Mucking with a mounted filesystem?

[Bill McGonigle]

On 07/09/2009 04:14 PM, Kenny Lussier wrote:
> I am running into a disk space issue on an older server. I'd like to
> do a tune2fs -m 1 (or maybe 0) to get rid of most, if not all of the
> reserved block space on the partition that is close to full. The disk
> is actually an iSCSI volume mounted from an EqualLogic array, and then
> exported via NFS to 6 other servers.

I think that kind of superblock info is only consulted at mount time, so
probably nothing will notice if you do it, but you won't get any benefit
until you mount again.

Does '-o remount' consult the superblock or only process things that can
be expressed as mount options?  The man page only says:

  "all ext2fs-specific parameters, except sb,
  are changeable with a remount"

but 'sb' is one that has -o semantics.

-Bill

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