|
| 1. Do not store
important files in the root directory. |
Files,
which are stored in the root directory, are sensitive to a loss by quick
formatting, because file entries are set-aside in the root.
Avoid to store files directly in the root since the file
disappears, if the directory entry is damaged. In an emergency, one can
retrieve and recover data very quickly if it is in a sub-directory. |
|
2. Defragment the hard drive regularly |
| Data is stored in
successive clusters, if sufficient connected free storage location is
available. Repeated deletion and write operations fragment the drive. |
|
An example: |
|
(1) (2) (3) (4) (5)
(6) (7) (8) - should represent 8 small files
(1) (2) (3) (4)
(5) (6) (7) (8) - now files (2), (4), (7) and
(8) were deleted
(1) (9) (3) (9) (5) (6) (9) (9) - disk
is fragmented if a larger file is stored |
| If data is deleted from the
hard disk, new data can take the free place. If the new data is larger
than the old one however, the data is net set aside in coherent range, but in
fragments. |
| When reading fragmented data the head of the hard disk has to 'jump' (i.e. the head
moves to the looked track). Thus the reading and write speed is reduced. |
| In order to make the read and write procedure again more efficient, it is necesscary to reorganize the fragmented
hard drive. After defragmentation, the data is in
sequential order and then look in such a way: |
|
(1)
(9) (9) (9) (9) (3) (5) (6) - after the disk is defragmented |
| A
usually fragmented hard disk will degree the efficiency of a data-rescue, if
e.g. the FAT is overwritten by a quick format or a virus. Then it is
necessary to analyse exactly, how a file scattered over the disk lies. If
however connected data is present, a data-rescue is very quickly possible
on the basis of the information about its position and size. |
Important:
A non-fragmented hard disk will increase you rate of data retrieval and recovery because the complete data is stored at the beginning of the first cluster of a file. |
|
3. Do not store important data on a hard drive with small capacity |
| The probability of
the recover is lower, the smaller the disk capacity is. Important data
should be saved on a free drive. The smaller the capacity is, the higher
the risk of fragmentation is. |
|
4. Defragment your floppy disk, after data is stored on it |
| Disks are fragmented with
very high probability. Therefore it is advisable with important data, to distribute the files into several directories and then defragment the
floppy disk. |
|
5. Do not use a hard disk, which you require to the data-rescue. |
Do not install
recovery software on a disk that contains data for retrieval or data-rescue.
Otherwise data could be overwritten and success on a data rescue can be
hard. Avoid working with the hard drive and do not save any data on it. Do
not use a usal program, including the Windows(R) Explorer, in order not to
overwrite important deleted data.
For the data recovery you should use a second hard disk. |
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