017033917.6d7f04ee@gumby.homeunix.com> In-Reply-To: <20091015003803.f015b721.freebsd@edvax.de> References: <BAY113-W47E3BAA91160A0160290C8CDC60@phx.gbl> <20091015003803.f015b721.freebsd@edvax.de>
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On Thu, 15 Oct 2009 00:38:03 +0200 Polytropon <freebsd@edvax.de> wrote: > On Wed, 14 Oct 2009 23:04:51 +0400, Arkady Tokaev > <tokaev@hotmail.com> wrote: > > > > While I was trying to update ports I have received message > > about absence disk space.It's impossible, I thought.But df > > command said: > > > $ df -h > > Filesystem Size Used Avail Capacity Mounted on > > /dev/ad0s1a 23G 3.5G 18G 16% / > > devfs 1.0K 1.0K 0B 100% /dev > > /dev/md0 9.4M 2.8M 6.5M 30% /etc > > /dev/md1 31M 16M 13M 55% /usr/local/etc > > /dev/md2 19M 18K 19M 0% /root > > /dev/md3 31M 6.1M 24M 20% /var > > $ > > What is the md devices?How I can remove them? > > See "man md": The md devices refer to memory disks, RAM that > "emulates" a hard disk. > > Sadly, I don't recognize a reason why your /etc, /usr/local/etc, > /root and /var subtrees are mounted onto memory disks... seems > that you're not running a default install, do you? I would imagine that they're vnode md devices that each have a file on the root filesystem as a backing store. I've never tried it myself but you could do this as an alternative to conventional partitioning. It's a little less efficient, but they can be resized. I'm not aware that sysinstall can install like this though - perhaps it's pc-bsd or something. There should lines like mdconfig_md0="..." defining the devices in rc.conf
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