Hi I have an external hard drive (p/n = 31686100, model = RPHD-U) that will not show up on my Finder. I use a MacBook Pro with OS 10.5.5. I can see my hard drive on the disk utility application but it won't let me do anything to it. tasha
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Re: external HD won't mount
Okay , so there are some steps to figure out what is wrong with your external.
Firstly , if your computer makes a sound when you plug in your external ,
go to Start-Control Panel-Administrative Tools-Computer Management-Disk
Management , and see if your external drive is listed here with your
local drives. If it is listed , right click on the drive and change the
drive letter to make it appear in "my computer".
If your drive does not make a connection sound when connecting to your
computer and also does not show up , please follow the next step.
Remove the hard drive from the casing if possible and install it in your
computer case or another external case.If the drive works , the problem
is with the casing and you can ignore the drive.
Now , if the problem is with the casing , there are still 3 possibilities.
The USB cable between the drive and the computer may be damaged.
The circuit board which connects your drive to the interface of the external may be blown.
The power supply (if applicable) may have a blown transformer.
latter is the easiest to diagnose , does your external light up at all
when you plug in the power? If not , then this is probably your problem.
On the bottom of the adapter is a label which you will be able to use
to have a new adapter made at your local electronics shop and this will
cost about $30 max. They will also be able to test the adapter with a
clamp meter to see if this is really the problem and this should be
The second component you want to test is the USB cable. If
you have a printer , swop out the cables and see if your printer
functions normally. Most externals use the same connector so you should
be able to test it in this manner. If the cable works go on to the last
step. If the cable is defective , replace it with a new one which you
can find for about $10 at most electronics and chain stores.
last component to test is the circuit board. This is a bit of a grey
zone as you probably won't be able to spot the blown component unless it
failed really badly. With the casing already opened , locate the
external's circuit board and check to see if you have any blackened
components or fluids leaking from some components. If all the other
components of the external worked perfectly , then this is the faulty
part. It is not really economical to replace the circuit as most of the
time it is out of production by the time you need to replace it and it
still costs a lot even if it is available so if your drive is working
perfectly when connected via sata or IDE on your computer , the best is
to buy a new casing and place your old drive in the new casing.
A casing costs about $50 and you could get it at most tech shops and big chain stores like Best Buy.
I hope this solves your problem and please reply if you need more help.
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If the drive is formatted for anything but a MAC, for example Windows, The drive will be seen but not data will show as the mac cannot read most Windows file systems. Try connecting the drive to a windows machine and see if the data can be read.
a new computer? how old is the computer your using and how old is the external hard drive? chances are either the computers pulling every gram of memory out in an attempt to search the hard drive for what you want leaving nothing for you to do other work with. might be upgrade time if its getting on in age.
if the hard drives ageing your going to be better off turning your external drive back into an internal one if you have a tower. you should have room to mount at least 2 drives into the tower. just buy a new hard drive connector and plug it up. the older USB drives work a good bit faster directly connected to the system.
I'm assuming you mean it doesn't appear in Finder. Open up disk utility and it should appear there if you say the MacBook is providing power to the hard drive light. You may have to reformat or reset your Mac if you want it in finder
The fact that you have tried all three connectors suggests that the fault lies with the drive. Either the interface board or the HD itself. If you have access
to another computer you should be able to prove it one way or another.
Over the years I have seen many external drives fail (I had two identical drives of my own fail on consecutive days one proved to be the firewire board in the box, the other was the circuit board built into the HD), and it's quite difficult to decide where the fault lies.
Do you hear the HD spinning when it powers up (press your ear against the case)? You should be able to differentiate between the HD and the noise of the fan. Is there any clicking?
Is it still under warranty?
Thinking about it, if you get nothing with the USB and the Firewire then it's a good chance that the HD inside has failed.
Try using another USB cable or try connecting the HD into another computer. If same problem occurred, then the problem is isolated with the HD.
We can only save the HD by reformatting it once it showed up in the Disk Utility or on the desktop. Unfortunately, there's nothing that we could do if the HD is not mounting on the screen of the MacBook and not showing in the Disk Utility.
The only hope that we could think of is once the HD is detected by another computer. Meaning that we could still reformat the HD.
But if not, then you need to get a new one. Good luck!
check under the system profiler which can be found in the applications
folder and then in the utilities folder. See if under usb whether the
drive is showing under there. If it is, open up disk utility and use
the verify disk to see if there is a problem with the drive, if there
is use the repair disk to repair it.
Other things to check try a different usb port on the macbook or a different usb cable.
Have you tried it in another computer? I think these kind of problems can sometimes be caused by USB voltage problems, especially if your MBP has an old battery (I believe the battery is used as a power buffer to keep size of transformer down). If that doesn't work, see if you can find someone with the same HDD power supply and try switching that over. Failing that it's data recovery, you may be able to do this yourself by switching the actual hard drive into a new enclosure.