4 ms·
Don't some SSDs have 512b page size?
by esperent 10mo ago
Don't some SSDs have 512b page size?
- zokier 10mo agoThey might present 512 blocks to host, but internally the ssd almost certainly manages data in larger pages
- cm2187 10mo agoAnd the filesystem will also likely be 4k block size.
- digikata 10mo agoI would guess by now none have that internally. As a rule of thumb every major flash density increase (SLC, TLC, QLC) also tended to double internal page size. There were also internal transfer performance reasons for large sizes. Low level 16k-64k flash "pages" are common, and sometimes with even larger stripes of pages due to the internal firmware sw/hw design.
- Sesse__ 10mo agoAlso due to error correction issues. Flash is notoriously unreliable, so you get bit errors _all the time_ (correcting errors is absolutely routine). And you can make more efficient error-correcting codes if you are using larger blocks. This is why HDDs went from 512 to 4096 byte blocks as well.