The section is dead. What to do?

Question

linux

The bottom line is this - put linux on the same hdd where windows was. Ubuntu automatically created a new partition and I allocated about 300 GB for it. Everything was fine until I saw that the size of the partition did not decrease from Windows (A should have become 1tb - 300 GB). And then I launched a disk check from windows. As a result, the disk is now not opened by anything. The rescan does not start, it also fails to open from Explorer (with a live cd), writes "no access". If you run chdsk manually, it gives "The main file table is damaged. CHKDSK execution aborted." That is, the section with Windows died completely.
Oddly enough, the section with ubuntu is alive and it starts up quietly. But there, too, it is impossible to mount the second partition. Is it possible to somehow revive the partition with Windows? Or at least format it without affecting ubuntu

Answer 1

There are a lot of programs for recovering files from dead/worn partitions. Try a few of them and scan, most likely there will be some files, because. you beat only the partition markup, you did not zero the sectors as such.

Answer 2

Ubuntu automatically created a new partition

It's hard to understand from such a chaotic story what you did there ... but this is not Ubuntu, it was you who created the partitions that way. To understand, do from Linux:
It is always possible.
But the structure of the existing partitions left on the disk depends on a). what kind of Windows did you have and b). how it was set (by default or when manually splitting).
Run gparted and take a look.

Answer 3

My gut feels that there is something related to the type of file system - Ubuntu made itself a partition of the type that is crammed into the default settings (most likely ext3), and at the same time confused Windu, which does not understand ext3.
It is necessary to launch any partition manager (Acronis DD, Paragon HDM, etc.) from any LiveCD/LiveUSB recovery tool and look carefully at the resulting partitions and their properties. If the Windows partition has become incomprehensible to Windows, convert it back to FAT32 or NTFS.