Work disk
Differential backup
Incremental backup
Full backup
(all data)
Full backup
(all data)
Changes since
full backup
Changes since
backup
Changes since
full backup
Changes since
backup
Monday
Change
Tuesday
Change
Wednesday
Failure
Restore from full backup
and last differential backup
Restore from full backup ,
and incremental backups
and in sequence
Recovery
(3)Backup methods
Important files are saved to a separate drive or backup media. In addition,
backing up the entire C: drive allows for quick recovery of files in the
event of an emergency such as damage to the hard disk.
Reference
Generation management
“Generation management” refers to the
process of storing several generations
of backup data from the past. Backup
data is needed when re covering data,
but if it is accidentally overwritten, older
data may become necessary. In such
an event, generation management is
useful.
Reference
Backups that use DAT
“DAT” is a type of magnetic tape that is
suited for backing up entire hard disks.
Instead of individual files, whole disks
are backed up.
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Method
Description
Copy files and folders
Create backups by dragging and dropping each file or folder, or by copying and pasting.
Utilize backup tool
Create backups by using specialized application software.
(4)Backup media
Backup media is selected according to the volume of backup files or their
application.
Examples of media formats that can be used for backup include hard disks,
MO, CD-R, CD-RW, DVD-R, DVD-RW, and DAT.