Yes, you can use raw block devices in Linux. LMDB works on raw block devices as well. You get write-through cache behavior; writes are immediate but everything

Yes, you can use raw block devices in Linux. LMDB works on raw block devices as well. You get write-through cache behavior; writes are immediate but everything still goes into the page cache. I've not yet bothered to check how things work with raw devices in Windows. I believe only Admins can even operate on them so it would be kind of limited usefulness.