The best sold types of external drives are those from Western Digital My Passport of 2.5" and My Book of 3.5". In case of mechanical defects, the opening of the hard disk takes place in an adequate Clean Room Class 100. There is a large number of manufacturers of external hdd of 2.5" Western Digital, Seagate, Adata, Verbatim, Samsung, Transcend, Toshiba, Samsung, Apple, Hitachi, HP, Lacie, Lenovo, Prestigio, Silicon Power, Teac, Fujitsu Siemens, Freecom but inside are the same 4 or 5 types of hard disks (Seagate, Western Digital, Toshiba, Samsung, Fujitsu Siemens) of which Western Digital holds more than half the market ratio.įor the recovery of the data from such hard drives we need specialised equipments which allow for the operation of opening up the disks and for the data recovery to take place in conditions of maximum safety. In case of external hard disks of 2.5" (we only refer to the ones charged by memory stick such as the one in this image) the most problems appear also as a consequence of shock or hitting the hard drive.ĭue to the fact that they are very small, they can be carried around in pockets, handbags or bags and therefore the chances of shock are very high. In addition of the mechanical defects there are also cases of electrical defects or firmware defects and these are a relatively low percentage. BIT DATA RECOVERY is the only company in Romania which has the necessary equipment for such operations. In these situations the only possibility is the operation of moving the platters. We have sufficient cases in which as a consequence of the topple over of that hard drive the motor was blocked.
External hard drive recovery series#
Free Agent 3.5" series from Seagate use in the vast majority of cases which are extremely sensitive to shock. In case of SEAGATE 3.5" the most frequent type of defect following a shock is the blocking of the motor. In these cases the chances are extremely variable and depend on the type of drop the hard disk has suffered, if it was working or not at the moment of the drop. In case of Western Digital external hdd it is extremely rare that the motor of the hard disk is blocked. In case of Western Digital it happens most often that following a fall or a shock an uncontrolled movement of the read-write pins occurs, which can lead to the scratching of the platters or the blocking of the reading pins on the surface of the platters.
We will discuss the external hard disks of 3.5" specific to the two brands. These two brands represent approximately 70-80 % of external hard drive sold and therefore 70-80% of them have mechanical problems. The most used types of hard drives are Western Digital and Seagate.