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Official Erase Block Size for 320 Series?

idata
Esteemed Contributor III

I would like to know the Erase Block size for the Intel SSD 320 series.

Of course I need it to be able properly align partitions, in OS X.

Is it 128k or 512k or something else?

Pls. only confirmed sources, not guessing, and not saying, it does not need to be aligned.

Thanks!

7 REPLIES 7

idata
Esteemed Contributor III

Why am I concerned? There's a ton of info on forums regarding partiotion alignment on SSDs and how this effects performance.

Ideally partition boundaries match Erase Block Size boundaries.

I would like an official answer... On other, competitor's products (SSDs), this is publicly available info.

If Intel has a secret technology and does not want to make the answer public, it is fine, just help us by telling us what proper partition boundaries are.

idata
Esteemed Contributor III

You, like most people on forums (so don't feel alone), are misunderstanding the technology. The erase block size doesn't matter nor does it have anything to do with performance -- it's the NAND flash page ("cell") size and alignment that matters.

Please take the time to read the following Wikipedia page, which explains how all of this works. Again: NAND flash page ("cell") size is what you need to be confirmed about, not the erase page size.

http://en.wikipedia.org/wiki/Write_amplification http://en.wikipedia.org/wiki/Write_amplification

You'll want to read sections titled "Basic SSD operation", "Garbage collection", "Background garbage collection", and "Over-provisioning". Don't just skim and look at the pretty pictures -- you need to read the text to understand fully.

idata
Esteemed Contributor III

Hello,

Any benefits if I make NTFS page size 8K instead of default 4K in this case?

One SSD cell will hold only one piece of data - or something like that

thanks

Vilius