OS X :: External Hdd Not Showing Up Even In Disk Utility?
Aug 15, 2009
I've been having trouble with my Western Digital 160GB HD, its one of the MyPassport ones or what not. It used to work like a charm and had for a while but a couple of days ago it just stopped being able to be read or even recognized on Macs. I tried this laptop and another macbook pro and both would not show the HD on the desktop or even Disk Utility. When I open the Disk Utility when the ExHD is plugged in, I just get that loading circle and it will just do that indefinitely. Same thing with System Profiler as well.
I don't believe I damaged it in anyway, I hear no clicking and it seems to "boot" smoothly when it's plugged in, so would this mean its a corruption issue? I have been plugging this in to different Macs recently, (3 total) and one of which runs Leopard while the other two run Tiger. Would that cause the issue? (the reason I ask is that this all started after I had plugged it into the different OS.) I haven't tried to plug it into a PC yet, i'm going to do that today but I had tried doing the CMD + Option+ P + R reset till the second beep and I also did a hard reset by unplugging everything and waiting a bit then holding the start button down until it beeps.
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Sep 7, 2009
Anyone knows why my external HD (USB disk connected to Airport extreme) does not show up in disk utility? (It sits on my desktop just fine and is fully functional) I' want to erase a partition but now i don't know how.
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May 12, 2012
i have this strange issue that occured just out of nowhere without me (knowingly) having contributed anything to it.yesterday i launched my iMac and my external firewire drive wasn't showing up in neither the finder nor on the desktop. i instantly thought about a hard drive crash, but soon tried other things to evaluate (or not) my guess.
for instance, i unplugged the drive waited a few minutes before i plugged it in again. since this iomega drive is also equipped with a regular usb port i also switched cables and tried connecting it via the iMac usb sockets as well as via an usb hub without any luck. the drive still won't show up. so i launched the Disk Utility, to see if the drive needs some checking/repairing, but to my surprise it wasn't showing in Disk Utility either.
thus far i only considered this to be an issue with only this particular external drive, but when i eventually switched on a 2nd external drive (this time an usb drive i use for Time Machine) that drive also refused to show up in either the Finder or the Disk Utility app.
curious as i was, i then fired up a 3rd and 4th external drive and now had all 4 drives running at the same time. none of which were showing up, just as if they weren't even connected with the iMac.
this strikes me as more than odd. i've heard about hard drive failures and crashes. they just occur over time. maybe and under some very strange coincidences it is possible that two external hard drives quit their jobs at the very same time, but seriously .... 4 of them?? i hardly think so.
well, maybe it's the iMac's usb/firewire controller that's causing the trouble, i thought. but then again, my other connected devices (iPhone, iPad, Printer, Scanner, eyeTV) are functioning and get detected just fine as far as i can tell.
i have no idea what's going on. i dismiss the idea of 4 external drives having crashed all at the same time just as much as i don't think that the iMac's usb/firewire controller has got any issues. re-formatting any of the 4 drives is out of the question and even if i'd consider such desperate measures, the Disk Utility wouldn't let me re-format anything anyhow, because the drives aren't listed there. i wish i could just use my Time Machine to resolve the issue but, as i mentioned earlier, i can't access the Time Machine because it also won't show up.
Info:
iMac, Mac OS X (10.7.4)
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Jun 24, 2014
I get this question mark along with a folder when starting up. I tried holding down the option key when turning on the power and then I get an internet recovery along with a globe. I click on the arrow below it and it takes maybe 15 minutes to start up. Then i get this disk utilities screen. I'm now unable to do anything. When going into disk utility, disk 0 shows with Mac OS X base system underneath it. All the clickable buttons are faded out. Is there something wrong with the hardrive? and where could i get this fixed? There isn't a warranty on it.
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Apr 9, 2012
I was going to run Disk Permissions and when I opened it up, there is a decrypted file.dmg showing. Here is it's path:/var/folders/2d/vmlqi1 d0gzcs7mxi nnl 1w0000gn/T /decryptedFile.dmg...I opened it and saw that it has something to do with installing Adobe Flash Player. I remember downloading and installing it a couple of days ago. I've adonw this previously, but never had the disk image show up in Disk Utility before. How can I get rid of it? It seems to be in a folder calledl "T" that I can't find anywhere.
