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Forum Discussion
Volume Degraded after disk replacement
Hi I hope somebody can help me! I got a message one day saying one of my two disks have failed (both 4xTB WD reds). So I replaced the bad one with a 4TB Seagate Ironwolf as the newer WD...
This confirms that the data volume is degraded:
md127 : active raid1 sdb3[2](S) sda3[0]
3902166784 blocks super 1.2 [2/1] [U_]
It should say [UU].
But it's hard to say why, since the new disk looks healthy. Try downloading the full log zip file, and look for errors in system.log and kernel.log.
You might also look at the bottom of volume.log, and see if there is anything useful listed there (in the === maintenance history === section).
You shouldn't post the full log zip here. But you can ask the mods ( JohnCM_S and Marc_V ) to review them for you. What you need to do is first upload the log zip to cloud storage (google drive, onedrive, dropbox, etc). Then send a private message (PM) to the mods, using the envelope icon in the upper right of the forum page. Include a download link to the log zip, and also a link to this forum thread.
One possibility is that the new drive is unhealthy, though not totally dead. It does happen. I recommend testing it in a PC (connected via USB dock or internal SATA) with Seatools.
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