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docs: bench back on SD dev; Can't-open-blockdev root cause pinned

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ScottW514
2026-08-08 13:14:50 -04:00
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docs/BRINGUP.md
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@@ -1053,3 +1053,15 @@ go-ahead: deploy both binaries, live re-check, then SRCREV bumps.
/data/forgefirm/archive, dev image still on SD via `ffboot -s`).
Remaining Phase 2 nicety: the installer's embedded pubkey is the
DEV key until the production ceremony.
**Post-test: the bench rests on the SD dev image again** (`ffboot
-s`; slot 1 = factory 2024, slot 2 = ForgeFIRM v0.1.0, archives in
/data/forgefirm/archive). Platform fact pinned by experiment while
chasing a console cosmetic: **busybox mount's auto-type iteration
against an already-mounted ext4 device prints a kernel
"`Can't open blockdev`" for each foreign-type (ext3/ext2) exclusive
claim before the ext4 attempt joins the existing superblock** — the
image's fstab keeps the factory slots mounted under /factory, so
any auto-type probe of a slot triggered it. Cosmetic only; ffboot
and the installer now reuse existing mountpoints from /proc/mounts
and mount fresh targets with explicit `-t ext4` (verified: dmesg
count unchanged across `ffboot -l`).