Info:
MacBook Pro (17-inch Late 2011), Mac OS X (10.7.3)
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Jun 10, 2012
When I start my mac I get the folder with the question mark on it. I put in start-up disk and ran disk utility put doesn't show the HD anywhere, does that mean its dead? I need to recover that drive and get it fixed fast.
Info:
iMac (24-inch Mid 2007), iOS 5.1.1
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Jan 6, 2009
I am using a Mac Mini, Which is having a capacity of 74.2 GB. Hardly I made use of 15 or 16 GB of that. As I felt some slowness, I tried running "Disk Utility". Recently I found that the free space is only 2.4GB, instead of around 55GB..
Disk Utility is showing
USED SPACE :71.8GB
If i am calculating all folders in "Machintosh HD" (Application, Library,System, etc..), it wil come around 14-15 GB only.
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Jul 18, 2010
my HD fried so I just installed a new 250GB HD about 20mins ago. It's not showing up on the disk utility. It shows one for 4.8GB but not the 250GB? bad connection? I'll try to reconnect it again. It's a Seagate, same brand as I took out of my 1.66 intel Mac mini.
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Jun 24, 2008
I just replaced the internal hard drive on my G4 iBook. My problem is the drive is not showing up in Disk Utility, the system install disk, or when I have the iBook in target mode and connected to my tower. I believe the old drive had died. When I ran the Hardware Test on it, I received an error code on Mass Storage. After installing the new drive and running the Hardware Test, the Mass Storage passed. I take that as a good sign.?
Before cracking the iBook back open, I was wanting to find out what all the problem may be and what things to check while I have it open since that is not that quick of an operation. I'm already assuming to check the connections on the drive. But if they weren't secure, would it still pass the Hardware Test?
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Oct 11, 2009
I have two USB cardreaders. One is (I think) a USB 1, unbranded. The other is a USB 2 branded Seitec). Our cameras both use Sony Memory Stick Pro Duos). They both of worked with both my wife and my iMacs under 10.5.11. Both machines (hers from 2006, mine an Intel Core 2 Duo from 2007) have been happily upgraded to SL 10.6.1... but now the cardreaders work with her machine, but not with mine. They don't mount on the desktop. I have tried various combinations ... attaching them through keyboard /back of iMac, powered USB hub. Sometimes they are recognised by System Profiler, sometimes not! Disk Utility seems unable to see them at all, so I can't get it to mount them.
However, when I leave the card in my camera and connect it direct to the keyboard (or whatever socket I choose!) the computer recognises the camera immediately I switch it on, and downloads quite happily
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Apr 27, 2012
Lion Recovery HD is suddenly showing up in Finder (Sidebar & Desktop), also in Disk Utility.What is going on? I don't want it to show up.
Info:
MacBook Pro, Mac OS X (10.7.3)
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Jul 17, 2009
I have a JVC Everio HD camcorder and am having some trouble importing the video. This morning, the camcorder was recognized by Finder and I could enter and view the files. However, the files are in .MOD/MP4 format so they would not import directly into iMovie.
This afternoon, I found a tutorial on how to convert the files so plugged my camcorder in again, only to find that Finder is no longer acknowledging it. It is recognized in iPhoto and Disk Utility.
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Aug 18, 2009
I recently deleted a boot camp partition and i did all that i was told to do.
When your on disk utility you have the hard drive type then "macintosh HD under it.
When i click the hard drive it shows i have 91 GB remaining on it
When i click macintosh HD it shows its only a 200GB hd when its a 250 and only has 69 gb free?
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Jun 21, 2012
My USB doesn't seem to be showing in Finder and Disk Utility. Why could this be?
Info:
Mac OS X (10.7.4)
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May 19, 2012
I have the "show detail" box checked but Disk Utility is not showing detail.It goes through verify and repair, says it is finished, but shows no files. I have never had No files need repair.My computer has been slow and erratic and usually running Disk Utility works, but not now.
Info:
iMac, Mac OS X (10.7.1)
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Apr 24, 2012
I have a 2TB Western Digital My Book Studio FW800 external that has 5 partitions, connected to my 2011 iMac. I had help doing the partitions and don't really remember the reasoning, but one is just for my SuperDuper! backup, one is Miscellaneous, one for movie clips off my camcorder, one for misc scanned photo's and one for my genealogy research. I back up using Time Machine to a Time Capsule and also to this WD hard drive with SuperDuper!
