dd blocksize when copying to SSD disk
Christoph P.U. Kukulies
kuku at kukulies.org
Wed Aug 31 16:35:40 UTC 2016
I'm about to copy an existing Windows 7 system to an SSD. Source drive
is a hard disk of 256 GB, destination drive a 500 GB Samsung SSD 850 EVO.
Given the fact that unnecessary write operations to SSDs should be
avoided I'm thinking about the best strategy to use dd to write to the SSD.
The disk has a capacity (from linux-fdisk): of 500.1 GB (500107862016 bytes)
That's 976773168 sectors. It has reportedly 60801 cylinders ( 255
heads, 63 s/t gives 16065 sectors/cyl).
When I calculate 976773168 / 60801 I'm getting 16065.0839... sectors /
cyl - why this uneven number? Is there an incomplete track left over?
After all, what would be the appropriate "bs"-parameter for the dd-command?
What about socalled "alignment"?
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