Thread
Classic hard drive intermittent spin up
Sometimes when I switch on my Classic the hard drive starts to spin up then suddenly slows down like the power's been cut, it makes a noise and then starts to spin up again... and would go round in a loop if I left it on. xx(
At other times it just spins up and everything's fine :b&w:
I've tested the voltages on the external drive connector and get 5 volts on pin 6 and near enough 12 volts on pins 7 and 8.
I don't know what to try first, the drive, or caps on the analogue board? and would like to know if it's a "Classic" case of one or the other.
Any advice welcomed.
At other times it just spins up and everything's fine :b&w:
I've tested the voltages on the external drive connector and get 5 volts on pin 6 and near enough 12 volts on pins 7 and 8.
I don't know what to try first, the drive, or caps on the analogue board? and would like to know if it's a "Classic" case of one or the other.
Any advice welcomed.
the A/B needs caps ASAP,
you can do it your self, or i can do it for you.
The HD is not getting enough power, and its going to end up getting worse.
You will notice that if you took a hair dryer to the smoothing caps in the A/B, heated them up some then flipped it on,
The hd will probably start up and work normally, for the time being.
ps:
all the caps grouped together near the speaker are the ones in question.
.
you can do it your self, or i can do it for you.
The HD is not getting enough power, and its going to end up getting worse.
You will notice that if you took a hair dryer to the smoothing caps in the A/B, heated them up some then flipped it on,
The hd will probably start up and work normally, for the time being.
ps:
all the caps grouped together near the speaker are the ones in question.
.
macclassic,
Here is a diagram of the power supply for the Macintosh Classic II: https://drive.google.com/file/d/0B6j6P7lBWw-BVU5LZVA4SmRSTlE/edit?usp=sharing
Also, for reference, the Macintosh Classic/II service manual: http://tim.id.au/laptops/apple/legacy/classic_ii.performa_200.pdf
If the capacitors have leaked make sure to give the board good clean with alcohol.
Do you have any other 50 pin SCSI hard drives you can try?
I hope this helps!
Here is a diagram of the power supply for the Macintosh Classic II: https://drive.google.com/file/d/0B6j6P7lBWw-BVU5LZVA4SmRSTlE/edit?usp=sharing
Also, for reference, the Macintosh Classic/II service manual: http://tim.id.au/laptops/apple/legacy/classic_ii.performa_200.pdf
If the capacitors have leaked make sure to give the board good clean with alcohol.
Do you have any other 50 pin SCSI hard drives you can try?
I hope this helps!
If its a quantum hard drive, this behavior is expected.
Thanks for some "very" good information.
I've already replaced some caps on the logic board to fix a losss of sound, so it seems like more of the same.
Techknight, could you please give me more information on Quantum drives as I'm still concerned about the drive and am considering the following for plan B. http://www.ebay.co.uk/itm/IBM-WDS-380-80MB-50-Pin-SCSI-Drive-/380683502787?pt=UK_Computing_Other_Computing_Networking&hash=item58a28144c3
I've already replaced some caps on the logic board to fix a losss of sound, so it seems like more of the same.
Techknight, could you please give me more information on Quantum drives as I'm still concerned about the drive and am considering the following for plan B. http://www.ebay.co.uk/itm/IBM-WDS-380-80MB-50-Pin-SCSI-Drive-/380683502787?pt=UK_Computing_Other_Computing_Networking&hash=item58a28144c3
UPDATE. I de-soldered the caps from my A/B and nearly all of them were wet underneath !!! which is a wake-up call, so now I'm shopping for caps.
My hard drive is a Conner CP 3040A ?
My hard drive is a Conner CP 3040A ?
I replaced the caps near the speaker and my problem remains, so I tried the drive in my 6100/60 and it's doing the same
So it's the driive after all.
Plan B, has anyone put one of these in a Classic? http://www.ebay.co.uk/itm/IBM-WDS-380-80MB-50-Pin-SCSI-Drive-/380683502787?pt=UK_Computing_Other_Computing_Networking&hash=item58a28144c3
So it's the driive after all.
