Control: retitle -1 e2fsprogs: resize2fs(8) man page suggests ext3 on-line
resize always possible
On Sat, 2 Nov 2013, Theodore Ts'o wrote:
The "Filesystem does not support online resizing" message is emitted
when the resize_inode feature is not set on the file system. This can
happen because the file system was created without the resize_inode
present, which reserves block group descriptors which are needed so we
can resize the file system with out requiring moving the inode table
blocks (which is not something we can do for an online resize).
That would explain it. I think this filesystem was created in 1999 as
ext2, so it's lacking quite a lot of features, resize_inode among them.
I think this is a documentation bug, though -- the man page for resize2fs
says about on-line resizing:
# If the filesystem is mounted, [resize2fs] can be used to expand the
# size of the mounted filesystem, assuming the kernel supports on-line
# resizing. (As of this writing, the Linux 2.6 kernel supports on-line
# resize for filesystems mounted using ext3 and ext4.).
I think it would be appropriate for the man page to mention that some ext3
filesystems can't be resized on-line so as to avoid wild goose chases like
mine.
--
Ben Harris, University of Cambridge Computing Service.
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