I bought a new 2Tb SSD but it shows up as 1.8TB SSD
[An image of a classical art piece. The man in the image is wearing a hat and has a peculiar facial expression. One of his arms is on a table, palm facing up. The other arm is in the air, with the pointer finger touching the palm. Near that hand is the caption “Where’s my 0.2TB”]
That’s for the magic numbers that hold the 1.8 TB together. They live in that 0.2 TB and if you kill them then the 1.8 TB fly apart at the speed of light.
I for one am getting tired of the Linux circle jerk.
Does Linux have its merits. Heck yeah.
Do I have time as a professional working all day to run and mess with Linux. Heck no.
It’s not that I’m a Luddite, I’m a software developer. And the last thing I want is to configure Linux. Sure it’s easier now, but I’m a nerd and the second i install it imma want to do it right and well there goes my weekends.
That would be 2.2 terabytes. You are on the right track though and metric system conversion is part of the problem. 1000GB != 1024GB. 1,024GB is correct while HDD manufacturers use 1,000GB, which is also correct, but still not equal to 1024GB. (I just confused myself thinking through the conversions, but you get the idea.)
The other part of the problem is hidden partitions used for recovery or performance. There are other things like FAT and such, but I don’t know the modern file layouts these days. (Its probably the same as it always was, TBH.)
The space is usually, mostly, there. It’s just hidden and preallocated.
Edit: Forgot about boot partitions as well. That’s a thing. Additionally, I have seen more than one instance of someone doing 1:1 drive copies without adjusting the partitions for a larger drive. That is less common these days but probably still happens.
More than one system exists to define unit multiples based on the byte. Some systems are based on powers of 10, following the International System of Units (SI), which defines for example the prefix kilo as 1000 (103); other systems are based on powers of 2.
Your system calculates 1 terabyte as 1 tebibyte which is 2^40 bytes=1,099,511,627,776 bytes and the hardware manufacturers calculate 1 terabyte as 1 terabyte which is 10^12=1,000,000,000,000 bytes. That is where the discrepancy is.
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