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However, with LVM you can easily grow a logical volume. But, you cannot use stripe mapping to add a drive to an existing striped logical volume because you can’t interleave the existing stripes with the new stripes. This link explains it fairly concisely.
“In LVM 2, striped LVs can be extended by concatenating another set of devices onto the end of the first set. So you can get into a situation where your LV is a 2 stripe set concatenated with a linear set concatenated with a 4 stripe set.”
Taken: Pick Your Pleasure: RAID-0 mdadm Striping or LVM Striping?
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