SSD sector specifications issues

[Lennart Sorensen]

On Mon, Jul 14, 2014 at 07:16:26PM -0400, William Muriithi wrote:
> Evening,
> 
> I have a system running on INTEL SSDSC2BA40 drives and unfortunately its
> not doing well performance wise. I also don't have physical access and on
> top of that, its running vmware which doesn't do a good job like Linux in
> querying hardware specifications.
> 
> So I have been forced to use Google in trying to find the size of its
> physical sector. Nothing worth reading seem to show up on Google.
> Disappointed that Intel haven't done a good job documenting it.
> 
> Anyone have one of these drives directly hosting a Linux installation?
> Would be grateful if you can share the output of hdparm from this drive.
> 
> The system is currently using 512 sectors, but I suspect the SSD native
> sectors are 4096.

More likely 64KB these days as far as I know.

And ext* tends to default to 4KB block sizes, so the sector size is
not important.

There are reasons partitions are aligned on 1MB these days.  SSD nand
block sizes will most likely just keep getting larger after all.

If your partitions are NOT aligned to a nice power of 2 though you could
really be annoying the SSD.

-- 
Len Sorensen
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