Partition Recovery - Boot Sector Is Bad
Posted: 13 Jun 2021, 20:15
Hiya all,
I have a one TB external disk connected via USB. This disk is used for a backup data partition (primary). Yesterday I set up a second primary partition (bootable) and tried to copy an image onto it. The process crashed somehow damaging the partition table. Afterwards only the second partition was recognized. I used testdisk to search for the lost partition and the search process showed me only the new one. The deeper search however showed me the original partition, the new second primary partition and two entries which seem to be incorrect copies of the original primary one. I kept the original one as P, the second as *, the copies remained D and wrote the new partition table. Originally both BS were shown as status: bad. After having written the PT the backup is status OK, of course.
Now I'm wondering whether I should copy the backup onto the BS, because a rebuild BS results in the message: extrapolated BS and current BS are different, showing a difference in the MFT.
Disk /dev/sdd - 1000GB / 931 GiB - CHS 121601 255 63
Partition Start End Size In Sectors
1 P HPFS - NTFS 0 1 1 52216 254 63 838866042
filesystem size 838866042 1
sectors per cluster 8 0
mft_lcn 786432 0
mftmirr_lcn 52429127 0
clusters_per_mft_record -10 0
clusters_per_index_record 1 0
extrapolated boot sector and current boot sector are different.
What I'm understanding is that the first value in each line describes the current, the second value the backup BS. The second now beeing OK, but with the result that the MFT and all the files on the partition being lost?! What could I do now? Thanks in advance for your help and suggestions. Very much appreciated.
Peregrinus
I have a one TB external disk connected via USB. This disk is used for a backup data partition (primary). Yesterday I set up a second primary partition (bootable) and tried to copy an image onto it. The process crashed somehow damaging the partition table. Afterwards only the second partition was recognized. I used testdisk to search for the lost partition and the search process showed me only the new one. The deeper search however showed me the original partition, the new second primary partition and two entries which seem to be incorrect copies of the original primary one. I kept the original one as P, the second as *, the copies remained D and wrote the new partition table. Originally both BS were shown as status: bad. After having written the PT the backup is status OK, of course.
Now I'm wondering whether I should copy the backup onto the BS, because a rebuild BS results in the message: extrapolated BS and current BS are different, showing a difference in the MFT.
Disk /dev/sdd - 1000GB / 931 GiB - CHS 121601 255 63
Partition Start End Size In Sectors
1 P HPFS - NTFS 0 1 1 52216 254 63 838866042
filesystem size 838866042 1
sectors per cluster 8 0
mft_lcn 786432 0
mftmirr_lcn 52429127 0
clusters_per_mft_record -10 0
clusters_per_index_record 1 0
extrapolated boot sector and current boot sector are different.
What I'm understanding is that the first value in each line describes the current, the second value the backup BS. The second now beeing OK, but with the result that the MFT and all the files on the partition being lost?! What could I do now? Thanks in advance for your help and suggestions. Very much appreciated.
Peregrinus