Date: Thu, 9 Jul 2009 19:20:03 GMT From: Jeff Kletsky <jeff+freebsd@wagsky.com> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/115406: [patch] gpt(8) GPT MBR hangs award BIOS on boot Message-ID: <200907091920.n69JK3sX029876@freefall.freebsd.org>
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The following reply was made to PR bin/115406; it has been noted by GNATS.
From: Jeff Kletsky <jeff+freebsd@wagsky.com>
To: bug-followup@FreeBSD.org, kent@khauser.net
Cc:
Subject: Re: bin/115406: [patch] gpt(8) GPT MBR hangs award BIOS on boot
Date: Thu, 09 Jul 2009 11:55:01 -0700
Apparently still present in 7.2 -- *may* be the cause of BIOS
"destruction" on Intel D945GCLF2 boards.
From /usr/src/sys/geom/part/g_part_gpt.c
le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC);
table->mbr[DOSPARTOFF + 1] = 0xff; /* shd */
table->mbr[DOSPARTOFF + 2] = 0xff; /* ssect */
table->mbr[DOSPARTOFF + 3] = 0xff; /* scyl */
table->mbr[DOSPARTOFF + 4] = 0xee; /* typ */
table->mbr[DOSPARTOFF + 5] = 0xff; /* ehd */
table->mbr[DOSPARTOFF + 6] = 0xff; /* esect */
table->mbr[DOSPARTOFF + 7] = 0xff; /* ecyl */
le32enc(table->mbr + DOSPARTOFF + 8, 1); /* start */
le32enc(table->mbr + DOSPARTOFF + 12, MIN(last, 0xffffffffLL));
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