Date: Mon, 4 Jul 2011 17:53:49 +0300 From: tethys ocean <tethys.ocean@gmail.com> To: Matthew Seaman <m.seaman@infracaninophile.co.uk> Cc: freebsd-questions@freebsd.org Subject: Re: mount /unmount Message-ID: <CAOgxTUga77i5fzOd9p%2BU%2B9fhdHdkEug2B=0BA%2BepjdR%2B_bpxJQ@mail.gmail.com> In-Reply-To: <4E11C059.3090708@infracaninophile.co.uk> References: <CAOgxTUikp5XODhus35vt783s607Y%2Bz8JE3UoxL1dV8f=rS19Kw@mail.gmail.com> <4E11C059.3090708@infracaninophile.co.uk>
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so so thx :) On Mon, Jul 4, 2011 at 4:30 PM, Matthew Seaman < m.seaman@infracaninophile.co.uk> wrote: > On 04/07/2011 13:28, tethys ocean wrote: > > is FreeBSD can boot and run all service while one of slice is not mount > for > > example /usr slice.. > > You can't run a program unless the partition containing it is mounted. > Neither can you run a program if any command interpreter (eg. perl, php, > bash) it uses, or any shared library is similarly not on a mounted > partition. > > In order to facilitate working in single user mode, where just about > every partition except the root is usually unmounted, there is a > selection of useful applications in /rescue -- these are statically > linked so no problems with unavailable shlibs. > > > and second question is my mysql is in /var slice if /var is not mout can > I > > access mysql being root and chek all databases also can read log file on > > /var > > MySQL's default data directory location is /var/db/mysql on FreeBSD. > No, you need to mount /var to verify the information you require. > > > third question is can I mount any unmount slice by using just fsck :) > > If a partition was not unmounted cleanly (eg. the machine crashed, or > the power was cut off suddenly) then fsck(8) should be used to check and > fix any problems on the filesystem. If you've booted into single-user > mode, then definitely fsck any partitions before trying to mount them. > *I guess If I can do fsck without unmount partition I can lost all my data isn't it?* > However, any fsck'ing that the system requires should happen > automatically if you just let the system reboot itself. It's only > occasionally when there are certain problems that fsck needs human input > to resolve that you will be instructed to get onto the console and run > fsck by hand[*]. > > Generally you'ld then use mount(8) to mount any partitions. > > Cheers, > > Matthew > > [*] This is dependent on what sort of filesystems you are using. For > instance, ZFS never needs to stop and fsck in this way. UFS+Journal > won't need it either[+]. > > [+] Sysinstall doesn't support installing a system using these > filesystem technologies: it can be done manually, but that isn't for the > faint of heart. > > -- > Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard > Flat 3 > PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate > JID: matthew@infracaninophile.co.uk Kent, CT11 9PW > > -- Share now a pigeon's flight Bluebound along the ancient skies, Its women forever hair and mammal, A Mediterranean town may arise If you rip apart a pigeon's heart.
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