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a coder
Asked: 2016-07-22 06:29:45 +0800 CST

Replacing all drives on an existing RAID 1 + RAID 5 setup - all at once or one at a time?

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I'm looking at upgrading hard drives in a PowerEdge R720 and need a little guidance.

Current configuration:

OS: CentOS 6.5
Drives: 
2 x 300gb drives (RAID 1)
4 x 600gb drives (RAID 5)

I have 6 new 1.2TB SAS drives that need to be swapped in.

  1. Can I add a 1.2TB drive where a 600GB drive used to live?

  2. Since #1 would take a while, would it be possible to swap all the drives out at once while retaining the RAID config? All data will already be backed up elsewhere, just wondering if swapping them out all at once will kill the existing RAID config or if that is saved on the Perc H710 card.

hard-drive raid hardware-raid

1 Answers

  1. Best Answer

    One disk at a time.

    Let each drive rebuild successfully, then replace the next drive.

    That's all.

    (replacing all disks at the same time == data loss - don't do that!)

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