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.
