R2/T4 (2026-10-02 10:55 MSK): read-only eMMC snapshot — NOT EXECUTED on the board (no command channel).
- CH340 TX -> board RX disconnected => no UART shell input.
- Board RAM-Linux has no shell/listener over NCM; nc listeners are only ever started via UART.
- Host NCM iface enp60s0u1u2u1 has no 172.16.42.2 (sudo needs password); 172.16.42.1 and ff02::1 don't answer.
- Board's aurora-modem logged "usb0 ping lost" at 10:42:20 (same cause: host has no IPv4 on NCM) -> modem rollback (unrelated to R2).
Partial T4(b) from existing UART log logs/uart/r2t3c-20261002-102255.log (C1–C6 boots, on 480s):
- each boot: "mmc0: new HS200 MMC card at address 0001", H4G2a 3.64 GiB, "Card appears overclocked; req 177770000 Hz, actual 177777777 Hz" (benign rounding).
- 0 mmc/sdhci error, timeout, CRC, or re-tuning lines in the kernel console during C1–C6 (boot + ~5–20 s runtime only).
Not obtained: pre_eol_info, life_time, EXT_CSD[162], err_stats.