On 27/12/2010 19:02, Doug Dumitru wrote: [...]
The same rules apply to most SSDs. Most SSDs prefer 4K alignment because of how the FTL (Flash Translation Layers) operate, even though <4K will sometimes still work pretty well.
If I remember correctly, it may be better to align on SSDs at a larger granularity, to the SSDs' erase block size, which may be up to 512K depending on the SSD, though I don't remember at all how well Linux filesystems, VFS, block layer drivers etc. handle SSD TRIM etc.
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