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Devnull
Asked: 2019-08-27 08:14:41 +0800 CST

Cannot re-add cache device to zpool

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I have a cache device that fell out of the zfs array because of errors. Im pretty sure it was something i did - messing with cabling or something. It checks out fine, plus its just a cache device. When i try to readd it, it fails with the following error:

# zpool add array cache /dev/sdj2
cannot add to 'array': one or more vdevs refer to the same device

is there a way to remove the reference from the zpool array so i can readd it? ive tried remove:

# zpool remove array /dev/sdj2
cannot remove /dev/sdj2: no such device in pool
zfs

2 Answers

  1. Try exporting your pool and re-importing it via path or id labels. Then you should be able to remove / add your cache device.

    For example:

    • zpool export array
    • zpool import array -d /dev/disk/by-path/
    • zpool remove array <dev> as needed.
    • 1
  2. Best Answer

    i needed to remove/recreate the zfs partition on the disk itself. after that, i was able to readd it.

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