The first number to the fourth word after WD represents the capacity of this hard disk, and the unit is 100M, which is the same as st, 1600 = 160 g.
Number 5, representing the number of hard disk revolutions and cache capacity:
J- stands for 7200rpm, with 8MB of cache, such as WD800JB, while Dailiang has 7200RPM and high-end caviar with 8M cache.
The sixth digit represents the interface type adopted by Western Digital:
S stands for SATA 300MB/s interface (in the hard disk of Western Digital, some JS products do not represent the current SATA standard, but have a transmission speed of 300MB/s, such as WD 1200JS-00MHB0).
7-8 digits: logo representing OEM customers. If these two digits are numbered 00, it means that the product is facing the retail market. If it is other characters, it is the code of OEM customers, and different numbers correspond to different OEM customers.
9 digits: for hard disk storage, each disk: M- stands for 80G.
10 bit: represents the version number of the same series of hard disks, and the version numbers of different series are different;
H- stands for 7200 rpm, SATA 300 interface, JS series, 8MB cache.
1 1- 12 bits: indicates the firmware version of the hard disk. At present, we are familiar with A0 and B0.