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How to Grow the mdraid Device? (Doc ID 1148023.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version: 2.6.18 and later   [Release: and later ]
Linux x86
Linux x86-64

Goal

You have some SAN based LUNs configured with multipathing device. And you have configured them together with a soft RAID as disk mirror. 

For example, you are having sda, sdb, sdc, and sdd on SAN1, and having them together as mpath1. 
You are having sde, sdf, sdg, sdh on SAN2, and having them together as mpath2.
At the same time, you configure mpath1 and mpath2 together as md0 at RAID1 mirrored array. 

You would like to expand the size of the mdraid device by expanding the size of the LUNs on each SAN. 

Solution

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