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Date:      Sat, 30 Dec 2017 21:03:17 +0100
From:      Matthias Apitz <guru@unixarea.de>
To:        freebsd-current@freebsd.org
Subject:   panic: invalid bcd 194
Message-ID:  <20171230200317.GA74180@c720-r314251>

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Hello,

I've got an older Acer C720 with r314251, which was not booted for some tim=
e,
and now panics on boot, also in single user mode, saying:

=2E..
Dec 30 19:54:26 c720-r314251 kernel: ada0: Command Queueing enabled
Dec 30 19:54:26 c720-r314251 kernel: ada0: 244198MB (500118192 512 byte sec=
tors)
Dec 30 19:54:26 c720-r314251 kernel: WARNING: WITNESS option enabled, expec=
t reduced performance.
Dec 30 19:54:26 c720-r314251 kernel: Trying to mount root from ufs:/dev/ada=
0p2 [rw,noatime]...
panic: invalid bcd 194
=2E..

The message comes from=20

$ find * -type f -exec fgrep "invalid bcd" {} /dev/null \;
sys/sys/libkern.h:	    ("invalid bcd %d", bcd));

$ vim sys/sys/libkern.h
=2E..
#define LIBKERN_LEN_BCD2BIN     154
#define LIBKERN_LEN_BIN2BCD     100
#define LIBKERN_LEN_HEX2ASCII   36

static inline u_char
bcd2bin(int bcd)
{

        KASSERT(bcd >=3D 0 && bcd < LIBKERN_LEN_BCD2BIN,
            ("invalid bcd %d", bcd));
        return (bcd2bin_data[bcd]);
}

Any idea what could be damaged the system and what to do or check before
re-setup?

Thanks

	matthias

--=20
Matthias Apitz, =E2=9C=89 guru@unixarea.de, =E2=8C=82 http://www.unixarea.d=
e/  =F0=9F=93=B1 +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub

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