A Samsung mobile hard disk, in the computer operating system can display the hard disk drive letter, but shows a zero byte capacity, double-click the letter was unable to open screen error I / O error message. According to the user to reflect the mobile hard disk is in the absence of a complete loss of power under the hard disk from the desktop USB port non normal pull out again into the notebook computer USB port, the USB interface for data copy found a hard disk failure.
Analysis of the fault has two possible, a virus, a boot type virus can infect mobile hard disk MBR and boot sector, resulting in the original hard disk partition table error capacity cannot be identified, so the display capacity of 0: another not in accordance with the routine first remove hardware to remove the hard disk, resulting in damage to the hard disk circuit, especially bad interface circuit and I / O wrong message.
The possibility of the hardware is large, because it is not normal exit, easy cause interface circuit damage. When you insert a hard drive, the hard drive motor turns the sound normal, and the power indicator light and flash, indicating the normal communication with the motherboard..
Open the hard disk box, careful observation of the interface and the circuit board and found no signs of burnout components, doubt interface conversion circuit is damaged, with office another together the types of circuit board replacement, fault still.
Since it is not a hardware failure, it may be the partition table error, resulting in the operating system can not identify and cause the mobile hard disk partition no capacity. You must re - disk partition or rebuild partition table. I used to boot from CD-ROM tool start system. Run the software partitioning PqmagIC8 under DOS, errors "#104 disk tips, and then run the disk recovery software DISKGEN and found normal mobile hard disk capacity, illustrating the hard disk partition table error, press ALT and t keys to activate the" tool (T) "menu, press up and down arrow to select" rebuild the partition table ". When the "automatic mode" and "interactive mode", the choice of "interactive mode" ". To find the first partition when the original partition is the original partition, if it is the original on the reservation, not to skip. To find the same or similar to the original partition, on the reservation. Until one by one, the original partition to the original so far. After saving exit restart the computer into the WINXP operating system after the discovery of the failure remains, repair into trouble. Helpless, to boot from the CD, "automatic" mode of functional reconstruction of the partition table, save and exit after the restart the system, accidentally discovered capacity hard disk, hard disk of the original data is still.
Experience: DIKGEN function of zonal management in reconstruction of the partition table functions very well, if "interactive mode" function can not restore partition table, select "automatic" function.