I have a corrupted partition and upon trying to repair it with
disk utility it gives the error
Invalid BS_jmpBoot in boot block: 000000
Several postings on the internet describe this problem related to a wrong partition type GUID. They mostly look at the problem from the perspective of having a NFS+ partition that eventually gets a wrong GUID.
My problem is different since this partition was/is a bootcamp partition.
$ sudo gdisk -l /dev/disk0 Password: GPT fdisk (gdisk) version 1.0.1 Warning: Devices opened with shared lock will not have their partition table automatically reloaded! Partition table scan: MBR: hybrid BSD: not present APM: not present GPT: present Found valid GPT with hybrid MBR; using GPT. Disk /dev/disk0: 234441648 sectors, 111.8 GiB Logical sector size: 512 bytes Disk identifier (GUID): 55F62258-49D5-4E25-9580-AE6FCEB8D4B5 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 234441614 Partitions will be aligned on 8-sector boundaries Total free space is 56299597 sectors (26.8 GiB) Number Start (sector) End (sector) Size Code Name 1 40 409639 200.0 MiB EF00 EFI System Partition 2 409640 98749479 46.9 GiB AF00 BVMACPRO 3 98749480 100019015 619.9 MiB AB00 Recovery HD 4 156317696 234440703 37.3 GiB 0700 BOOTCAMP