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The disk poller keeps evidence it could not collect this poll by looking
up the previous record, first by serial and WWN, then by the Proxmox
source ID and device token. Those last two name a slot, not a disk, and
a replacement in the same slot keeps both. So a replacement reporting a
different serial or WWN took the old disk's retained temperature,
controller, pool and I/O. A replacement record with an empty serial
also took the old serial. The registry keys disks on serial, so the
new disk became the old disk's canonical resource and SMART metric
series, and each later poll carried the borrowed serial forward.
Match on hardware identity through diskinventory.HardwareIdentityMatch,
serial first then WWN, and refuse a slot match when both records carry
a serial or WWN that share no value. Missing identity is still not a
conflict, so Proxmox's literal "unknown" and other placeholders keep
the slot's evidence as before.
The registry's merged disk view keeps the host agent's WWN, which the
agent spells as unpadded NAA 5 fields ("5-c50-a1b2c3d4") while Proxmox
reports "0x5000c500a1b2c3d4". HardwareIdentityMatch now re-pads that
spelling for WWN fields, so the same disk seen by both reporters is
not mistaken for a replacement.