>On 2012-06-12, Peter Laufenberg <open...@laufenberg.ch> wrote: >>>On 06/11/12 19:25, Jens A. Griepentrog wrote: >>>> Let me know, please, whether it makes sense to modify disk geometry >>>> for solid state disks? >>> >>>If you knew what physical block size your SSD worked with, you might -- >>>MIGHT -- see some benefit using that, but the 4k offsets seem to work >>>just fine. I doubt you would feel any difference... >> >> Intel's answer about X25 SSDs' erase block size on their support forums is >> pretty much "fuck off". > >Some SSD controllers use compression, so even if you have details >of flash block sizes you can't make any calculations about partition >alignment based on them.
The _erase_ block size surely is power of 2 and fixed. Even if the controller uses some elaborate Russian doll blocks, any formatting recommendation would be better than Intel's verbatim "we don't disclose that". It's a policy decision; they ship some bloatware Windows7-only extension. I don't know if other manufacturers are such pricks they won't tell you how to best use their hardware, I know my next SSD won't be from Intel. -- p
