Hard Drive Power Issue

[jwillard]

I am running a Tyan S2505T with dual processors and on board raid. I installed 2 new 80GB WD hard drives and the powered on. The power was coming on for about a second then shutting off. I discovered that when I unplug the power cable from one of the hard drives and power on it stays running. If I unplug the other HDD and plug the other back in it still shuts down. Does this mean I have a bad drive?

No Guts No Glory. So I try and try again...

 

[jwillard]

Also just discovered that when I plug another drive into the same power plug that the computer stays on fine. It must be the hard drive.

I just don't understand how the drive would cause the computers power to shut off. I could understand if it did'nt recognize the drive but why would it cause the power to shut off?

No Guts No Glory. So I try and try again...

 

[edfair]

You are probably on the hairy edge of full time power supply shutdown for overcurrent on the 12 supply.

But then again, hard drive driver chips can fail and cause the crowbar.

Ed Fair
Give the wrong symptoms, get the wrong solutions.

 

[micker377]

Try plugging the power plug into the floppy wrong! Same thing happens. (I read this in a book somewhere - I would NEVER do this myself) <grin>

 

[paparazi]

You often see this happening after a blown power supply.
With a new PSU fitted the system keeps shutting down.
This situation is a result of the old PSU that has spiked, damaging the HDD and making it short to ground (crowbar) as edfair points out.
Seems strange to have this happen with a new hard drive.
Martin

We like members to GIVE and not just TAKE.
Participate and help others.

 

[jwillard]

Thanks for all the replys

When I plug another hard drive into the same spot the machine runs fine. I have a new hard drive on the way and I am returning the old one. Will update the post when the new one comes in.



No Guts No Glory. So I try and try again...

 

[jwillard]

Well I received the new hard drive and sure enough the same thing happened. I guess the other hard drive I tested it with was not drawing as much power so it worked.

I replaced the power supply and all is fine now.

Thanks for all the help.

No Guts No Glory. So I try and try again...