June 9Jun 9 So I noticed that one of my disks started getting a bunch of read errors and I decided to replace it with a larger drive.I shut down the array, turned off the server, replaced the drive and booted up the server again.Started a preclear on the new drive. Note: I did not start the array back up.During the preclear I went back to the main menu and noticed that my two parity disks were missing in addition to the old disk. I then checked the unassigned devices and found both disks there along with the new disk that is being precleared.I then tried to add the parity disks back in their respective slots but all I see in the drop down is the new disk.Why is this happening and can I fix it somehow? Otherwise I can't rebuild my array.
June 9Jun 9 Community Expert Multiple disks are not being initialized correctly, can you post a link to the Asmedia controller you are using? It appears to have port multipliers, which are a known problem.
June 9Jun 9 Author I think it's this one. It's just a PCI to SATA adapterhttps://www.delock.com/produkt/89384/merkmale.html
June 9Jun 9 Community Expert Solution That has SATA port multipliers and is not recommended; it doesn't mean it's the problem, but it should be replaced anyway https://forums.unraid.net/topic/102010-recommended-controllers-for-unraid/Try connecting or swapping the disks that are not being detected to the onboard SATA controller.
June 9Jun 9 Author Ok. I understand. Thanks for checking this out.Just want to double check something before I do what you suggested. "Try connecting or swapping the disks that are not being detected to the onboard SATA controller.", they are being detected as they show up in unassigned devices. It's just that they don't show up in the list of available drives for the parity. What is the difference?Thank you for the help so far.
June 9Jun 9 Author I moved the parity drives to the on board SATA ports (luckily I had two unused ports left) and rebooted the server. Now the parity drives show up as they should and I have started the array with the new drive as well. So far it's writing data back to the new disk. So far so good.Thank you very much for the help on this but I still wonder why I could see the drives as unassigned devices (and probably mount them too if I wanted) but were unable to set them as parity drives.Will set this as solved. Thanks again.
June 9Jun 9 Community Expert 52 minutes ago, cadmiumcadamium said:why I could see the drives as unassigned devices (and probably mount them too if I wanted) but were unable to set them as parity drives.FYIParity has no filesystem so is not mountable.
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