Jump to content
BadGoldEagle

Reviving a 512K Hyperdrive - Error Code 0F0100

Recommended Posts

Thanks joe! But that's nowhere near a real professional's job as ole's: He started recreating every single page in Illustrator. Now that's really difficult, I just scan pages and put them together. 

 

So I opened it up, revealing the aftermath of a massive battery leakage...  :'(

post-2677-0-78211100-1477843791_thumb.jpg

 

Thankfully the Hyperdrive logicboard was intact!  ;D

post-2677-0-97825400-1477843835_thumb.jpg

The 512k logic bord looks good too.

 

I detached the "clip". That was rather easy. Looks undamaged. Maybe I'll check continuity to be sure it's fine.

post-2677-0-88366800-1477844051_thumb.jpg

 

Then I removed the hard drive. Turned out to be the exact same unit as JDW's: MMI MM112. 

Ouch ! Drive definitely seen better days! Looks like the impact was so big the gauge literally exploded.

post-2677-0-73847300-1477844328_thumb.jpg

 

I think the drive is shot, as I expected. And, now that I think of it, I couldn't hear the heads moving at all... Maybe there's a way to fix it though?

 

Noticed another thing as I was re-assembling the Hyperdrive system:

post-2677-0-32306900-1477844507_thumb.jpg

Dead cap. Could be the source of many problems. But now it's in half, how can I determine what the capacitance was?? Hyperdrive Logicboard is version 1.1.

 

Side note: I noticed when I was moving the unit around that something was rattling in there. Turned out to be the fan, which fell off from its support and was completely loose: solder joints had broken off as well!

 

 

-- 

I'll try to attend this Cap problem before attempting anything on the hard drive.

Share this post


Link to post
Share on other sites

Wow, I was hoping the battery damage would have been isolated to the holder plastics and terminals.  Shoot.  Luckily, it looks like the frame sustained most of the damage, although I can't see the A/B.  It can be treated and lightly sanded and polished to like-new.  I did the same on a Classic II frame.  I would assume the capacitors in the general area are of the same values.  I can't quite tell from the picture, but it looks like C21 has some values printed on it?  Perhaps use a loupe and see if you can make them out?  I had an SE/30 network card that had a bad capacitor and I couldn't read the values on, so I used the values from a visually identical part on the board.  It fixed it.

 

I'm not familiar with the HyperCard system, is that clip the only thing needed to install it?

Share this post


Link to post
Share on other sites

The Analog board is working fine. The mac "works" as a standard 512k, but the Hyperdrive doesn't. The upgrade consists of a daughterboard, a fan, an additional psu and a hard drive, of course. I think the Hyperdrive PSU is okay, as the HD spins, but I'll double check the voltages right at the molex plug, just to be sure.

 

Yeah I think those caps around C20 are the same as well, I just don't wanna make a silly mistake ordering the wrong capacitor. I don't know if it was already broken when I removed the board, or if I broke it while removing it... Maybe it's what's causing the error code? I doubt it. But who knows. 

Share this post


Link to post
Share on other sites

0.1uf cap. 

 

That cap was physically damaged by impact. You can use any MFM-Style HDD in place of the original if its bad, but you WILL need the hyperdrive utility to LLF the drive. 

 

The heads on those old drives are notoriously bad at keeping their existing alignment, so an LLF may bring that drive back good again. MAYBE. 

Edited by techknight

Share this post


Link to post
Share on other sites

Thanks techknight !

I'm gonna have a look at it later today. Again, just to be sure. But if I can't find anything, which one should I buy? There's quite a lot of 0.1uf caps available from digikey!

From 50volts to 1kV! I think a 50v one will do fine...

 

I'd like to keep this thing as close to original as possible, so i'd rather buy an old MFM drive rather than an emulator, even though the chances of it working are not that good. I stumbled across this yesterday evening: http://www.mfarris.com/hard/mmi.html

Do you think this could work? I know this is not really ethical, but I like keeping the original owner's stuff on an old hard drive like this one. Plus I already told the seller I would send him the documents on the hard drive once I get it working...

Share this post


Link to post
Share on other sites

it would be very surprising if they still have MFM drives in stock, Although not too surprising though as I have seen some industrial machines that are in every day use that still run on old hardware that use MFM drives... 

