Messages in this thread | | | Date | Sun, 4 Jan 2009 00:41:51 +0000 | From | "Duane Griffin" <> | Subject | Re: document ext3 requirements |
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2009/1/4 Martin MOKREJŠ <mmokrejs@ribosome.natur.cuni.cz>: > Duane Griffin wrote: >> 2009/1/3 Martin MOKREJŠ <mmokrejs@ribosome.natur.cuni.cz>: >>> Why does not "mount -ro" die when it would have to replay the journal >>> with a message that user must run fsck.ext3 in order to be able to mount >>> it albeit read-only? Still I would prefer having an extra switch to >>> force mount RO while not touching the journal for disk forensics. >>> I think that would also prevent the cases when a LiveCD/rescue distribution >>> would not mount+replay it automagically but user would really have to >>> provide the switch to the command. I am really not using the recovery >>> boot cd to touch my partitions in some cases unwillingly. >> >> Well, that would make things rather tricky. As in, shutting down >> uncleanly would render your system unbootable. > > ??? If I am booted off a CD/DVD drive I just do not want my system > to be touched. I am fine if the dist mounts my drives automagically > in read-only mode but if that currently forces journal replay then no, > thanks. ;)
I agree, it isn't a great situation. Nonetheless, it has always been thus for ext3, and so far we've muddled along. Unless and until we can replay the journal in-memory without touching the on-disk data, we are stuck with it.
We can't refuse to mount an unclean FS, as that would break booting. We also can't ignore the journal by default, if/when we get a patch to do so at all, as that effectively corrupts random chunks of the FS. Fine for forensics and recovery; not so much for booting from.
> M.
Cheers, Duane.
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