RAID5 write hole?

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Hi:

Recently I heard of the so called "write hole" problem of raid5 in
Linux software raid. I use ext4 filesystem on my NAS, which assembles
data disks using Linux software raid. So I wonder how safe my such
system!

If the "write hole" is inevitable, will it result in the corruption of
ext4 filesystem? 

-- 
Shaochun Wang <scwang@xxxxxxxxx>

Jabber: fungusw@xxxxxxxxxx
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