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When a partition is deleted, its entry is removed from a table and the data is no longer accessible. The data remains on the disk until it is overwritten. Specialized recovery utilities may be able to locate lost file systems and recreate a partition table which includes entries for these recovered file systems. Some disk utilities may ...
Partition Volume Label, padded with blanks (0x20), e.g., "NO␠NAME␠␠␠␠" Software changing the directory volume label in the file system should also update this entry, but not all software does. The partition volume label is typically displayed in partitioning tools since it is accessible without mounting the volume.
PC-MOS 5.1 depends on this to boot if no partition in the partition table is flagged as bootable. In conjunction with LOADER, Multiuser DOS and REAL/32 boot sectors use this to locate the boot sector of the active partition (or another bootstrap loader like IBMBIO.LDR at a fixed position on disk) if the boot file (LOADER.SYS) could not be found.
TestDisk can perform deeper checks to locate partitions that have been deleted from the partition table. [2] However, it is up to the user to look over the list of possible partitions found by TestDisk and to select those that they wish to recover. After partitions are located, TestDisk can rebuild the partition table and rewrite the MBR. [2]
In most cases, when a file is deleted, the entry in the file system metadata is removed but the actual data is still on the disk. File carving can be used to recover data from a hard disk where the metadata was removed or otherwise damaged.
If the primary partition table has been lost, overwritten or destroyed the partitions still exist on the media but the operating system cannot access them. gpart ignores the primary partition table and scans the disk (or disk image file) sector after sector for several filesystem/partition types.
These boot sectors expect the FDISK partition table scheme to be in use and scans the list of partitions in the MBR's embedded partition table to find the only one that is marked with the active flag. [24] It then loads and runs the volume boot record (VBR) of the active partition.
An extended boot record (EBR), [1] or extended partition boot record (EPBR), [note 1] is a descriptor for a logical partition under the common DOS disk drive partitioning system. In that system, when one (and only one) partition record entry in the master boot record (MBR) is designated an extended partition , then that partition can be ...