On Thu, Feb 24, 2022 at 01:09:53PM +0100, Emmanuel Florac wrote: > Le Thu, 24 Feb 2022 08:10:06 +1100 > Dave Chinner <david@xxxxxxxxxxxxx> écrivait: > > > From the storage side, you really want to expand the storage with > > chunks that have the same geometry (stripe unit and stripe width) > > so that it doesn't screw up the alignment of the filesystem to the > > new storage. > > That part should be easy, I plan to use the same type of hardware anyway > (12 TB Ultrastar disks). > > > And that's where the difficultly may lie. If the existing storage > > volume the filesystem sits on doesn't end exactly on a stripe width > > boundary, you're going to have to offset the start of the new > > storage volumes part way into the first stripe width in the volumes > > to ensure that when the filesystem expands, then end of the first > > stripe width in the new volume is exactly where the filesystem > > expects it to be. > > That should be somewhat more manageable given that I've setup > everything as an LVM volume. I may use partitions on the new devices to > precisely align the PVs before expanding the LV. You can use the PV/LV header size options to align the contents of the LV. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx
