From: "Paramasivam, Meenakshisundaram" <mparamas@iupui.edu>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: mdadm grow to double the capacity
Date: Tue, 26 Nov 2019 02:26:47 +0000 [thread overview]
Message-ID: <1574735207490.32532@iupui.edu> (raw)
Hi,
I have raid-6 mdadm array with 8 drives (5 TB each), and a total of 30 TB usable space. XFS is created on this volume. Since I am about 85% used, I want to add 6 more drives to this existing array in raid-6 to take this array to 60 TB with 14 drives in raid-6.
What would be the fastest (and safest) way to grow the raid-6 array from 8 disks to 14 disks? I am assuming I can first add the 6 drives, and grow all at once with the command:
mdadm -v --grow --raid-devices=14 /dev/md2
How long will this take (estimate)? Should I umount xfs before attempting to grow the mdadm array?
I am aware that I need to grow xfs after the mdadm grow operation.
Please let me know or point to tips. Thanks.
Sundar
reply other threads:[~2019-11-26 2:33 UTC|newest]
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