Western digital hard drives

I have a HD 640G/WD WD6401AALS Hard Drives (2)

I have them hooked up with sata cables, in raid 0,

Do i need those little jumpers that go in the end of some of those hard drives????

Thanks, but the problem im having is the pc will just freeze up after a few min , no matter what im doing, the hard drive light goes out and the screen just freezes where its at, so i thought maybe the diagram below meant i could put it on 3-4 and the hard drive wouldnt sleep!
Any thoughts?/



How can I enable and disable PM2 (power management) on a Western Digital Serial ATA hard drive?

Answer
Serial ATA hard drives do not have a jumper block to designate whether the drive is master, slave, single, or cable select, as EIDE hard drives do. There is only one Serial ATA drive per channel (cable), so no master/slave relationship exists.

Note: Power management allows the drive to be powered-up into the Standby power management state to minimize inrush current at power-up and to allow the host to sequence the spin-up of devices.

All Western Digital Serial ATA hard drives come with PM2 (power management) disabled. This setting should be used for desktop/workstation computers. If you are using the drive in a RAID/enterprise environment, and wish to enable power management on the drive (controlled spinup via spinup command per ATA standard), place a jumper shunt on pins 3 and 4.

Note: Pins 5-8 are for factory use only and should not be used by end-users.

Power management off:



Power management on:

do you have any jumpers on yours??

Have you tried running the WD Diagnostic Tool?

I'm pretty sure you can look elsewhere besides the HDD jumpers. I DID have jumpers on my older 160GB enterprise drives in RAID-0 and never had to change them. Besides, if you did any reading at all with setting up RAID-0 SATA drives, I am guessing that nobody mentions "oh yea, and make sure to set your jumpers".

There are dozens of reasons why your machine could be freezing. Could it be drive-related? Sure. It could be the RAID controller itself. It could be a bad sector on the drive. It could be just a fautly Windows install. It could be the Windows drivers installed for your RAID. It could be RAM. It could be that your PSU can't handle another drive. It could be a weak power connection on one of the drives. It could be the motherboard. If you just installed Windows on the array, it could be any other piece of hardware you have drivers for such as the sound or video card. It could literally be anything, but it's probably not due to the jumpers on the drives. Because it doesn't seem to produce any errors, you are stuck with doing the process of elimination to figure it out. Since it seems to freeze within Windows, you can't really disconnect the drives to find out if that's the cause. You can, however, uninstall your sound card and other adapters that you don't absolutely need to boot in to Windows. It could make for a messy Windows installation, but you may want to consider reinstalling anyway just in case. After you reinstall, don't install any drivers or other hardware, but see if it freezes. If not, then install one piece of hardware. If after installing something it starts to freeze, take that piece out and see if it freezes again. If not, then you've found the problem. It's going to take time but you can do it.

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