On Mon, Mar 23, 2015 at 7:14 PM, Keith Keller
<kkeller@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> On 2015-03-23, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> wrote:
>>
>> For future reference -L is a big hammer. If you use it without
>> explicitly attempting a read-write mount (which a read only mount at
>> boot time will not do because it's an ro mount by default)
>
> ...for the root filesystem, anyway. For nonroot filesystems it should
> use whatever flags are set in fstab. (Granted many boxes likely have /
> as the only on-disk fs.)
Even the root ro to rw remount swicheroo is antiquated. Not ext3/4,
XFS, nor Btrfs want you to run an fsck on an ro mounted volume. Both
e2fsck and xfs_repair use strong wording saying not to do it, to the
point I think it's crusty weirdness to keep the code allowing things
like "dangerous" mode repair. The btrfs check tool on the other hand
will neither check nor repair a mounted volume - it's actually a
nearly last resort there. Usually normal mount fixes things, and if
not the first option is to use -o recovery mount option.
--
Chris Murphy
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