Really? Even ATA flashcard manufacturers? So now I have to know if
CF-card has spinning parts to decide size?
What makes you think so?
Looking at a flash card here (sold as 8 MB), I see
SCSI device sdb: 15872 512-byte hdwr sectors (8 MB)
Now if the manufacturer claimed 8 MiB I could sue him,
but since he only claims 8 MB, this one is large enough
(it has 31 . 2^18 = 8126464 bytes).
It is 8.1 MB and 7.75 MiB.
(i) k=1000, M=1000k, G=1000M
(ii) specifications are rounded down, so that customers cannot complain
(iii) if something exists only in power-of-two sizes, that helps
guessing the actual size; however, this is not true for disks,
and as this example shows, it is not true for CF cards either.
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