Hi Rafal,

performance degradation is expected and normal while a system is in degraded mode or recovering from a failure.
(Apart from that I think a latency of 0.4ms is not too bad...)

2 possible solutions to reduce impact:

Hope that helps

Sebastian


On 05.02.2013 09:04, Rafał Radecki wrote:
Hi All.

I am new to this forum and quite new to NetApp. I work on FAS3210 with
8.0.2 7-Mode.
We have 22 SAS disks in our appliance. The aggregate is:

aggr status

Aggr State           Status            Options
aggrX online          raid_dp, aggr     root
                            degraded
                            redirect
                            32-bit
because we have lost 2 disks 2 days ago (one spare and one data disk,
NetApp has sent new disks to us).
The problem is that the appliance is performing bad in this situation.
NFS latency in file operations changed from for example 0,04ms to
0,4ms.
I know that the aggregate is now using parity disks in place of one of
the failed disks but is this performance drop common?
Are there any known ways/howtos to cut down this problem?

Best regards,
Rafal Radecki.
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