Disk-to-disk backup
The term "disk-to-disk", or "D2D", generally refers to disk-to-disk backup. With D2D, a computer hard disk is backed up to another hard disk rather than to a tape or floppy. D2D is often confused with virtual tape, but differs in that it enables multiple backup and recovery operations to simultaneously access the disk directly by using a true file system.[1]
Typical advantages of disk-to-disk
- Higher speed and higher capacity, relative to tape or floppy, resulting in shorter backup and recovery windows.
- Non-linear recovery of data, enabling a specific file to be restored quicker and simpler than with tape.
- Lower total cost of ownership due to increased automation and lower hardware costs.
Remote backup services
Remote backup services are closely related to D2D backup as they are most often stored remotely on disk. The only major difference is that the data tends to be held at a remote location and these services are often provided by Managed backup photos provi
ders.
gollark: To clarify, do you mean how fast you can type/read/whatever or more general stuff?
gollark: Not that I'm some sort of engineered superhuman, but still.
gollark: I generally don't find myself running at anywhere near my maximum I/O data rate.
gollark: I have heard it said that Google and such aren't that efficiently run, but just have money-printers operating somewhere.
gollark: GPUs can go up to many tens of TFLOP/s but only have a few tens of gigabytes of memory, which is 3 OOM off.
References
- Preston, W. Curtis (2006). Backup and recovery (2 ed.). O'Reilly Media. pp. 219. ISBN 0-596-10246-1.
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