is there any design for an

There is not enought information here.

Are SCSI hard disks in the 'any hard drive' ?

At software level..?, interface (ata/scsi/st506/esdi)..? header..?

Define "Any hard disk".

shellac, acetate, non drop frame of course!

martin

A rigid plate.

does "round" come into the spec?

martin

Not when you translate from Norwegian (no s*it)!

Actually, I was thinking about the single 40" 5 MB disc with a three horse, three phase mother that ran the automated Armco Steel mill in Middletown, Ohio for 25 years, from about 1961, till the computer system was replaced and scrapped out in 1986. I ended up with the three phase breaker box and motor controller, along with the warning plate that warned "Do not attempt to read or write to the drive for at least five minutes after power is applied". It took a fork lift to move the drive. the computer system was replaced after the drive could no longer be repaired, and their spars from other companies were all worn out.

i would like it to read SCSI disks also but IDE and SATA would be great

i would like it to be in hardware level if posible but if there is a software solution that can make a tiking hard disk aline again or a burned controler work that would do

what it there to define ? a hard disk with any capacity from any firm

There are two, er three, levels to the connections, physical, electrical, and protocol.

Physical involves the actual connectors, of which there are waay too many-- 50-pin IDC, 40-pin IDC, USB, firewire, 37-pin, 80-pin IDC, fiber, and probably many more.

Electrical concerns the signaling method:: TTL, optical, xxx-ohm flat cable, twisted pair, single-ended, differential, 5-volt swing, 3.3 volt swing, LDVT. Also the data rate-- be it 5, 10, 20, 66, 150, or 266 megabits epr second. Also now parallel or serial.

Protocol concers how the data bits and handshaking is specified-- 8,

So there's scads of variations. USUALLY controller cards can take one or at ost a very few vaiations on a theme. For instance many PC motherboards can accept a variety of IDE drives, 40 or 80 pin, slow to fast. But not anything else. Similarly most SCSI controllers will accept a range of speeds, but not other speeds, and one or two conn3ctor styles, but not the others, and one or two signaling levels, but not others.

so in general, NO.

One exception are the special machins specially designed to test and exercise disk drives, these often accept a much wider variety of disks. Google for "disk drive testers" for more info.

You have a LOT to learn about hard drives.

i want to learn can you please teach me or direct me to somone who can?