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Host Managed (or Host Aware) SMR disks are fine. You need to do your own zone management using ZAC/ZBC, and throw out your filesystem. The disks all have a co
by jamwt 11y ago
Host Managed (or Host Aware) SMR disks are fine. You need to do your own zone management using ZAC/ZBC, and throw out your filesystem. The disks all have a conventional section near LBA 0 for metadata management (e.g. indices).
Usual tradeoff--more work in software, but far less $.
- codemac 11y agoAh good, now we're talking specifics. Does REPORT ZONES not point to this conventional section always? I cannot wait for a FORMAT ALL ZONES or something command to control the number/amount of conventional sections at the sacrifice of capacity, though it looks like it's not coming. The power guarantees in the zbc spec (as of r03) seem to not be held by some drives. Writing less than a full zone seems to be a bad idea.
- jamwt 11y ago> Ah good, now we're talking specifics. Well, specifics within a hypothetical. Hypotheticals are always game to to discuss. :-) > Does REPORT ZONES not point to this conventional section always? Yep, REPORT ZONES includes the conventional zone. > I cannot wait for a FORMAT ALL ZONES I agree that would be nice, but there are no indications that anyone but the vendor will control conventional vs. sequential layout, sequential sizes, or maximum # of explicitly open zones, anytime soon (absent asking for special favors for a large batch order).