Hi all
In the wiki
(https://raid.wiki.kernel.org/index.php/Growing#Expanding_existing_partitions)
there's mention of increased vulnerability to failure when growing an
array because disks have to be failed before additional disks can come
into play.
Are there plans to allow a disk migration/clone feature in future? If
not having this feature built-in, would dd (or GNU ddrescue) perhaps be
used to do this manually? The only down side I can see to doing it
manually is that it would likely require downtime. See below.
2-disk RAID0 (Simplest for illustration purposes, also impossible to do
with current procedure):
02468AC <- disk0
13579BD <- disk1
Introduce a new larger disk intended to replace disk1 and sync the data
across:
02468AC <- disk0
13579BD <- disk1
13579BD------- <- disk2
Fail/remove disk1:
02468AC <- disk0
13579BD------- <- disk2
The current procedure has us degrade the array before we put any data
onto the larger disk2.
--
Brendan Hide
+27 83 448 3867
http://swiftspirit.co.za/
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