On 1/7/25 10:44, Dan Purgert wrote: > On Jan 07, 2025, Stefan Monnier wrote: >>> 8 TB is not that big. I have a external 18 TB drive. It is 18 TB in name >>> only though! After fromating it with ext4 it only had 15TB of usuable >>> space. >> >> 18TB "on paper" is usually 18 * 1000^4 bytes, so if you convert this >> into "computer units" is ~16.37 * 1024^4 bytes. If you then make an >> ext4 filesystem on it with the customary 5% reserved for root, that gets >> you down to 15.5TB, to which you also have to remove the space used by >> inodes, so yes, probably about 15TB and of course, once you start >> putting actual files ion the drive, additional space will be used by >> directories and metadata. > > Now now, let's not derail a rant with facts :) > > That being said, I thought the variance from TB -> TiB was 10%; or have > I gotten it backwards?
My intuition votes for 1-1000/1024 = 1-125/128 which is approximately 2.35% but it's been wrong before.
