> > I'm able to reproduce this kind of behaviour on an ASUS M2N-SLI
> > mainboard when trying to boot from an external USB DVD writer
> > device. In my case the Solaris GRUB optical boot media is readable
> > just fine; It's the BIOS that starts reporting read errors for reads from
> > the USB optical device, at the point when the /boot/grub/menu.lst file
> > should be read. With a few hacks added to the GRUB boot code I'm
> > able to work around that BIOS bug...
>
> Have you tried feeding that code back into Sun as a
> contribution? I.e., I'm hitting the same problem
> right now. Not a corrupted disk, but an inablility to
> read from an external USB drive.
No, not yet.
Here are my notes and the fix that I've used:
=====================================================
- snv_50 installation dvd
- ASUS M2N-SLI deluxe mainboard
BIOS Version:
Vendor: Phoenix Technologies, LTD
Version String: ASUS M2N-SLI DELUXE ACPI BIOS Revision 0202
Release Date: 05/15/2006
- ATAPI DVD Writer device, in an external USB2.0 enclosure
Vendor: HL-DT-ST Product: DVDRAM GSA-4082B Revision: A201
- USB DVD selected as boot device in the "F8" boot menu
snv_50 starts loading GRUB from the USB DVD device, but
fails the open of the /boot/grub/menu.lst file on the
USB DVD, and enters GRUB command line mode.
Any attempt to read files from the USB DVD (e.g. cat /<TAB>)
fails with "Error 25: Disk read error".
========================================================================
Real mode INT13 calls, traced (with a slighly modified) QEMU.
These traces show that Solaris GRUB 0.95 is the only one
that uses an INT13 function 0x41 installation check with the
bios 0xe0 device (el-torito cdrom boot device).
In addition, Solaris GRUB 0.95 is the only one that resets the
system system with an int13, function 0.
int 13, Solaris grub booting from cd:
=====================================
R 250: v=13 e=0000 i=1 cpl=0 IP=0000:7ce9 SP=0000:1fd8 AX=426e DX=00e0
extended read
R 252: v=13 e=0000 i=1 cpl=0 IP=0000:7ce9 SP=0000:1fd8 AX=4200 DX=00e0
extended read
R 254: v=13 e=0000 i=1 cpl=0 IP=0000:7ce9 SP=0000:1fd8 AX=4200 DX=00e0
extended read
R 256: v=13 e=0000 i=1 cpl=0 IP=0000:7ce9 SP=0000:1fd8 AX=4200 DX=00e0
extended read
R 260: v=13 e=0000 i=1 cpl=0 IP=0000:8292 SP=0000:1ff0 AX=0000 DX=00e0 reset
disk system
R 269: v=13 e=0000 i=1 cpl=0 IP=0000:8967 SP=0000:1ff4 AX=4100 DX=0080
installation check (HDD)
R 270: v=13 e=0000 i=1 cpl=0 IP=0000:899b SP=0000:1ff4 AX=0800 DX=0080 get
drive param (HDD)
R 277: v=13 e=0000 i=1 cpl=0 IP=0000:8967 SP=0000:1ff4 AX=4100 DX=00e0
installation check <<<<
R 278: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4b01 DX=7fe0 cdrom,
get status
R 279: v=13 e=0000 i=1 cpl=0 IP=0000:8967 SP=0000:1ff4 AX=4100 DX=00e0
installation check <<<<
R 280: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4b01 DX=7ce0 cdrom,
get status
R 281: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=00e0
extended read
R 282: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=00e0
extended read
R 283: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=02e0
extended read
R 284: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=8ee0
extended read
R 285: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=ade0
extended read
R 286: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=02e0
extended read
R 287: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=8ee0
extended read
R 288: v=13 e=0000 i=1 cpl=0 IP=0000:88e9 SP=0000:1ff4 AX=4200 DX=ade0
extended read
int 13, w2k booting from cd:
============================
R 235: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7be0 AX=4200 DX=00e0
extended read
R 236: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 237: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 238: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 239: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 240: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 241: v=13 e=0000 i=1 cpl=0 IP=2000:001a SP=0000:7bdc AX=0201 DX=0080 read
sector (HDD)
R 242: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bda AX=4200 DX=00e0
extended read
R 243: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 244: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 245: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 246: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 247: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4201 DX=00e0
extended read
R 250: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4201 DX=00e0
extended read
R 251: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4201 DX=00e0
extended read
R 252: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4201 DX=00e0
extended read
