V článku autor píše aj čo-to o princípoch fungovania, metódach opravy a dôvodoch smrti pevných diskov.
Z iného zdroja pridám ešte dve utility na obnovu dát z disku ktorý sa nevie pripojiť v BIOSe: ddrescue
GNU ddrescue is a data recovery tool. It copies data from one file or block device (hard disc, cdrom, etc) to another, trying hard to rescue data in case of read errors.
Ddrescue does not truncate the output file if not asked to. So, every time you run it on the same output file, it tries to fill in the gaps.
The basic operation of ddrescue is fully automatic. That is, you don't have to wait for an error, stop the program, read the log, run it in reverse mode, etc.
If you use the logfile feature of ddrescue, the data is rescued very efficiently (only the needed blocks are read). Also you can interrupt the rescue at any time and resume it later at the same point.
Automatic merging of backups: If you have two or more damaged copies of a file, cdrom, etc, and run ddrescue on all of them, one at a time, with the same output file, you will probably obtain a complete and error-free file. This is so because the probability of having damaged areas at the same places on different input files is very low. Using the logfile, only the needed blocks are read from the second and successive copies.
The logfile is periodically saved to disc. So in case of a crash you can resume the rescue with little recopying.
Also, the same logfile can be used for multiple commands that copy different areas of the file, and for multiple recovery attempts over different subsets.
a hddread.
Nejprve je třeba zjistit, zda disk vidí BIOS či pokud je viděn ve struktuře proc (např. /proc/ide/hdb). Pokud ano, zkusíme disk připojit. Pokud se to nepodaří, je na řadě program pro získání čitelných dat. Tato operace se provádí bez připojení disku a data se čtou raw formou po sektorech. Lze využít příkaz dd, ale ten se často snaží číst "dopředu" i když se ho o to nikdo neprosí a celková doba čtení dat trvá v případě nečitelnosti disku déle. V tomto případě je nejlepší použít program Rudolfa Marka hddread.c
Žiadne komentáre:
Zverejnenie komentára