Re: SSD alignment for debian
On 12/22/2012 2:30 AM, Daniel Dalton wrote:
> I've installed debian with a separate /home partition on my samsung 830
> series ssd drive.
>
> I would like to verify partition alignment is correct though.
Regardless of what you've read on the interwebs, there is no such thing
as proper or improper partition alignment on solid state disks. The
physical sector size is 512B, not 4096. So you'll never see the RMW
penalty of AF drives with their 4096B sectors.
Some people try to align to the "erase block" size, but this isn't
possible unless you know this parameter for your drive. No manufacturer
publishes this information, and for good reason.
To add insult to injury, you're a laptop user. Thus you're never going
to put sufficient IO load on the drive to notice a difference between
standard 512B alignment and the theoretically perfect "erase block"
alignment.
So the short answer to your question is:
It's not possible to incorrectly partition an SSD.
--
Stan
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