 

Anyways. That board will run fine without that capacitor in place, although its meant for decoupling VCC/ground bounce from the IC power rails itself. 

 

Also, you need to see if you can boot the machine with the hyperdrive kit installed, and use the hyperdrive disks to low level format the drive and see if it works. It may, it may not. 

Edited by techknight

Share this post


Link to post
Share on other sites

Okay so I opened the thing up, again. This time I got the hang of it. Took me about 2 minutes. (it's difficult to unhook everything because it's so cramped inside!)
They used the same capacitor on the entire Hyperdrive logic board. It's a K5U 104M. That stands for 5volts, and the tolerance is 104M. Apparently you were right (as usual). It's a 0.1uF. It's 5V. +-20%. But I can't find any of these on either digikey or mouser... 

Is it bad if I use one with a higher voltage?

 

So it will work even without this cap? I'm going to power it up now, and see how that drive behaves.

 

I sent the company in question an email. They do repairs on old MFM drives, I was thinking they "might" just fix this one...

Share this post


Link to post
Share on other sites

I tried booting it up with olepigeon's disks (V2R1). The Mac works just like a normal 512k. So that's something at least.

 

Here are some pictures of what happens if I try to run Hyperdrive Install and the Manager. (sorry for the poor quality pics, damn refresh rate!)

post-2677-0-46128600-1477952001_thumb.jpg    post-2677-0-63423600-1477952014_thumb.jpg

HyperInstall V2R1                                                                                                          Manager V2R1

 

I don't know what the "hyperdrive driver" is. But it's probably a system file that is supposed to live on the hard disk, right? Because it says in the manual that Manager should be on a Hyperdrive drawer in order to be used. But there are no Hyperdrive drawers available...

At least it can see the Hyperdrive board! 

 

 

When I performed these tests, the rear bucket was off. The hyperdrive LED is always lit. It's not supposed to do that. It's supposed to blink every now and then as the disk is accessed like a normal Hard drive LED should.

 

What I'd really like to know is what happens past the Hyperdrive ressource installer screen. Is the software looking for something else after checking the Drawers version? Maybe the Hyperdrive driver? If so where is it? Hard drive? ROM on Hyperdrive board?

Only someone with a working Hyperdrive can tell me this. So would you be kind enough to run HyperInstall on your machine? HyperInstall is located inside the Startup Drawer. If not, it must be somewhere on the disk. It won't hurt your machine or install anything on top of your existing system.

THANKS!

Share this post


Link to post
Share on other sites

OK. Did some more tests today. 

First I fired it up using one of the Hyperdrive V3R1 disks. Manager said there was a problem with the hard drive.

post-2677-0-90037500-1478038831_thumb.jpg

 

But this time, V3R1 gave me the choice either to quit OR format the drive.

So I went ahead and formatted the drive, knowing that it would be kinda difficult, since the heads don't seem to move. post-2677-0-50084400-1478038847_thumb.jpg

 

It began formatting the drive. It took Manager about 2 minutes to format all those 305 cylinders, only to tell me that this had failed. I repeated the operation a couple of times, hoping that the heads would unjam at some point. But it did the same thing, over and over again.

 

At this point, I rebooted the mac. But I noticed it wouldn't try to boot from the hard disk anymore. So the 0F0100 error is gone. So it must mean it formatted the drive somehow, without moving the heads. Definitely odd.

 

Then I tried HyperInstall, V3R1. Same thing, it can't find the Hyperdrive Driver. But now I know that's normal since this driver is supposed to be on the Startup drawer, which is gone.

 

I was about to give up, but at the last minute I noticed tanaquil uploaded Hyperdrive System V1 disk 2. (sadly disk 1 is unreadable). But Disk 2 contains Manager V1. And I must say Manager V1 seems to be a lot more advanced than the versions that superseded it. 

 

After re-formatting the hard drive once more, it gave me this message. Ouch, that's a lot of bad sectors!

post-2677-0-26649900-1478039717_thumb.jpg

 

But I have finally come to the conclusion that the hard drive is completely shot. I'm currently looking for a replacement drive. Maybe I'll find another MMI 112? Who knows. I know buying the emulator won't be as troublesome, but I like the noise of big hard drives. I don't mind having a SCSI2SD inside my Mac SE or Portable as these are not as rare as the Hyperdrive.