R 272: v=13 e=0000 i=1 cpl=0 IP=2000:0f40 SP=22ac:7fe8 AX=4b01 DX=ffe0 cdrom,
get status
R 273: v=13 e=0000 i=1 cpl=0 IP=2000:061f SP=22ac:7fdc AX=0800 DX=0080 get
drive param (HDD)
R 278: v=13 e=0000 i=1 cpl=0 IP=2000:06f3 SP=22ac:7fda AX=4200 DX=00e0
extended read
R 279: v=13 e=0000 i=1 cpl=0 IP=2000:06f3 SP=22ac:7fda AX=4200 DX=00e0
extended read
R 280: v=13 e=0000 i=1 cpl=0 IP=2000:06f3 SP=22ac:7fda AX=4200 DX=00e0
extended read
R 281: v=13 e=0000 i=1 cpl=0 IP=2000:06f3 SP=22ac:7fda AX=4200 DX=00e0
extended read
R 282: v=13 e=0000 i=1 cpl=0 IP=2000:06f3 SP=22ac:7fda AX=4200 DX=00e0
extended read
int 13, win xp booting from cd: (identical, when compared to win2k)
===============================
R 239: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7be0 AX=4200 DX=00e0
extended read
R 242: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 243: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 248: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 251: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 254: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 257: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bd4 AX=4200 DX=00e0
extended read
R 260: v=13 e=0000 i=1 cpl=0 IP=2000:001a SP=0000:7bdc AX=0201 DX=0080 read
sector (HDD)
R 261: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bda AX=4200 DX=00e0
extended read
R 264: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 267: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 270: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 273: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 276: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4200 DX=00e0
extended read
R 279: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4202 DX=00e0
extended read
R 284: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4202 DX=00e0
extended read
R 287: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4202 DX=00e0
extended read
R 292: v=13 e=0000 i=1 cpl=0 IP=07c0:034c SP=0000:7bce AX=4202 DX=00e0
extended read
R 313: v=13 e=0000 i=1 cpl=0 IP=2000:0e2c SP=22f3:7fe8 AX=4b01 DX=ffe0 cdrom,
get status
R 314: v=13 e=0000 i=1 cpl=0 IP=2000:063b SP=22f3:7fdc AX=0800 DX=0080 get
drive param (HDD)
R 319: v=13 e=0000 i=1 cpl=0 IP=2000:070f SP=22f3:7fda AX=4200 DX=00e0
extended read
R 322: v=13 e=0000 i=1 cpl=0 IP=2000:070f SP=22f3:7fda AX=4200 DX=00e0
extended read
...
int 13, knoppix 3.6 booting from cd: (isolinux boot code?)
====================================
R 272: v=13 e=0000 i=1 cpl=0 IP=0000:7ca3 SP=0000:7c00 AX=4b01 DX=00e0 cdrom,
get status
R 273: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bd8 AX=4231 DX=00e0
extended read
R 398: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bd8 AX=4210 DX=00e0
extended read
R 399: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7ba4 AX=421d DX=08e0
extended read
R 400: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bac AX=4221 DX=08e0
extended read
R 401: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7baa AX=4222 DX=08e0
extended read
R 402: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bc4 AX=4235 DX=02e0
extended read
R 403: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7ba4 AX=4222 DX=08e0
extended read
R 404: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bca AX=422f DX=00e0
extended read
R 405: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7ba4 AX=4222 DX=08e0
extended read
R 407: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bc4 AX=422c DX=00e0
extended read
R 410: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7b96 AX=4222 DX=08e0
extended read
R 415: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7b96 AX=42f2 DX=9be0
extended read
R 424: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7b90 AX=42f6 DX=03e0
extended read
R 32865: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7baa AX=4222 DX=08e0
extended read
R 32891: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bcc AX=4237 DX=02e0
extended read
R 32931: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=4247 DX=ffe0
extended read
R 32938: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=4267 DX=ffe0
extended read
R 32947: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=4287 DX=ffe0
extended read
R 32952: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=42a7 DX=ffe0
extended read
R 32959: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=42c7 DX=ffe0
extended read
R 32966: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=42e7 DX=ffe0
extended read
R 32971: v=13 e=0000 i=1 cpl=0 IP=0000:7dd5 SP=0000:7bbc AX=4207 DX=ffe0
extended read
Suggested fix:
==============
- Do not use "int13 installation check" with the el-torito boot device.
