2 Drive Dual Boot Fails

[rogerh]

Here is the listing....

 

Disk /dev/hda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x7bac7bac

  Device Boot	  Start		 End	  Blocks   Id  System
/dev/hda1   *		   1		 764	 6136798+  83  Linux
/dev/hda2			 765	   19457   150151522+   5  Extended
/dev/hda5			 765		 904	 1124518+  82  Linux swap / Solaris
/dev/hda6			 905	   19457   149026941   83  Linux

Disk /dev/hdb: 10.2 GB, 10262568960 bytes
255 heads, 63 sectors/track, 1247 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xa83953aa

  Device Boot	  Start		 End	  Blocks   Id  System
/dev/hdb1   *		   1		1246	10008463+   7  HPFS/NTFS

Disk /dev/sda: 256 MB, 256901120 bytes
16 heads, 32 sectors/track, 980 cylinders
Units = cylinders of 512 * 512 = 262144 bytes
Disk identifier: 0x4e2e1869

  Device Boot	  Start		 End	  Blocks   Id  System
/dev/sda1   *		   1		 980	  250864	e  W95 FAT16 (LBA)

 

Hopefully this points out what is wrong. My preference would be to keep my windows drive as is, since when my linux disk crashed last month I did have access to a backup (yup, probably would be ok even if grub was on the front end.....).

 

Thanks for the persistent help!!

 

Regards -- Roger

[ianw1974]

OK, so you can see both your disks no problem. I think your grub config is in the wrong order though for Windows. Put it like this:

 

map (hd0) (hd1)
map (hd1) (hd0)
rootnoverify (hd0,0)
makeactive
chainloader +1

 

and see if it boots now.

[rogerh]

Hello,

 

Made that change, and now on boot I get 'Error 13 : invalid or unsupported executable format'

 

This is the relevant chunk of script in menu.lst

 

title windows

map (hd0) (hd1)

map (hd1) (hd0)

rootnoverify (hd0,0)

makeactive

chainloader +1

 

 

Regards -- Roger

[ianw1974]

OK, try changing the rootnoverify line like this, and see what happens:

 

rootnoverify (hd1,0)

 

and try again.

[rogerh]

Hello,

 

Now I get an 'Error 21 : selected disk does not exist' What should I change now?? This seems to be a bit of an elusive guy!! Thanks for your persistence....

 

Regards -- Roger

[ianw1974]

I'm unsure, when I googled all that stuff, I got the suggestions I made and unfortunately, it didn't seem to work as it did for all the others who asked the same question for the error posted.

[rogerh]

I was wondering if there is a difference between the hd0 / hd1 and hda / hdb designation?? The disk listing I pasted above uses the hda/hdb designations, while the grub commands use hd0 and hd1. Not sure if that makes any difference??

 

Any other resources I can poke at to try and get this resolved?? I have started to look at the on-line grub documentation, but I think it may be beyond me at the moment..

 

Regards -- Roger