Is it possible to change the Raid5 chunk size of an existing device?

Posted by AlexCombas on Server Fault See other posts from Server Fault or by AlexCombas
Published on 2010-10-01T08:59:37Z Indexed on 2011/01/15 4:55 UTC
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Filed under:

linux

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raid

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disk

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software-raid

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mdadm

I have an existing raid5 device which I created using mdadm on Linux.

When I created the device I set the chunk size to 64 but I would like to test the performance of various sizes but I don't want to have to rebuild my entire system to do so.

If it is not possible to do it live then is it possible to do this by booting with a rescue disk?

Any advice on the steps how to do this, either live or with a rescue disk, will be greatly appreciated.

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