Internal Drive not visible

A day after installation of Leopard, my second internal drive (bought from Apple) has disappeared from Finder and from my desktop. Applications that know that it is there (e.g., iPhoto) can open files on the drive correctly, Disk Utility can see it and says it is mounted and OK, and a second Mac running Leopard on my network can see the second hard drive. However, I cannot save any new files to it, since Finder (or the "Save" dialog boxes) do not show it. Also, it is visible, but greyed out on a Mac on my network that is running Tiger.
I called Apple and they suggested that if I reformat it it might reappear, but this seems a bit extreme. Any other suggestions?

Thanks for the reply. However, I didn't get a chance to try that, as I finally found another posting that addressed the issue a few minutes after I gave up searching and posted my own question. That posting was:
http://discussions.apple.com/thread.jspa?threadID=1208729&tstart=90#5705189
I used the suggested script to change the "visibility" attribute of the drive that had disappeared and it worked great.

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See Pondini's TM FAQs.
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See this thread, this is 3rd regarding recovery/restore - as a starting point.
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https://discussions.apple.com/message/25145113?tstart=0#25145113

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Last week my iMac started taking a long time to boot up. I reinstalled a backup from bootcamp. It work for a couple of days then starting hanging up after the start up chime. When I turned it on the apple logo would come up with the spinning pin wheel along with a progress indicator bar (this was new) showing the progress for the start up. So I installed OS on one of my external HD with the intent to copy clone it to the internal. While building the external HD, both internal and external drives were visible in the finder. Now that I have the external up and running, the internal HD does not show up in Finder or System Profile/ Hardware. I used other software to show invisible files, and Disk Utility. Neither could detect the internal HD. I have owned this iMac for 3 yrs and one month.
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Hi P-T
Sounds to me like the Hard Drive has died and needs to be replaced.
To have the Hard Drive replaced, simple call your locate an Apple Authorized Service Provider.
in North America, see > http://www.apple.com/buy/locator/service/
or for World Wide service, see > http://support.apple.com/kb/HT1434
If your technically inclined and would like to replace the Hard Drive yourself, google around there are plenty of good Video's and DIY's out.
http://blog.sunhop.net/2009/03/upgrade-replace-imac-hard-drive-2008.html
http://www.youtube.com/watch?v=2YsCTNVEYt8
I would like to also suggest using a WD Caviar Blue as a replacement Drive instead of a WD Caviar Black or a Seagate, it is my experience that they run cooler, quieter and are better suited for the all-in-one desktop systems.
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Hi all,
I have had a good look through previous discussions and I can't seem to find an issue relevant to mine.
My external hard drive has 2 partitions (1 time machine back up, 1 general hard drive). The issue is that the HD is running when it is plugged in however it is not visible in either disk utility or finder.
I am running OS X 10.10 (Yosemite) on a 2010 MacBook Pro. I also have parallels desktop running windows 7. When I boot windows and plug in the HD I usually get the option to mount the HD to either OS X or Windows. With this issue the option window appears for a split second (not enough time to select either) and then disappears. It seems that the HD may be ejecting itself as soon as it is registered by the computer. I have tried using a different power cable for the HD and also a different usb cable, this doesn't help.
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An update for anyone who can help me:
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An update for anyone who can help me:
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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.
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http://forums.macrumors.com/archive/index.php/t-209905.html
http://support.apple.com/kb/TA25203?viewlocale=en_US

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It DID break down a week after I received a call from Apple asking me to purchase an extended warranty. I wouldn't make that up.
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At this point, I'm trying to save this box from becoming landfill. I bought a Dell PC laptop this past weekend for a third of what I paid for this iMac, and when it breaks down or obsoletes itself in 2 years, it won't be so difficult to swallow getting rid of it for something new.
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Log Name:      System
Source:        BROWSER
Date:          10/04/2015 12:52:44 AM
Event ID:      8019
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
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<Event>
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Internal Drive Not found

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This question was solved.
View Solution.

It is a fairly common problem and there is a Microsoft Autofix for it:
http://support.microsoft.com/kb/982116
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Internal Drive not visible

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