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JetAce44
Apprentice
Joined: 02 Feb 2004
Posts: 152
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 Posted: Sat Aug 07, 2004 2:50 am Post subject: Grub/MBR Problem |
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Not really an install question, but has to deal with part of it.
I've had a running gentoo system for about 6 months now, finally got everything running the way I wanted etc etc.
In an attempt to make my box quiet(er), I purchased a bunch of fans and cooling equipment. Long story short, I somehow corrupted the MBR while taking out my main OS drive. I honestly have no idea how that happened.
At first, I freaked. I figured somehow I corrupted the entire disk, messed up the IDE connector or some physical harm done to the drive.
Luckily I have a speedy connection, and was able to grab a knoppix iso. Mounted my OS drive perfectly. I can see my windows, boot, and root partitions perfectly (*huge sigh of relief*)
Anyway, what can I do to repair my MBR so that grub is back in order? My grub.conf and all the necessary files are still in the boot partition.
I'm still a little myphed about what exactly happened, but at least my data is there (I'll be sure to run a thorough fsck).
Any suggestions?
Mods, if this is in the wrong place, please move. I figured this was the closest place where my topic fit into.
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Tyan Tiger MPX 2466
2x AMD Athlon MP 1800+
1gig Crucial PC2100 ECC
NV 6600GT
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4x 2000JD WD 200gig 8mb Cache Sata Drive (Under RAID 5 on a 3ware 8506-4LP)
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freelight
Apprentice
Joined: 12 Jun 2004
Posts: 295
Location: NYC, NY, USA
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| Posted: Sat Aug 07, 2004 2:53 am Post subject: |
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You can simply do:
| Code: | | grub-install /dev/hda |
(assuming hda is the harddrive in question) |
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JetAce44
Apprentice
Joined: 02 Feb 2004
Posts: 152
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| Posted: Sat Aug 07, 2004 3:00 am Post subject: |
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| freelight wrote: | You can simply do:
| Code: | | grub-install /dev/hda |
(assuming hda is the harddrive in question) |
No kidding, its really that easy? Knoppix has grub-install built in?
_________________
Tyan Tiger MPX 2466
2x AMD Athlon MP 1800+
1gig Crucial PC2100 ECC
NV 6600GT
1x 1000JB WD 100gig 8mb Cache IDE Drive
4x 2000JD WD 200gig 8mb Cache Sata Drive (Under RAID 5 on a 3ware 8506-4LP)
Registered Linux User #346685 |
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nzpilgrim
n00b
Joined: 03 Oct 2003
Posts: 13
Location: Wellington, New Zealand
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| Posted: Sat Aug 07, 2004 3:23 am Post subject: |
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pray pardon my ignorance, but wouldn't loading a livecd, popping into the shell, then running
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# grub
grub > setup (hd0)
grub > quit
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do the trick?
Just follow the appropriate part of the installation instructions again about installing grub (you only need to do the pertinent bits - that is, where grub gets put into the MBR) and you should be away laughing...
Anyone else feel free to correct me. 
All the best with your problem...
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Cheers,
Ashley R. Clarkson (NZPilgrim). |
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freelight
Apprentice
Joined: 12 Jun 2004
Posts: 295
Location: NYC, NY, USA
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| Posted: Sat Aug 07, 2004 3:24 am Post subject: |
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grub-install is a part of grub, as far as I'm aware. If grub-install doesn't work, do it the old-fashioned way:
| Code: | grub
root (hd0,0)
setup (hd0)
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This assumes that your /boot partition is /dev/hda1 |
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JetAce44
Apprentice
Joined: 02 Feb 2004
Posts: 152
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| Posted: Sat Aug 07, 2004 3:33 am Post subject: |
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| freelight wrote: | grub-install is a part of grub, as far as I'm aware. If grub-install doesn't work, do it the old-fashioned way:
| Code: | grub
root (hd0,0)
setup (hd0)
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This assumes that your /boot partition is /dev/hda1 |
Hrm, something fishy is going on here. Everything worked fine under knoppix, didnt complain about any write errors, but I'm still getting the damn 'Operating System Not Found' error.
Gonna try a gentoo livecd next.
/edit: I figured I'm too tired atm to risk anything further, I'll do a sitrep tomorrow when I'm actually coherent. Tried running grub again, still to no avail. Odd thing is the windows xp install disk that I have doesnt work, so I cant even do a checkdisk....
You think backing up my grub.conf and then wiping the boot partition would do any good?
_________________
Tyan Tiger MPX 2466
2x AMD Athlon MP 1800+
1gig Crucial PC2100 ECC
NV 6600GT
1x 1000JB WD 100gig 8mb Cache IDE Drive
4x 2000JD WD 200gig 8mb Cache Sata Drive (Under RAID 5 on a 3ware 8506-4LP)
Registered Linux User #346685 |
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Installing Gentoo
