Как изменить таблицу разделов из gpt в mbr без потери данных?

mint@mint ~ $ sudo gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.5

Caution: invalid backup GPT header, but valid main header; regenerating
backup header from main header.

Caution! After loading partitions, the CRC doesn't check out!
Warning! Main and backup partition tables differ! Use the 'c' and 'e' options
on the recovery & transformation menu to examine the two tables.

Warning! One or more CRCs don't match. You should repair the disk!

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: damaged

Found valid MBR and corrupt GPT. Which do you want to use? (Using the
GPT MAY permit recovery of GPT data.)
 1 - MBR
 2 - GPT
 3 - Create blank GPT

Your answer: 2
Warning! Main partition table overlaps the first partition by 34 blocks!
You will need to delete this partition or resize it in another utility.

Warning! Secondary partition table overlaps the last partition by
4613656342775965362 blocks!
You will need to delete this partition or resize it in another utility.
Disk /dev/sda: 488397168 sectors, 232.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): BCB12C7B-F8DC-4FC5-B3CC-B86F49954327
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 488397134
Partitions will be aligned on 2048-sector boundaries
Total free space is 488397101 sectors (232.9 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name
  17  18376656804508598272  4613656343264362496   2.0 ZiB     FFFF  㜭㘵ⴳㄱ㉥戭㝥ⴲ㡣愰㥡愴昴ㄸ
  19  2089670227104038912  2089670227103142172   8.0 ZiB     FFFF

mint@mint ~ $ sudo gdisk -l /dev/sda
GPT fdisk (gdisk) version 0.8.5

Caution: invalid backup GPT header, but valid main header; regenerating
backup header from main header.

Caution! After loading partitions, the CRC doesn't check out!
Warning! Main and backup partition tables differ! Use the 'c' and 'e' options
on the recovery & transformation menu to examine the two tables.

Warning! One or more CRCs don't match. You should repair the disk!

Partition table scan:
  MBR: MBR only
  BSD: not present
  APM: not present
  GPT: damaged

Found valid MBR and corrupt GPT. Which do you want to use? (Using the
GPT MAY permit recovery of GPT data.)
 1 - MBR
 2 - GPT
 3 - Create blank GPT

Your answer: 1
Disk /dev/sda: 488397168 sectors, 232.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 439E5D94-B40D-4903-8D3D-86FE9A8972A3
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 488397134
Partitions will be aligned on 1-sector boundaries
Total free space is 2044 sectors (1022.0 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              63            2047   992.5 KiB   4200  Windows LDM data
   2            2048          718847   350.0 MiB   4200  Windows LDM data
   3          718848       425480191   202.5 GiB   4200  Windows LDM data
   4       425480192       488395119   30.0 GiB    4200  Windows LDM data