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Asked: 2021-03-15 12:36:24 +0800 CST

Can an ex-RAID 1 drive (mdadm) be mounted normally?

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I currently have a one-disk ext4 NAS using Ubuntu Server 18.04 on my LAN to which I am considering attaching another identical disk in RAID 1 using mdadm. But I am wondering if, following a catastophe of some sort, I would be able to mount one of the RAID 1 disks on another computer as a normal drive, as I currently could, or is it a case of once a RAID drive, always a RAID drive?

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1 Answers

  1. You can't mount RAID 1 disk directly (if yes I don't know how), but you can create RAID 1 array with only one disk (from your NAS) on another computer. For that you can use command :

    mdadm --assemble --readonly /dev/md0 /dev/sdX (readonly)

    or

    mdadm --assemble --run /dev/md0 /dev/sdX
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