The mkfs command might be unable to create a file system on disks with a certain disk geometry and whose sizes are greater than 8 Gbytes. The derived cylinder group size is too large for the 1-Kbyte fragment. The large size of the cylinder group means that the excess metadata cannot be accommodated in a block.
The following error message is displayed:
With 15625 sectors per cylinder, minimum cylinders per group is 16. This requires the fragment size to be changed from 1024 to 4096. Please re-run mkfs with corrected parameters.
Workaround: Use the newfs command instead. Or, assign a larger fragment size, such as 4096, when you use the mkfs command.