Thread: Grub2, dual boot, Boot Info script question

i've run boot info script , curious why can boot despite error script reports.

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boot info script 0.60 17 may 2011


============================= boot info summary: ===============================

=> grub2 (v1.97-1.98) installed in mbr of /dev/sda , looks @ sector
1 of same hard drive core.img. core.img @ location ,
looks in partition 1 (,msdos1)/grub.
=> no boot loader installed in mbr of /dev/sdb.
=> grub2 (v1.97-1.98) installed in mbr of /dev/sdc , looks @ sector
1 of same hard drive core.img. core.img @ location ,
looks in partition 1 (,msdos1)/grub.
=> no boot loader installed in mbr of /dev/sdd.

sda1: __________________________________________________ ________________________

file system: ext4
boot sector type: grub2 (v1.97-1.98)
boot sector info: grub2 (v1.97-1.98) installed in boot sector of
sda1 , looks @ sector 273599 of same hard drive
core.img, core.img can not found @
location.
operating system:
boot files: /grub/grub.cfg /boot/grub/grub.cfg /grub/core.img
/boot/grub/core.img

sda2: __________________________________________________ ________________________

file system:
boot sector type: -
boot sector info:
mounting failed: mount: unknown filesystem type ''

sda3: __________________________________________________ ________________________

file system: ntfs
boot sector type: windows vista/7
boot sector info: no errors found in boot parameter block.
operating system: windows 7
boot files: /bootmgr /boot/bcd /windows/system32/winload.exe

sda4: __________________________________________________ ________________________

file system: ext4
boot sector type: -
boot sector info:
operating system:
boot files:

sdb1: __________________________________________________ ________________________

file system: linux_raid_member
boot sector type: -
boot sector info:

sdc1: __________________________________________________ ________________________

file system: linux_raid_member
boot sector type: -
boot sector info:

sdd1: __________________________________________________ ________________________

file system: ext4
boot sector type: -
boot sector info:
operating system:
boot files:

md0: __________________________________________________ _________________________

file system: ext4
boot sector type: -
boot sector info:
operating system: ubuntu 10.10
boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img
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are concerned grub installed partition boot sector of sda1? grub not use install partition , in fact makes difficult install partition if try manually. still seem let install grub2's boot loader anywhere on new install combo box.

mbr (msdos) computers boot bios, mbr, additional code. windows use mbr determine primary partition has boot flag (active partition) , jumps there more code. grub2 not use partition boot sector has additional code after mbr finds grub folders , uses grub files.

grub or bios misreport drive. same drive not same drive. mine says same drive sda, boots correct partition in sdc. have 4 partitions in sda , booting sdc13 obvious same drive not correct.

newer grub 1.99 , latest version of script identify more correctly shows uuid uses find correct boot partition.

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