Date: Sun, 02 Jun 2002 10:33:33 -0600 From: Chris Fedde <chris@fedde.littleton.co.us> To: Patrick Thomas <root@utility.clubscholarship.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: use of fsck -y Message-ID: <200206021633.g52GXXQW048693@fedde.littleton.co.us> In-Reply-To: <20020602071202.U18408-100000@utility.clubscholarship.com>
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On Sun, 2 Jun 2002 07:15:08 -0700 (PDT) Patrick Thomas wrote:
+------------------
| > vnconfig /dev/vn0 /prisons/1a
| > mount /dev/vn0c /mnt/point
| > if [ $? != 0 ]
| > then
| > fsck -y /dev/vn0
| > mount /dev/vn0c /mnt/point
| > if [ $? != 0 ]
| > then
| > echo Mount fails even after fsck. Better check this by hand
| > fi
| > fi
| > /mnt/point/apachectl start
|
| If I understand correctly, this does the fsck only if it comes up dirty ?
| But skips it if it comes up clean ?
+------------------
this does the fsck only if the mount fails.
+------------------
| > BTW. softupdates might also give you some performance advantages
| > on peudo disk device filesystems.
|
| Will softupdates make fsck irrelevant ? That is, is it like journalling
| in the sense that I can cut the power and not lose anything ? Or do I
| still need to fsck after a crash ?
+------------------
Softupdates ensures that the filesystem is always consistent on
disk. It also reduces the number sync operations which improves
create/delete performance and read/write on small files. A hard
crash still will not mark the file system clean so a plain mount will
fail. I've not experimented much with force mounting unclean
softupdate enabled file systems. But I've never had a softupdate
file system fail fsck -p.
--
Chris Fedde
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