Utterly insane that we expected these to last billions of cycles of the heads being moved back and forth between extremes at 100Hz. Madness, I tell you.
String drive? This, like most motor-actuated hard disks, uses a steel rotary band actuator. It's made of a flat strip of steel cut into two halves which wraps around the capstan on the stepper's output shaft.
The steel rotary band is the standard method of actuation for almost all motor-driven hard disk drives. Very few use gears because they introduce slack into the mechanism and force the motor to turn faster, shortening the useful life of the drive.
@@matthewsvideos8235 None of this is true. Almost all motor actuated IDE drives can be low level formatted, and Seagate even had a tool specifically for formatting these drives, called SGTFMT. Even if that were true, almost all SCSI drives support the LLF command and all ESDI drives require it just as ST-506 and ST-412 interface drives do.
@@TheDiskMaster Generally I do not do a low level format on IDE drives with my 386. I only do it on the worst of the drives as an absolute last resort if the drive is going to end up in the dead bin. Some have been successful. I have a few to try it on, but don't think they will work again.
In theory, it will work with any machine that still includes an IDE controller. The ST-157A is well known for not being very compatible between IDE controllers, but otherwise it should not be difficult at all to make working of drive.
Good ol ST-157A, they're picky about IDE controllers. Only drive to ever electrocute me personally. The ST-125 is easily one of the best 20MB ST-412 interface drives out there, simply due to it's robustness and auto parking.
Наука
Mechanics turning into digits is so exciting!
Utterly insane that we expected these to last billions of cycles of the heads being moved back and forth between extremes at 100Hz. Madness, I tell you.
That is such beautiful example of electro-mechanical precision. Well done
Modern hard drives are so precise changing the torque on a screw can cause problems
@@randomyt666 This drive is so precise that it is operating without it's cover completely open loop (without any feedback or track following at all).
This is from a time when programmers thought about every bit of memory and there was nothing superfluous in programs.
Id say that was the C64 days, by this period you could start leaving more and more junk in easily
I really like string drive mechanisms like that!
String drive? This, like most motor-actuated hard disks, uses a steel rotary band actuator. It's made of a flat strip of steel cut into two halves which wraps around the capstan on the stepper's output shaft.
i like this drive it looks like a guy driving a big bicycle
I can't unsee it now
That actuator arm was jumping around so fast that it was out maneuvering the cameras Max frame rate
That's not unusual for any drive
@@TheDiskMasteryea it has to read sectors
Great video.
great video!!
This is just 3600 rpm ! Think about 7200 rpm ! 🔥🔥🔥
There are plenty of drives out there that have even higher spindle speeds, of 10,000RPM and 15,000RPM!
❤️
عمل جيد
nice work
If you're going to run a drive open, keep the platters vertical. It stops dust landing on them.
I have one of these still in good shape.
Seagate sold an awful lot of them
please more videos
using the ribbon of metal instead of a gear or something is interesting
The steel rotary band is the standard method of actuation for almost all motor-driven hard disk drives. Very few use gears because they introduce slack into the mechanism and force the motor to turn faster, shortening the useful life of the drive.
Forgotten technology =)
Elderly IDE monster. I'm have such. They're almost unkillable. Too many bad sectors? Do a low-level format, and it works again. :)
Can’t low level format an IDE drive. Only MFM and RLL drives.
@@matthewsvideos8235 , I know, it's not a full LLF, but such named feature from 386 BIOS works and helps.
@@matthewsvideos8235 None of this is true. Almost all motor actuated IDE drives can be low level formatted, and Seagate even had a tool specifically for formatting these drives, called SGTFMT.
Even if that were true, almost all SCSI drives support the LLF command and all ESDI drives require it just as ST-506 and ST-412 interface drives do.
@@atauenisIt is a full LLF and it does exactly what it says on the tin.
@@TheDiskMaster Generally I do not do a low level format on IDE drives with my 386. I only do it on the worst of the drives as an absolute last resort if the drive is going to end up in the dead bin. Some have been successful. I have a few to try it on, but don't think they will work again.
What is the program you used?
The first program shown is a benchmarking utility called SpeedSys.
i had a old seagate 10MB mfm drive and it's controller.....dunno if it still works as the controller is isa based
It probably works already or can be revived. 10MB drives would most likely be one of the following:
ST-412 ST-212 ST-213
i just confused how hard drives back then can be working with no covers?
You're not supposed to, dust can get in there and crash the heads. This one was already damaged beyond repair.
Significantly wider tolerances allow them to operate for some time without a cover in clean environments.
@@computerguy096 What is the damage?
ooh how did you this is much old
In theory, it will work with any machine that still includes an IDE controller. The ST-157A is well known for not being very compatible between IDE controllers, but otherwise it should not be difficult at all to make working of drive.
Good ol ST-157A, they're picky about IDE controllers. Only drive to ever electrocute me personally. The ST-125 is easily one of the best 20MB ST-412 interface drives out there, simply due to it's robustness and auto parking.
How big is this thing anyway?
It is a 3.5" HH drive, as in, the chassis measures around 3.75x5.5x1 inch. If you're talking about data storage capacity, 42MB.
40 MB MFM? FLASHBACK
This is an IDE disk drive.
All modern HDDs still operate the same way 😍🔝
not really they use voice coils
@@rickastley2520came here to say this. Same principle, different actuator
Witchcraft
это че мастурбирует