Molex Splitter Kills Two Drives?

Xyl3ne

Senior member
May 22, 2004
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I know some molex splitters are kind of dodgy but I've never had this happen before.. I've used this splitter several times on plenty of machines and it figures it decided to kill something in my main box. Two HDDs -- dead. Now I've never had a drive fail like this before. Both just sit idle. No smell of burnt electronics, either. No spin up, nothing. I tried to run Western Digital Diagnostics on it but it just doesn't detect any drives. One drive will actually let the machine boot up if it's connected but the other makes it just stall at "detecting IDE drives". Has this happened to any of you before?
 

LordMorpheus

Diamond Member
Aug 14, 2002
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did you try the drives in another computer? Could it be an IDE channel that got fried (don't see how . . . )

it'd be easier to replace a motherboard than to deal with the loss of that much data.
 

lxskllr

No Lifer
Nov 30, 2004
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I don't know how it could kill a hd, it's just a simple wire system. Visual inspection should tell you if the splitter is ok or not. Is your psu good? Maybe it was a voltage problem.
 

Xyl3ne

Senior member
May 22, 2004
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Nah, the drives are dead. I already got a new HDD and I'm running on the machine now. The splitter seems fine. Nothing looks physically wrong with it. I connected a fan to it and it worked. I'm too afraid to hook up anything else. My PSU is fine. Like I said, I went and bought another HDD and it seems fine.
 

necine

Diamond Member
Jan 25, 2005
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I had a splitter kill a WD 80 gig I had about 2 years ago. I haven't touched one since.
 

Zepper

Elite Member
May 1, 2001
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Unless it was miswired, I'd be highly skeptical that a power Y could kill a drive. More likely a coincidence and the blame was placed improperly.

.bh.
 

Xyl3ne

Senior member
May 22, 2004
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Both drives are different ages and they both worked perfectly fine until I put the splitter into the equation. Once I powered the machine on with the splitter (I know how to hook up a splitter, I've been building and repairing machines for longer than I can remember) the drives no longer did anything. I tried them on another power supply in a different computer and still the same result.
 

CrispyFried

Golden Member
May 3, 2005
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I would blame it on a static shot if it happened as you say. A good splitter cant do that. Its faintly possible that a defective connection cycled power rapidly (as it connected/disconnected) but even that shouldnt kill a drive unles it was marginal to begin with.

 

dguy6789

Diamond Member
Dec 9, 2002
8,558
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Having splitters kill harddrives is not uncommon. My recomendation is only using splitters for very low power consuming things, such as fans.
 

lxskllr

No Lifer
Nov 30, 2004
60,220
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Originally posted by: dguy6789
Having splitters kill harddrives is not uncommon. My recomendation is only using splitters for very low power consuming things, such as fans.



I'm not arguing, but through what action would a splitter kill a harddrive? I'm a little suspicious, but if you all say it happens, I guess I believe you :^).
 

Mrvile

Lifer
Oct 16, 2004
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I also doubt it was the splitter, as I have been using one forever and splitters are sometimes necessary to run certain things.
 

shoRunner

Platinum Member
Nov 8, 2004
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its more likely that PSU rail couldn't handle the extra load of a 2nd hard drive added to it and voltages went wack
 

dguy6789

Diamond Member
Dec 9, 2002
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There are plenty of low quality splitters out there. If there is a break in the wire inside, it can cause some bad things to happen.
 

Mark R

Diamond Member
Oct 9, 1999
8,513
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81
Connected backwards?

Although hard drive connectors are keyed, I've seen some connectors of such poor quality, that connecting them backwards would be possible with a bit of brute force.

Another possibility is that both ground wires (black ones) were disconnected - although I wouldn't expect damage, if this happened I suppose it might be possible if the IDE cable was connected correctly and the drive tried to get it's ground supply thought the IDE interface.
 

Oyeve

Lifer
Oct 18, 1999
22,071
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Originally posted by: necine
I had a splitter kill a WD 80 gig I had about 2 years ago. I haven't touched one since.

I had a faulty splitter kill a 250gb SATA drive. Was shorting out and the drive kept powering down and if I tapped the splitter it would spin up. Instead of replacing the splitter immediately I kept tapping it then zap. Dead drive. Since then I bought a PSU with 10 built in connectors. No more splitters for me!
 

Varun

Golden Member
Aug 18, 2002
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.................Molex in
......................|
......................|__________
...................../................/
..................../................/
.................../................/
.....Molex Out......Molex Out

It really looks like a Y but the forum won't let me format it very well
 

dguy6789

Diamond Member
Dec 9, 2002
8,558
3
76
Splitters are not something to be avoided. Just don't use them on anything that takes serious power. It is ok to use them on fans.