Plan B, has anyone put one of these in a Classic? http://www.ebay.co.uk/itm/IBM-WDS-380-80MB-50-Pin-SCSI-Drive-/380683502787?pt=UK_Computing_Other_Computing_Networking&hash=item58a28144c3
why not use a morden sca server drive?
you can pickup a 36gb sca drive for about 8 quid, then the adapters are a couple of quid
the only problem is that these do not have termination, so you either need a passthrough terminater, a external terminator, or use one of my terminated adapters
my only concern would be heat, as sca drives can get quite hot
you can pickup a 36gb sca drive for about 8 quid, then the adapters are a couple of quid
the only problem is that these do not have termination, so you either need a passthrough terminater, a external terminator, or use one of my terminated adapters
my only concern would be heat, as sca drives can get quite hot
macclassic,
I bought one of these drives last summer and used it in my SE/30 and it worked very well; I think they're NOS!
Thanks for the suggestion max1zzz only I don't need another challenge at the moment, so I looking for the easier option. :b&w:
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"sadmanonatrain" I'm interested. Apart from formatting and blessing was your IBM drive plug and play? or did you have to set some jumpers (or termination) on it?
New Old Stock, yes, but hopefully well stored !
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"sadmanonatrain" I'm interested. Apart from formatting and blessing was your IBM drive plug and play? or did you have to set some jumpers (or termination) on it?
New Old Stock, yes, but hopefully well stored !
macclassic,
The drive was contained in a anti-static bag and its external condition was very good!
I hope this helps!
To use the drive I'm my SE/30 I set the jumpers to SCSI ID '0' so the Mac could use it as a boot device. The data sheet that deals with drive specification and setting a SCSI ID is still available online.
The drive was contained in a anti-static bag and its external condition was very good!
I hope this helps!
Thanks for replying. Sounds good, I'm going to order one ASAP
If the sticker on the drive says "Quantum" then it's definately the hard drive. Those hard drives always fail after a while.
Take a look at http://68kmla.org/forums/viewtopic.php?p=157874#p157874 if you're keen to risk trying to fix it. For a temporary fix (to recover your data), I've heard that opening the drive while it's spinning up and then manually unparking the heads can get it going. Remember to put the cover back straight after unparking the heads though.
Take a look at http://68kmla.org/forums/viewtopic.php?p=157874#p157874 if you're keen to risk trying to fix it. For a temporary fix (to recover your data), I've heard that opening the drive while it's spinning up and then manually unparking the heads can get it going. Remember to put the cover back straight after unparking the heads though.
No it's definitely a Conner.
Thanks, but I'm not ready for Open-Drive-Surgery yet, though last night I had to give a Barracuda a slight tap to get it spinning, like tapping old electric fuel pumps to seperate stuck contacts.
Thanks, but I'm not ready for Open-Drive-Surgery yet, though last night I had to give a Barracuda a slight tap to get it spinning, like tapping old electric fuel pumps to seperate stuck contacts.
I havent run into a conner yet (outside of the one in my portable). So I cant say for sure of its failure modes.
I had to make some serious brackets to get the full height 80MB IBM drive in, to move it back and towards the center of the machine, see picture.
But the good news is, it makes some great start up noises, reads and writes a lot faster and recognises all of the 80MB !
I'm very pleased :b&w: :b&w: :b&w:
But the good news is, it makes some great start up noises, reads and writes a lot faster and recognises all of the 80MB !
I'm very pleased :b&w: :b&w: :b&w:
Umm...
The guy I got my Mac's current hard drive from gave me a Conner... But apparently it's an "extra durable" model (by coincidence, I guess). The kind you would find in a hospital, or even a space shuttle.
I did think that Conner's were quite popular back in the day, weren't they? But then, so were Quantums...
macclassic,
It's nice to see your Classic running properly; there are a nice machine especially when you boot it from its ROM.
Those full height drives always make characterful noises!
Enjoy!
It's nice to see your Classic running properly; there are a nice machine especially when you boot it from its ROM.
Those full height drives always make characterful noises!
Enjoy!
I like your custom mounting, good job. And good on that AB cap job too! Oh did you end up doing the caps on the mainboard as well? - if not might want to be something to keep an eye on. Also keep your Connor around… the controller board might be useful at one point with your expanding vintage mac collection 
Well ive owned Conners back when they were in active use. I had a conner 230mb IDE I was using on an old 486 W95 tower back in 97 i think it was. So it was antique for the time, nothing like they are now.. lol... i let that sucker run with the cover off for the fun of it, and it ran for days like that before it finally crashed.
