> My ThinkStation runs CentOS 7 which I installed on a BIOS RAID 0 setup > with two identical 256 Gb SSDs after removing Windows. It runs fine but I > just discovered in gparted something that does not seem right: > > - Launching gparted it complains "invalid argument during seek for red on > /dev/md126" and when I click on Ignore I get another error "The backup GPT > table is corrupt, but the primary appears OK, so that will be used." I > then click on OK whereupon I again see the second error message. I then > see "Not all of the space available to /dev/sdb appears to be used, you > can fix the GPT to use all of the space (an extra 6832 blocks) or continue > with the current setting? " I click on Fix but nothing seems to happen. I > am not sure what /dev/md126 is but it is the exact same size as sda and > sdb which I believe are the two RAID disks. I also have two other hard > disks which seem to be fine, one using XFS, the other ZFS. > > Does this look familiar to anyone? Given the error messages it seems this > is something I ought to fix sooner rather than later. Any idea what I > should do? I'm a bit confused what you have here. Did you mix pseudo hardware RAID (BIOS RAID 0) with software RAID here? Because /dev/md126 clearly is part of a software RAID. Regards, Simon