Menion, > Operating big capacity HDD such 8TB with complex filesystems like > BTRFS in RAID mode endup in dmesg get flooded by this log, due too > many capacity checks (opaque to the filesystem itself) What's your definition of flooded? How many do you see? Also, what kind of controller are these disks attached to? The reason you see these messages is that to the kernel it looks like a legacy disk device that predates capacities in the TB range. The warnings are logged because we're surprised to be going down this path based on what the device has previously told us. -- Martin K. Petersen Oracle Linux Engineering