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  • Is that a SSD drive? Probably will not help, but I would try fstrim. Commented Aug 26, 2022 at 12:44
  • It's a RAID 1 array on HDDs. Commented Aug 29, 2022 at 5:54
  • The result from fdisk makes little sense. For example, sda1 does not use 512000 blocks of 512 bytes each; looking at the start and end block address it uses 1024000 blocks Commented Sep 9, 2022 at 20:41
  • It's CentOS 7. I tagged both to get more audience, because there is no noticeable difference between the two. At least not on the part of filesystems support and management. Commented Sep 12, 2022 at 7:16
  • You did run du -hs / as root didn't you...? Commented Sep 12, 2022 at 15:35