- Do not reset the disk system
- Use the CARRY flag returned from int13 to detect errors
diff -ru ../opensolaris-20061030/usr/src/grub/grub-0.95/stage2/asm.S
usr/src/grub/grub-0.95/stage2/asm.S
--- ../opensolaris-20061030/usr/src/grub/grub-0.95/stage2/asm.S 2006-11-02
21:35:31.588023546 +0100
+++ usr/src/grub/grub-0.95/stage2/asm.S 2006-11-05 13:46:17.669873173 +0100
@@ -139,7 +139,7 @@
ADDR32 movb %dl, EXT_C(boot_drive)
/* reset disk system (%ah = 0) */
- int $0x13
+ /* int $0x13 */
#endif
/* transition to protected mode */
@@ -1103,7 +1103,11 @@
movw %bx, %ax
movw %cx, %ds
int $0x13 /* do the operation */
- movb %ah, %dl /* save return value */
+ jnc 1f
+ movb %ah, %dl /* read/write ERROR, save return value */
+ jmp 2f
+1: xorb %dl, %dl /* read/write OK, clear error return */
+2:
/* clear the data segment */
xorw %ax, %ax
movw %ax, %ds
diff -ru ../opensolaris-20061030/usr/src/grub/grub-0.95/stage2/bios.c
usr/src/grub/grub-0.95/stage2/bios.c
--- ../opensolaris-20061030/usr/src/grub/grub-0.95/stage2/bios.c
2006-11-02 21:35:31.589215650 +0100
+++ usr/src/grub/grub-0.95/stage2/bios.c 2006-11-05 14:39:02.134211447
+0100
@@ -189,6 +189,10 @@
* failure here, GRUB will run, but cannot see the boot drive,
* not a very good situation. Defaulting to non-emulation mode
* is a last-ditch effort.
+ *
+ * (XXX: This workaround isn't needed any more, if we avoid calling
+ * the int13_extensions installation check for the el-torito boot
+ * device. See comment in get_diskinfo())
*/
if (drive >= 0x88 && drive == boot_drive)
{
@@ -219,7 +223,43 @@
int version;
unsigned long total_sectors = 0;
- version = check_int13_extensions (drive);
+ /*
+ * If this is the boot_drive, and the drive is an El-Torito
+ * emulated hard disc, avoid calling the int13_extensions
+ * installation check.
+ *
+ * Several BIOS have issues with calling the
+ * int13_extensions installation check for an El-Torito
+ * emulated hard disc:
+ *
+ * o Toshiba Tecra S1
+ * check_int13_extensions() fails and returns 0, but at the
+ * same time, future int13 "bootable cdrom - get status"
+ * (function 0x4b01) calls will start returning failures, too.
+ * (For this reason we have a workaround for the Tecra S1
+ * in get_cdinfo())
+ *
+ * o ASUS M2N-SLI (when booting from an USB CDROM device)
+ * The int13_extensions installation check fails (version == 0);
+ * the int13 "bootable cdrom - get status" is ok.
+ * But reading from the El-Torito emulated hard disc
+ * returns errors as soon as we have called int13_extensions
+ * installation check for the El-Torito CD.
+ *
+ * In both cases, not calling the int13_extensions
+ * installation check for the El-Torito device avoids the
+ * issues.
+ *
+ * It seems that the Windows 2000/XP installation CD doesn't
+ * call int13 function 0x41 (int13 extensions installation
+ * check), so this might explain why BIOS developers don't
+ * notice that their int13 function 0x41 is broken for CDROM
+ * devices.
+ */
+ if (drive >= 0x88 && drive == boot_drive)
+ version = 0;
+ else
+ version = check_int13_extensions (drive);
if (drive >= 0x88 || version)
{
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