Something
public text v1 · immutableflaptoppy ~ # dd if=/dev/zero of=/tmp/bla.tmp count=2048 bs=1024
2048+0 records in
2048+0 records out
2097152 bytes (2,1 MB) copied, 0,0135133 s, 155 MB/s
That should be 2
sd 4:0:0:0: [sdb] 1014784 512-byte hardware sectors (520 MB)
My USB drive, simple math will show it should be 495.5 (in 1024's) it's 520 in 1000's