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rcourtman
c511c935b3
On the #1483 reporter's Proxmox node a SATA SSD (INTEL SSDSC2BW240A4) never
appeared in Pulse even though smartctl reads it fine, because the agent's
discovery and probing both had single points of failure:
- Discovery trusted smartctl --scan-open exclusively whenever it returned at
least one target. The scan silently omits any device it fails to open at
scan time (the failure is only a #-comment in its output), so one bad open
hid a real disk while its neighbours were listed.
- A scan-provided -d type got exactly one probe attempt on Linux. A type whose
full query (-i -A -H) fails or returns nothing dropped the disk silently.
- A probe yielding no usable SMART data dropped the disk entirely instead of
reporting the identity the kernel can prove.
Fixes, all in the agent collector:
- Union discovery: the kernel block device list (/sys/block, lsblk fallback)
is the ground truth for which disks exist; smartctl --scan-open only
contributes device-type hints. Any physical disk the scan misses gets an
untyped probe target.
- Untyped retry: a typed Linux probe that errors, yields no usable data, or
fails to open (exit bit 2, distinct from -n standby,3's exit 3) retries with
smartctl auto-detection before giving up. Multiplexed controller members
(megaraid, cciss, ...) are exempt since dropping -d would probe the array.
- Identity-only fallback: when every probe fails but the disk exists in
/sys/block with nonzero capacity, report device/model/serial/size with
health UNKNOWN instead of hiding it. No SMART data is fabricated;
multiplexed array paths and zero-capacity media are excluded.
- Exclusion follow-through: --disk-exclude now also matches the canonical
post-refine name (nvme0n1), not just the scan label (nvme0).
Regression tests use smartctl/lsblk fixtures captured from PVE 9.1.9 hosts
and the issue report. Verified live on two PVE nodes: NVMe keyed by
namespace with byte-exact pvesh sizes, SATA disk reported with full identity.
Completes the #1483 fix started in bd20069c6 (namespace devpath, authoritative
sizes, merge downgrade guard). Closes #1483.