Hard drive not recognized AFTER installing leopard

So I installed Leopard on my 12in Powerbook G4, having the usual problem of non-recognition of my hard drive (from a third party) but was able to install Leopard after fiddling with disk utility.
Now the computer will not recognize the hard drive after I restarted it. I've tried rebooting holding down the option key and selecting the hard drive and it still didn't recognize after restarting (it shows a prohibit sign). Also tried booting in single-user mode but it keeps waiting for the root device forever.
Has anybody had a similar problem?

Unplugging worked!!!
I have no idea what PRAM is but someone said that unplugging your computer resets it so, I thought I'd give unplugging a shot. So, I shut down my computer and unplugged it. I also unplugged the power on the HD. (because I wasn't sure which one they were talking about.)
Anyway, I went away for about five minutes.
I came back plugged in the HD power first. Then, I plugged in the power cord for the computer and turned it on.
As soon as I logged in I was asked if I wanted to use my external HD for Time Machine backups.
I saw the icon for the HD on the Desktop where is belongs. I can open the drive and access the files with no problem.
Try this if you haven't yet.

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Hard drive not recognized after a brand new replacement put in 2 weeks ago!

Basically, my MBP was having the symptoms of needed a new hard drive. It was taking abnormal amounts to think and load thinks when it started up (only part of the time). I cleared all the software off of it and reloaded Mac OS just to be sure it wasnt a software issue. Apple took my computer and replaced the hard drive about 2 weeks ago (90gb, 7200 rpm). By the way the MBP is a C2D with 2 gb ram.
Immediately after getting my computer back it seemed to work fine. It has been about a week and a half since I got it back and last night trouble started. First, it wouldnt boot up all the time (id get the flashing question mark on the folder). I checked startup disk and booted it that way, no results. When it did start up, it would lock up shortly after when using applications such as safari. I then booted it to the system disk and performed the first aid functions on the disk... no results. And now, the next morning, when i boot to the disk, the hard drive itself is not even recognized under disk utility??? So basically, I cant reload OS again because I cant see the installation disk. Is this a a hardware issue even though I just replaced the hard drive?
what do i do??

Hi MBPrunner;
It appears you have the misfortune of infant mortality whereby a bring new part fails in a short period of time. This does happen. I have seen it numerous time in my years of server support at IBM. My suggestion is take it back it back to Apple with all of your paperwork. They should make good on it.
Allan

External hard drive not recognized to install

I have a MacBook from Dec 2008 that I've upgraded to OS X 10.8.4. I just purchased a WD My Passport external hard drive for Mac. It should just open the installation guide when plugged in but nothing happens. I turned off/on the computer, checked for missing updates, tried to manually install the hard drive utilities to no avail. The external hard drive makes a noise and the indicator light blinks when I plug it in the the USB cord (it's configured for 2.0 & 3.0) but nothing shows up on the computer. Does it have somthing to do with upgrading to Snow Leopard/Mountain Lion? Did some driver get lost along the way? The only solution I can think of is that the WD drive is defective, but I hope not. Help is much appreciated.

Hey, I'm trying.
WD website says:
Does my Western Digital Hard Drive require a driver? Where do I get one?
Most current WD drives do not require additional drivers on the Windows or Mac OSX Operating System (OS) beyond the ones that are included with the OS.
In order to simplify the installation process WD elected to use the standard drivers that are built into common operating systems. While there are a few exceptions to this, in general, there are no drivers provided by WD for our drives. That's because the drivers a WD hard drive or SSD uses are part of the Operating System being used. As such, any trouble with these drivers should be handled by the regular line of support for the Operating System in question - in most cases by contacting the system's manufacturer, IT department, or the publisher of the OS.
http://wdc.custhelp.com/app/answers/detail/a_id/1708/session/L2F2LzEvdGltZS8xMzc 3NDczNDE5L3NpZC9pWWl1a0h5bA%3D%3D

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My external Hard Drive is not recognized on start up. I have to unplug it and plug it back in for it to be recognized.
All this since 10.6.8 updated today.
I'm a fool for updating the same day.
This has happened before and I always forget the bugs in the software when it first comes out.

Alright, I'm gonna go ahead and close this thread. I found out the solution to my issue. Turns out it was a problem with a system file I changed right before installing. The error only occurred on a restart... the required 10.6.1 reboot was the first reboot since the change, so thus it looked like the culprit.
If you want a more thorough explanation of my problem (highly HIGHLY doubt it's gonna help you guys out), check this thread --> http://forums.appleinsider.com/showpost.php?p=1480362&postcount=8
Sorry for the trouble!

