Horge

Missing 2/8 disks on Areca 1880 (raid 6)

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Hi. I have an Areca 1880IX-12 with a raid-6 set, containing 8x2TB. The 1880-card malfunctioned (the internal expander died), and I received a new card from Areca.

The new card shows two of the devices as "Missing" from the raid set, and the same disks are labeled "Free" in the device list. I have not done anything yet, other than let the system boot. There are also two disks in a raid-1 set (OS), and this raid set is acting fine.

Because this is raid-6, missing 2 out of 8 disks should not be a disaster, and my first thought was to add the two missing devices as hot-spares to the raid set, and then let the raid set rebuild itself.

But to be sure to do this in the right order, I have searched and read a lot of different posts about the topic, but none of them seems to be exactly like my situation. I therefore thought that it's better to be safe than sorry, and ask here if someone can guide me back to a healthy raid set.

What are the correct commands, and in what order?

Additional info in screencaps. If more information is needed, please don't hesitate to ask. =)

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Strange that those two disks aren't showing up as foreign vs free. Regardless of that though if the volume has been powered up, those two disk will be too old now that data has changed (even minute amounts). I'd start to migrate data off the old volume to a temp landing zone, and then create a new RAID volume with all your disks.

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Areca has a LeVeL2ReScUe to re-add disks that were part of an array but lost and no longer recognized, but be extremely careful with it. I haven't had to use it in a while so my memory is fuzzy-- you'll need to use your google-fu to check around.

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