3 ms·
I think you're thinking about SMR - Shingled Magnetic Recording. The tracks overlap because the heads are larger for writing than for reading, so writing can be
by liminalsunset 6y ago
I think you're thinking about SMR - Shingled Magnetic Recording. The tracks overlap because the heads are larger for writing than for reading, so writing can be a destructive process and data must be rewritten when adjacent data is written.
These types of drives are fast for sequential writes, but any operations that edit data may be slow. Additionally, the drive spends time when idle clicking around to "defragment" the shingles IIRC.
- bcrl 6y agoSMR drives are not "fast" for writes. They run at slightly less than the same speed as non-SMR drives do for sequential writes (opening zones has a cost). They are unpredictable and often slow for everything else. SMR drives are somewhat like the first generation of SSD controllers: they lots of glass jaws that nobody ever expects when garbage collection begins to kick in.
- tinus_hn 6y ago> they lots of glass jaws that nobody ever expects Looks like autocorrect got involved here
- bcrl 6y agoI've been having pretty bad luck with autocarrot lately (yes, my phone has learned that word). The word "the" has come out as all kinds of weird things that barely resemble what I meant to type on my phone. It seems partially age related, as it seems to happen more often the older I get.