i do all you want me to and i try to reboot and it WORKS.how did you do that?how did you know about all the sector and command,etc?anyway,i would like to thank you for your assist.
#51
Posted 10 May 2013 - 02:06 AM
#52
Posted 11 May 2013 - 07:23 AM
i do all you want me to and i try to reboot and it WORKS.
Good
how did you do that?how did you know about all the sector and command,etc?
Even if it may seem to you like a sort of (black or white ) magic, it is really quite a simple set of diagnosing and fixing procedure, of course if you know how exactly, in detail a PC boots and know the grub4os commands syntax.
When grub4dos is installed, by default (i.e. unless you "force" it to NOT do it) makes a copy of the preexisting MBR on second sector.
Without a precise description of your actions BEFORE you asked for help, I had to check the values in both the "current" MBR (first sector) and of the "backup copy" (second sector).
These were three possibilities:
- Both CODE and DATA in the current MBR were wrong.
- Only CODE in the current MBR were wrong.
- Only DATA in the current MBR were wrong.
Since you got the "Missing operating system" message, which is "normal" for a Windows NT based system if the data is wrong, the CODE was seemingly OK, and then the DATA wrong (#3 above).
By attempting to root to the active partition and chainloading directly the BOOTMGR, we verified it.
Reading the data in both MBR's I could get an idea of the size of hard disks that they were made for, one was for a 320 Gb Hd and one for a roughly 750 Gb one, once you provided the info that your hard disk is a 750 Gb one there were good probabilities that the data in the "backup" were correct, so we had the "backup", and here we had four possibilities:
- Both CODE and DATA in the backup MBR were wrong.
- Only CODE in the backup MBR were wrong.
- Only DATA in the backup MBR were wrong.
- Both CODE and DATA in the backup MBR were right
The simplest way to check was what I told you to do:
backup (on sector 61) "current" MBR and (on sector 62) "backup" MBR, in order to have a "way back" in case of issue.
replace the "current" MBR with the "backup".
After all it was situation #4 above.
anyway,i would like to thank you for your assist.
You are very welcome.
Wonko
#53
Posted 17 November 2013 - 11:49 PM
hi Wonko the Sane,
i think you might be able to help. i hate to cut in on a discussion though. my question is somewhat related but i dont think it is on topic enough to ask in this thread. i wanted to get your attention specifically because i have asked for help in many forums and no one really responds. i was hoping that if i got your attention on this thread maybe you could please help me. let me know and ill start a new topic? ive been tryin to figure this out for over a week now. i really think you might have the answer.....please help.....
#54
Posted 18 November 2013 - 10:49 AM
Sure, by any means, do start a new thread with your issue.hi Wonko the Sane,
i think you might be able to help. i hate to cut in on a discussion though. my question is somewhat related but i dont think it is on topic enough to ask in this thread. i wanted to get your attention specifically because i have asked for help in many forums and no one really responds. i was hoping that if i got your attention on this thread maybe you could please help me. let me know and ill start a new topic? ive been tryin to figure this out for over a week now. i really think you might have the answer.....please help.....
Wonko
#55
Posted 14 October 2017 - 06:18 PM
Well, you need an app capable of accessing the disk.
dsfo/dsfi (part of the dsfok toolkit) though 32 bit should run normally in 64 bit.
Most likely you will need Administrator privileges.
....
Wonko
Wonko, great thanks for the instructions. I messed up with an USB stick and ended with "no grldr" message at boot (Win 7). This was the only real help I could find. Problem solved!
#56
Posted 15 October 2017 - 01:36 PM
Wonko, great thanks for the instructions. I messed up with an USB stick and ended with "no grldr" message at boot (Win 7). This was the only real help I could find. Problem solved!
Only too glad to have contributed to another happy bunny in the basket .
http://www.msfn.org/...#comment-828512
Wonko
Also tagged with one or more of these keywords: grldr, hiren, grub4dos, mbr
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