[haiku-bugs] [Haiku] #6301: DriveSetup writes MBR inconsistent with anyboot image.
- From: "preroll" <trac@xxxxxxxxxxxx>
- Date: Mon, 12 Jul 2010 08:21:58 -0000
#6301: DriveSetup writes MBR inconsistent with anyboot image.
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Reporter: preroll | Owner: stippi
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Applications/DriveSetup | Version: R1/alpha2
Keywords: MBR boot CHS bits | Blocked By:
Has a Patch: 0 | Platform: x86
Blocking: |
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Suspect 'DriveSetup' changes MBR partition entry
(offsets 447,448,449), causing some BIOS's not to boot.
Comparison of MBR partition table (from offset 446..)
-----------------------------------------------
Original IMG (r1alpha2-anyboot image) (boots)
80 FF
FF FF EB FF FF FF 00 20 00 00 00 50 14 00 00 00
-----------------------------------------------
After DriveSetup+Installer (no-boot)
80 00
00 00 EB 00 00 00 40 00 00 00 00 A8 FA 00 00 00
-----------------------------------------------
Original IMG is using "FF FF FF" for CHS data,
while DriveSetup is using "00 00 00".
Re-creation:
Write IMG to USB drive.
Delete 650mb partition
Create and Initalise an active partition to use the whole drive.
Install into created partition (using 'Installer').
Compare the MBRs.
Suggestion:
Use "FF FF FF", as more BIOS types seem to agree with this, or
better still calculate the actual CHS bits.
Possibly Related:
#5980, #5595
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Ticket URL: <http://dev.haiku-os.org/ticket/6301>
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