Surveillance data is recorded on top of the old one, which means all writes are rewrites and that is the worst case scenario for a SMR drive.
A host-managed drive with carefully aligned zones may avoid this issue in this scenario, but I don't know how far a drive-managed SMR drive can mitigate it.
These drives don't even support TRIM. So I think as far as they're concerned, once the drive is filled, every write is a rewrite no matter the exact workload. I think the concept of drop-in, device-managed SMR, but let's try to hide that is nowhere near as good as what's possible with host management in terms of the write load it can sustain.
Surveillance data is recorded on top of the old one, which means all writes are rewrites and that is the worst case scenario for a SMR drive.
A host-managed drive with carefully aligned zones may avoid this issue in this scenario, but I don't know how far a drive-managed SMR drive can mitigate it.