Yes, very handy, I booted it from the ROM and then formatted the drive with HD SC Setup 7.3.5+ on a floppy before installing the system.
I forgot I had a "dual boot" machine!
lol… yeah i do like that feature of the classic!
Having worked with dozens of these smaller capacity drives, here's a bit of insight into the brands and the like:
Conner: The 40MB Conner drive was very common in Classics. I've also seen it used in LCs, but the Quantum LPS is much more common there. I've had very good luck with Conners; only one has failed. They weren't designed to be a performance drive; if memory serves me correct, they score lower on benchmarks than the Quantums from the same time period (see below). It's also tough to rig up an LED to these if you're putting them into an SE. Still, I prefer these drives to their Quantum counterparts in 2013 and am making an effort to look for scrapped Classics simply to pick up these drives.
Quantum: There were many different Quantum drives used by Apple and other companies from the late 80s/early 90s. Here's a breakdown of the different drives and my observations:
LPS Series: These were probably the best drives available when they came out, as they were quiet, fast, and reliable. That is, until they got to be about 15-20 years old. The majority of mine have died. No capacity seems more reliable than another. They don't seem to play nice with early Classics for some reason. I had one in a Classic with a Revision A analog board in 2000 which only spun up half the time, if that. When I put it into an SE a few years later, it worked absolutely fine. These drives were very common in LCs, IIsis, and later IIcis.
ELS Series: These are noisier than the LPS drives and even less reliable. Most of these are 80MB or larger and seemed to come out around 1993-ish. I think I'm down to two of these in working condition. I've seen these quite often in Color Classics.
Anything older than 1990: Hit or miss for 3.5" drives. The 40MB drives seem to hold up pretty well. The 80MBs are notoriously unreliable. I have yet to find a good one; these were even bad when they hit the 10 year mark. The 5.25" drives weren't bad. You can find these drives in some SEs and SE/30s, as well as some of the earlier Mac IIs with 3.5" drives.
Miniscribe: These are the slow, noisy, often trouble-prone 20MB drives in SEs. I've actually found the good ones will go on for a long time; many of my current spare drives are working MiniScribes.
IBM: I only have one of their 3.5" SCSI drives, but it does seem quite good. I think I'll be looking for a few more as my Quantums continue to succumb to Quantumitis.
Conner: The 40MB Conner drive was very common in Classics. I've also seen it used in LCs, but the Quantum LPS is much more common there. I've had very good luck with Conners; only one has failed. They weren't designed to be a performance drive; if memory serves me correct, they score lower on benchmarks than the Quantums from the same time period (see below). It's also tough to rig up an LED to these if you're putting them into an SE. Still, I prefer these drives to their Quantum counterparts in 2013 and am making an effort to look for scrapped Classics simply to pick up these drives.
Quantum: There were many different Quantum drives used by Apple and other companies from the late 80s/early 90s. Here's a breakdown of the different drives and my observations:
LPS Series: These were probably the best drives available when they came out, as they were quiet, fast, and reliable. That is, until they got to be about 15-20 years old. The majority of mine have died. No capacity seems more reliable than another. They don't seem to play nice with early Classics for some reason. I had one in a Classic with a Revision A analog board in 2000 which only spun up half the time, if that. When I put it into an SE a few years later, it worked absolutely fine. These drives were very common in LCs, IIsis, and later IIcis.
ELS Series: These are noisier than the LPS drives and even less reliable. Most of these are 80MB or larger and seemed to come out around 1993-ish. I think I'm down to two of these in working condition. I've seen these quite often in Color Classics.
Anything older than 1990: Hit or miss for 3.5" drives. The 40MB drives seem to hold up pretty well. The 80MBs are notoriously unreliable. I have yet to find a good one; these were even bad when they hit the 10 year mark. The 5.25" drives weren't bad. You can find these drives in some SEs and SE/30s, as well as some of the earlier Mac IIs with 3.5" drives.
Miniscribe: These are the slow, noisy, often trouble-prone 20MB drives in SEs. I've actually found the good ones will go on for a long time; many of my current spare drives are working MiniScribes.
IBM: I only have one of their 3.5" SCSI drives, but it does seem quite good. I think I'll be looking for a few more as my Quantums continue to succumb to Quantumitis.
I love the servo-armature on the mini scribes. It provides them with such a unique sound.
Luckily the only thing you gotta do in the quantums to get em going again, is replace the rubber.