how to restore invalid partition table

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how to restore invalid partition table

Postby jozien17 » Sun Mar 24, 2013 7:09 pm

I have a ThinkPad T60 amd am using mepis 12.

Using kde partitionmanager to add a new partition
caused pm to give error message:

"no valid partition table found on this device"

The laptop is working normally, sfdisk -l shows
all my pertitions, cfdisk works etc..

Disk /dev/sda: 60801 cylinders, 255 heads, 63 sectors/track

sfdisk: ERROR: sector 691405470 does not have an msdos signature
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start End #cyls #blocks Id System
/dev/sda1 0+ 5110 5111- 41054076 7 HPFS/NTFS/exFAT
/dev/sda2 5111 6385 1275 10241437+ b W95 FAT32
/dev/sda3 6386 6475 90 722925 6 FAT16
/dev/sda4 * 6476 52534 46059 369968917+ 5 Extended
/dev/sda5 6476+ 6541 66- 530113+ 82 Linux swap / Solaris
/dev/sda6 6542+ 8454 1913- 15366141 83 Linux
/dev/sda7 8455+ 9729 1275- 10241406 83 Linux
/dev/sda8 9730+ 10239 510- 4096543+ 83 Linux
/dev/sda9 10240+ 22988 12749- 102406311 83 Linux
/dev/sda10 22989+ 29363 6375- 51207156 83 Linux
/dev/sda11 29364+ 30766 1403- 11269566 83 Linux
/dev/sda12 30767+ 32104- 1338- 10741760 83 Linux
/dev/sda13 32104+ 33599- 1495- 12005248+ 83 Linux
/dev/sda14 33600+ 37443 3844- 30876898+ 83 Linux
/dev/sda15 37444+ 40055- 2611- 20972544 83 Linux
/dev/sda16 40056+ 41634 1579- 12683286 83 Linux
/dev/sda17 41635+ 43037- 1403- 11264000 83 Linux
root@sda11:/home/jozien#

I checked windows XP and every thjing is normal.

Everything is fine except can't use pm or gparted
to add new partitions.

How can I restore the partition table?

jozien17
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Postby Dutch_Master » Sun Mar 24, 2013 9:06 pm

Your machine probably doesn't use an MSDOS partition table, but GPT instead.... And if it's working, don't mess with it!
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Postby johnhudson » Sun Mar 24, 2013 9:22 pm

Windows does not support GPT on the first hard drive and the layout with the fourth partition as an extended partition is pure MSDOS.

So try parted or gparted and if that fails System Rescue.
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