External Hard Drive not working after installing mavericks

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No. It may just require a 00 Phillips driver depending upon the enclosure. Do the swap on a towel so that the little screws don't bounce away from you. You will have to pull the HDD out from the connecting plug. Do it in a straight line,don't bend it, and you may have to slowly increase pressure to get it out of the connecting plug.
It's not rocket science.
Ciao.

External hard drive not recognized after time machine locked up

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KTM450rider wrote:
Do I need to boot from the install DVD?
this is often the easiest and eliminates any "busy drive" problems. what's wrong with booting from the install DVD? takes a couple of minutes.
My main hard drive is OK... the drive that I am having problems with is an external hard drive that I was using to back up my lap top. I just want to get the external drive reformatted, but disk utility will not erase it. I get an error that disk utility shut down, "please check the drive and make sure that the drive is not in use or programs are still running"
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What's happen with Lion, Apple?

Hey Yelghoul,
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Lion Developer

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Even backups need backups too.
And a 'good' case is one where you can pulll the drive out and pop it into your Mac pro drive bay.
power supply bricks are known issue.
Mac OS updates that affect those models.
LaCie almost by their own invented the term and idea "reset firewire bus" routine after all.
Years and you can assume not forever but eventually it could and will fail.
I'd pick up a "spare" or replacement unit, one with eSATA/FW800/USB3
http://www.macsales.com/firewire
CallDigit 2 x SATA plus 2 x USB3 $139 - USB3 card and interface works better even on legacy (how long and old is USB2 now?) USB drives.

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No. It may just require a 00 Phillips driver depending upon the enclosure. Do the swap on a towel so that the little screws don't bounce away from you. You will have to pull the HDD out from the connecting plug. Do it in a straight line,don't bend it, and you may have to slowly increase pressure to get it out of the connecting plug.
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monicadale wrote:
I do see an "unknown device" in "About this Mac," but I can't get it to recognize it.
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diskutil list
Press return.
If it sees the disk, note the number of the disk (far left column) you want to mount.
Then, enter this command:
mount /dev/(number of disk)
Put in the number without parenthesis.
Press Return.
You may also want to run sudo diskutil repairVolume /dev/(the number of the disk)
Let us know.
-mj

Micronet 500 GB Hard Drive NOT recognized after 1 year of seamless use

Micronet 500 GB Hard Drive
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Most persons that have installed an SSD that was smaller than the factory drive have been unable to use any HP Recovery Media with the SSD.
As an alternative, if you can still read the 25-digit Windows product key on the Microsoft COA affixed to the bottom the computer, you can install Windows 7 Home using this key. Please see "How to Install Windows 7 Without the Disc" for instructions on how to download Windows 7, create the installation media, and install Windows 7 using the 25 digit product key from the Microsoft COA on your computer. Please note that this installation will not have any of the HP customizations or HP value-added that was original installed on your computer. Also note that you will need to download and install most of the drivers from the HP G62t-350 CTO Notebook PC Drivers page.
Links to Windows 7 SP1 can be found HERE and HERE.
Direct link to the Windows 7 USB/DVD Download tool. Use this tool to create a bootable DVD or USB Flash Drive from the Windows .ISO
If you have any further questions, please don't hesitate to ask.
Please click the White KUDOS "Thumbs Up" to show your appreciation
Frank
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This is a user supported forum. I am a volunteer and I don't work for HP.
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This isn't my question, but I'm having the same problem (with a Western Digital) and thought I'd share a screenshot of disk utility for comparative purposes.
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Usb hard drive not loading after security update

usb hard drive not loading after security update
I can't seem to find any other posts about this problem.
I have three external hard rives connect by a USB hub to my iMac.
Problem is that if I turn on the hard drive(s) AFTER start up I get a message that the drive either was not recognized by the OS or that it was ejected unexpectedly.
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mahalo.

Yes, you can still use those instructions to reset the PRAM.
You said that you booted to your install disk and that your primary drive did not show up at the Select a Destination screen? That usually means that the computer is either not recognizing your partition, or it's not recognizing the hard drive itself.
Start with this article and follow all the steps even if you already tried them. I suspect that you'll get to step 4 and you'll end up having to call Applecare. If you haven't done those steps, they're most likely going to make you do them anyway, so you might as well get them done before the call.

Hard drive not recognized AFTER installing leopard

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