https://phoronix.com/scan.php?page=news_item&px=Zonefs-Linux-...
https://blog.westerndigital.com/what-is-zoned-storage-initiat...
Någon som har tankar kring detta?
Post från en phoronix medlem:
TL;DR: It's possible to read at significantly lower magnetic flux levels than writing, so they came up with a technology for packing data more densely called Shingled Magnetic Recording (SMR) but it's essentially append-only unless you're willing to wipe and rewrite everything that came before. To mitigate the downsides, the device is broken into "zones" so you only need to erase and rewrite the zone you're in if you want to change its contents.
The gist of SMR is that you write a band of data, then you overlap the next write, leaving only a fraction of the space you originally wrote intact, so you wind up with a write pattern that is reminiscent of laying down shingles on a roof.
An excellent technology for stuff that rarely (if ever) gets changed, like videos uploaded to YouTube or logs.
Last edited by ssokolow; 12-25-2019, 12:00 PM.