On Tue, Jan 07 2025 at 11:05:11 AM, Michael Stone <mst...@debian.org> wrote: > On Tue, Jan 07, 2025 at 10:44:00AM -0500, 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? > > TB is about 10% larger. One of the worst crimes in computer history > was ever talking about storage in powers of 2, I really wish it would > just go away. It has properties that nobody wants and has been the > source of endless confusion, for really no benefits whatsoever.
I point people to http://www.tarsnap.com/GB-why.html which is where I was first enlightened. -- regards, kushal
