I am not sure recover slows down . But for sure degraded mode performance will be lower, especially read performance will be worse as data need to be recovered/computed. Same with recovery mode for read. But write performance should not affected. May be I am wrong.

-----Original Message-----
From: linux-raid-owner@vger.kernel.org [mailto:linux-raid-owner@vger.kernel.org] On Behalf Of hank peng
Sent: Friday, January 08, 2010 8:24 PM
To: linux-raid
Subject: Can I skip recovery for RAID5 in this way?

For my platform, recovery when creating a raid5 array or adding a new
disk to a degraded raid5 array is not only time-consuming but also cpu
cost. I am thinking now when every write into a raid5 stripe, if we
only use reconstruct_write method, can I use this way to skip
recovery?
BTW, my appliation mainly focus on sequential write and I can also
limit the number of disks in raid5.
Please correct me if I am wrong, maybe my way is stupid.

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The simplest is not all best but the best is surely the simplest!
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