 

Edit: techknight, apparently the utility in question is the Hyperdrive Manager. 

 

Edit 2: can you replace the front faceplate on MFM drives?

Edited by BadGoldEagle

Share this post


Link to post
Share on other sites

You can use any MFM-Style HDD in place of the original if its bad, but you WILL need the hyperdrive utility to LLF the drive. 

So even if it's got like three times as many cylinders, it's ok? 

There is a working ST-251 for sale right now on leboncoin (french equivalent to craigslist) for about $70. That looks like a good deal, considering that most drives I see on ebay go for about $50 and are untested.

The ST-251-1 has 820 cylinders, it's a 40mb drive. There is no reason why it won't work. I mean, Hyperdrive themselves say the only difference between the Hyperdrive 10 and the Hyperdrive 20 is the drive itself. No logic board modifications are needed.

 

I would have preferred an original 10mb drive, but this one is dirt cheap. And if I manage to get a working 10mb mmi/seagate in the future, I could always sell this one (probably for a greater price too!)

 

PS: I should probably point out that this ST-251-1 is the MCL1 version: ST-506 compatible. The plain ST-251-1 is only ST-412 compatible.

Edited by BadGoldEagle

Share this post


Link to post
Share on other sites

Well it would only format the drive to what the hyperdrive card is configured for, because I dont see a way where you can enter the C/H/S data of the drive. 

 

So it will only format it to the same number of cylinders. Unless there is a hidden option in one of the formatting utilities to define the drive type. 

Share this post


Link to post
Share on other sites

Well it would only format the drive to what the hyperdrive card is configured for, because I dont see a way where you can enter the C/H/S data of the drive. 

The Miniscribe 8425 found inside the Hyperdrive 20 machines has 615 cylinders. GCC say the boards are identical. So maybe it can auto detect the number of cylinders etc???

 

 

I also contacted a company specialised in old hard drive repairs. They claim (on their website) that they can fix old MFM drives... I'll let you guys know.

Share this post


Link to post
Share on other sites

The boards might be, but the declaration ROM may not be? MFM drives arent usually auto-detectable unless they have some sort of revolutionary method that never made it to the PC side. lol. 

Share this post


Link to post
Share on other sites

maybe it's just... magic? 

mgc.gif

 

In all seriousness though, I think I'm better off getting another WORKING MMI M112 drive. Someone sold one of those on ebay a month ago, maybe another one will surface ?soon?

Share this post


Link to post
Share on other sites

So I got news from the company who specialises in hard drives recovery/repairs and the MMI's completely dead. They said they could retrieve the data on the platters for about $800 though. I'm not kidding. That's how much those guys charge for a HD recovery. That's a LOT of dough.

Thankfully I didn't have to pay anything. 

 

I'm still looking for a replacement drive... Contacted a guy about a month ago, he said that he might get some NOS MFM drives soon.

 

I wonder if I can just stuff a 20mb drive in there... How does the Hyperdrive manages the C/H/S data of the drive? Dunno. 

Nah I'm better off waiting for an exact replacement. At least in the meantime I can just use it as a "normal" 512k as everything else on it works! Time to play Dark Castle! Yay!

 

If you guys know a place here I could get a working MFM drive (that is: tested, a lot of those are untested aka dead), I'd love to hear about it! I should check vintage PC hardware stores... But I don't know any good ones. I'm not a PC kinda guy. 

Edited by BadGoldEagle

Share this post


Link to post
Share on other sites

I have data on an old 80MB PRIAM MFM drive in an old Altos server I had... I've always wanted to get the data off of it... but not sure how to do it.. it's all Xenix 3.1... I thought if I could get a converter board I could use an image program and image it off... this is something on my list to try with that board in my basement... 

 

I used to use this system and it has old data of mine on it.. I always wanted to import the data into a Unix/Xenix emulator and try to boot it.. :)

Share this post


Link to post
Share on other sites

I know emulators existed. But I'm stubborn and I want to have things completely original. I know the SSD will never fail but that the HD definitely will. But I like the sound of the old hard drive inside a 512K. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×