While hard drive cases and "beauty" treatments may be very different, the workings and design of operation is identical. This ensures that any brand of drive similar to what was original will be compatible. Whether it be the ATA, SATA or SCSI family, the arrangement for data storage is identical, as well as the search and control mechanisms. While 'ancient' MFM hard drives used a stepper servo to access tracks, newer designs use a variable reluctance search method.. counting tracks instead of "steps".
The only major differences are the number of platters, the quantity of tracks and sectors per track. Capacity has gone tenfold over early hard drive models.. but the basics are the same. What used to be 12~17 SPT (sectors per track) now is beyond 56 SPT. And cylinder count has gone from perhaps 400 to well beyond 12,000! But the data storage per sector is still 512 bytes.
Whether it be a Hitachi, Seagate, Maxtor, Toshiba or other brand of drive.. any diagnostics program should work equally well. Only with the "in-house" variety would there be somewhat different procedures.
One major problem with any hard drive is the loss of sufficient power to spin up the drive servo. If less than +12 volts is available to that servo (only +5 volts for laptop drives), then the platters may not have enough torque to overcome head resistance.. or the spindle bearings have become "sticky". No spin-up, no ID to the POST inquiry. And "no bootable media found" error message. If the MBR (master boot record) is fouled, then the path to the OS files is not true.. and other error messages result. Doing a 'repair' process to the MBR may be all that is needed, in some cases.
F@H.. to solve mankind's maladies.. in our lifetimes!