v0.20.2: delete dead retry block + wedge-family cooldown in Disc::patch

WO-3c: Delete dead non-NOT_READY retry block (~100 LOC). The block
declared retry_count = 0 inside the per-iteration Err arm, so the
'MAX_NON_NOT_READY_RETRIES=3' budget actually fired exactly once
(1s pause + 1 retry) before falling through to NonTrimmed. The
'exponential backoff: 2s, 4s, 8s' comment was wrong by construction.
Cross-pass NonTrimmed retry (each pass gives the same sectors another
shot) already covers the recovery case, and gives the drive minutes
between attempts instead of 1-8 seconds — empirically what stochastic
recovery on the BU40N actually needs.

WO-4 (targeted slice): Add wedge-family cooldown on HARDWARE_ERROR /
ILLEGAL_REQUEST senses. These are what the BU40N's firmware fast-fail
state returns; every subsequent read in that state comes back in
<100ms. Pre-fix patch hammered the drive: mark NonTrimmed, sleep 1s,
advance, hit next wedge, mark, sleep 1s — exactly the rapid-retry
cadence the firmware is sensitive to. Now a wedge-family sense triggers
WEDGE_FAMILY_COOLDOWN_SECS=30 cooldown (matches read_error.rs's
ZONE_ENTRY_COOLDOWN_SECS), and WEDGE_ABORT_THRESHOLD=16 consecutive
wedges aborts the pass for autorip eject+reload. Any non-wedge read
clears the counter.

Also drops the duplicate NonTrimmed dispatch (Mapfile::record is
idempotent so it wasn't a correctness bug, but it doubled per-failure
consumer work).

This commit is contained in:

matthew

2026-05-13 11:53:57 -07:00

parent 6f9e297a9e

commit c9cede3759

2 changed files with 78 additions and 120 deletions

									
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				[package]

				name = "libfreemkv"

				version = "0.20.1"

				version = "0.20.2"

				edition = "2024"

				rust-version = "1.86"

				license = "AGPL-3.0-only"