Internal Hard Drive Not Appearing in Finder

I just had to do a reboot of my Mac Pro as Final Cut Pro kept locking up and when the computer was back up, one of my Western Digital 2 TB internal hard drives is missing! When I restart, I got a message saying something like the disc inserted cannot be used. It had 3 options and the first time I hit eject thinking it was talking about a DVD, then when I rebooted again I hit the details button and it pulled up Disk Utility. I can see my HD in the menu but when I click on it is says unmounted. The other 2 TB WD Hard drive is working fine. Do I need to click on the verify disk or repair disk button? What should I do? I have quite a bit of video footage on this drive that is missing so I'm super worried I will lose the videos!

etcetera25 wrote:
The drive is a goner otherwise though. Since I was solely using this failed drive recently, I may have just worn it out, which is too bad, even though I worked with an identical 2 TB WD internal drive earlier this year and never had problems with that one.
Drives shouldn't just wear out from use, at least not in a reasonable number of years. They are designed for that. Drives however do fail. However, that drive is more likely to be badly corrupted than it is to be mechanically failing. When you are finished grabbing the data off it, use Disk Utility to zero it out. If it can successfully be zeroed out then it is most likely fine to continue to use.

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Internal hard drive not showing up in Finder

Hello. Whenever I use Lightroom and Photoshop, I have been getting the error about my startup disk being low on space. I've read through several threads and instructions on different strategies to take. However, many of them start with being able to click on the internal drive within the Devices section in Finder.
My internal harddrive does not appear in the Devices section in Finder. I have iDisk and then two gray harddrive icons that have the name of my external drive. Even when my external drive is not connected to the machine, I have these two.
When I click on them, it just keeps whatever I had clicked on previously. For example, when I click on "Desktop" it shows my desktop and when I click on the mystery gray drive, it keeps desktop.
I've run disk utility > repair permissions and I get several messages that permissions differ on some things and warnings about SUID files on other things.
Am I in the right spot to fix my problem? What kind of error should I be looking for and when I find that error, what do I do?
My thinking is that once I fix this problem, I can move on to my low disk space problem. Finder shows that I have 8.39GB of free space but that goes down to Zero fairly often.
Thanks in advance for your help.

jstetson wrote:
My internal harddrive does not appear in the Devices section in Finder.
Go to Finder Menu > Preferences > Sidebar > DEVISES and check the box next to Hard disks.

External hard drive not visible in Finder or Disk Utility

Hi everyone,
My Wester Digital 2TB external hard drive has disappeared, so to speak, with all my photos. I work as a freelance photographer. Mostly on Lightroom 5.6
When I plug it in, with firewire, I can feel the disk rotating normally however it does not appear in finder or disk utility.
I've tried using a USB cable, restarting my mac, forced restart, changing firewire ports (HD has 2 ports), plugging the HD into a different laptop and nothing.
Ive also searched Finder prefrences and visibility is enabled.
I have no idea what could have caused this as I was using the HD the night before. I didnt pullout without properly ejecting. Maybe the HD is full or almost, but I dont think that would the cause of these troubles.
I'm using a late 2011 Macbook Pro OS X 10.9.4
Any suggestions??
Thanx

An update for anyone who can help me:
I have tried the external hard drive in other computers (mac and windows), each time I get the same problem above.
I have removed the HD from the enclosure and purchased a docking station for it (3.5" SATA). When I plug it in to the laptop it disconnects itself straight away before it is visible. With the windows computers it installs the drivers and says that the device is ready to use, then disconnects before it shows up.
As the HD is not visible there is no option to re-format or anything.
This is very frustrating as I was using the HD with no issues and it randomly disconnected and I have not been able to access since.
Thanks in advance for any help.
Bruce

External hard drive not visible in Finder, but is operating

iMac, 2 Gb RAM, Snow Leopard 10.6.4.
It has 4 external USB drives attached through a powered hub. All of a sudden, after about a year, one of them no longer shows up in ‘Finder’. However, all four drives have an icon on the desktop. The drive is visible and verifiable in ‘Disk Utility’. Double clicking the desktop icon opens the drive and I can copy a file from it. iTunes can see it. From a Macbook’s ‘Finder’, over WiFi, I can see and copy files to and from the drive. Finder Preferences shows nothing amiss. I’ve shut down and restarted the iMac several times with no change. The drive just does not show up in Finder on the host iMac.
Searching this forum has not helped. Any suggestions?
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Well, this is embarrassing. A suggestion from an older thread on Macrumors.com called "Hard Drive does not appear in Finder / Desktop", solved this problem. Simply drag the missing drive icon from the desktop to Finder! Perseverance and different search wording AND reading a lot of stuff pays off.
If other's problem is not solved with this fix, you might benefit from this 10.5-based thread. They also mention an Apple 10.5 fix. Both URL's below.
The op's problem was that the drive did not appear in Finder OR the desktop but was operational. There was a lot of in-depth information with this fix embedded.
Thanks for the interest and suggestions.
Max
http://forums.macrumors.com/archive/index.php/t-209905.html
http://support.apple.com/kb/TA25203?viewlocale=en_US

Pavilion g6 internal hard drive not working , Can I use WD internal hard drive ?

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Hi,
We won't concern about RPM, faster (more rpm) is better. The HDD's are much, much, much, much cheaper now. They were more expensive during a flood in Thailand few yours back. Yes, you can use WD HDD for your computer. You can pick one from the following list:
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http://www.newegg.com/Product/Product.aspx?Item=N82E16822136835
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**Click the KUDOS thumb up on the left to say 'Thanks'**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.

IMac G5 Internal Hard Drive Not Recognized

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See Pondini's TM FAQs.
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External Hard-Drive not showing in Finder despite no errors in Disk Utility.

I have tried to follow certain steps as described in this community but I am at a loss on next steps here. I have a wester digital that I have used for Time MAchne which all of a sudden does not appear on Finder. I have run Disk Utility and I can see it there and run the verify and repart and it reports no problems...

Here is the results of Terminal Query:
/dev/disk0
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Hello everybody!
I really need your help. I tried to upgrade my internal 120gb drive to a Western Digital wd2500bevs. But when I start my Macbook with the Leopard DVD neither the System Profiler nor the Disk Utilities Program recognize the drive for a possible installation. When I reinstall the old drive everything is back to normal and works perfectly.
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You say the drive is "recognized" but your original post stated it was not present in Disk Utility. I'm puzzled. Have you attempted to partition and format the drive?
Extended Hard Drive Preparation
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2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the number of partitions from the dropdown menu (use 1 partition unless you wish to make more.) Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the volume(s) mount on the Desktop.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process will take 30 minutes to an hour or more depending upon the drive size.

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Hello,
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Message was edited by: vladog

Hi vladog
Welcome to Apple Support Communities
You may have tripped the FireWire overload protection when you disconnect or reconnected the Drive.
Eject and disconnect all peripheral devices FireWire and USB, then reset the iMac's SMC.
http://support.apple.com/kb/HT3964
+1. Shut down the computer.+
+2. Unplug the computer's power cord.+
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+4. Release the power button.+
+5. Attach the computers power cable.+
+6. Press the power button to turn on the computer.+
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Internal Hard Drive Not Appearing in Finder

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