Recently I'm getting a pop up message that "Mac OS X can't repair the disk "Genealogy"'. And it needs to be reformatted. It's become a read only disk. When I look in Disk Utility it shows all the partitions as "Mac OS Extended (Journaled)" EXCEPT for the one in question. I also noticed that there are a lot of files with "date created" being the same date in 1969! These files may be letters I've written or photo's I added to that partition within the last few years.
I think I have to completely reformat the entire external hard drive to repair this, but I want to make sure. Because it's going to be a major hassle backing it all up to another external (having to get one first) and then figuring out how to make the files that have turned "read only" in that one partition, back to their original state! Does this sound right, that I have to reformat the entire external hard drive? And how do I get the read-only files back to their original state.
Info:
iMac, Mac OS X (10.7.3)
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Jun 27, 2014
I have a Seagate 1 TB Backup Plus Drive which was working perfectly fine until I plugged it into a USB hub. It detected it while in the hub and I was able to get files off of it, but when I ejected it from the hub and put it back into the USB slot on the computer it was not detected by finder. It shows up in the disk utility and I clicked verify and repair and it says:
Verify and Repair volume “Seagate Backup Plus Drive”
Checking file system
Volume repair complete.
Updating boot support partitions for the volume as required.
Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Is there any way to get this to work properly again? Or if not is there a way for me to recover my files on the external hard drive?
I have a Macbook PRO late 2011 running OS X Mavericks.
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Aug 6, 2010
I have an external 500GB Freecom USB HDD with two Data partitions on it (FAT32 and NTFS). With a Windows tool, I made the two partitions smaller in order to free up some space (ca. 200GB) for an additional Mac OS Extended (Journaled) partition. This partition I wanted to create with the Mac OSX 10.6.4 Disk Utility. When I pluged in my USB HDD in my new iMac it mounted the two partitions, NTFS and EXT32 and the Disk Utility tool also showed the free (unpartitioned, almost 200GB) space on the HDD. Then, I chose to create a new Mac OS Extended (Journaled) partition and let the tool do it. ...which I probably shouldn't have done. Disk utility stopped and showed an error message saying that it cannot read the partitions anymore and that it needs to be closed. No partitions can be mounted anymore since then on this HDD. Here is the logfile entry of Disk Utility (unfortunately, it's in German):............
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May 21, 2009
I'm trying to format my external harddrive with disk utility to Mac OS Extended (Journaled) but it keeps coming up with this error.
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Jul 28, 2009
I am desperately trying to burn a ISO file to a USB and external HD but Disk Utility does not want to. Instead I get the error message "Could not validate source - error 254". So there must be a problem with the source which is the ISO file.
I already tried setting the Partition Map Scheme to both Master Boot Record and GUID Partition Table. I also formatted the drive to FAT and HFS+. I cannot find the cause of this error. It clearly looks like Disk Utility does not like burning ISOs to USBs or HDs.
However, I really really need to this since I cannot burn ISOs with my SuperDrive which is also a common problem [URL]with my MacBook Pro.
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Sep 12, 2009
I installed SL two days ago and my LaCie firewire external has been working fine. i put it to sleep last night, and when I woke it up today, I got the warning telling me that I had disconnected it improperly (Which I hadn't, because the computer was asleep and the drive never was turned off). This has happened before and I usually am able to shut it off then turn it on again. But this time it won't mount. It shoes up in Disk Utility and System Profiler, but not in the Finder.I have tried switching firewire ports and restarting but to no avail.
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Nov 7, 2009
i just erased my external hard drive through disk utility my accident. I had VERY important files and the 1tb was full.
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May 25, 2010
My external hard drive has been corrupted and the error message is telling me to reformat it. However, through all the research I have done to find out how, everything I've found has told me to use Disk Utility to just erase everything on the disk to do this. When I try to do this, it tells me that I can't erase anything because the disk cannot be unnmounted. What should I do?
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Aug 10, 2010
Last night I noticed that the time machine icon on the menu bar had a stop sign or something and when i clicked back up now it says it can not back up. I verified the volume and recommends a repair but it says it can not repair.
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Aug 10, 2009
I have my imac apart right now and replaced the internal HD as it was not working. I assume the problem is the new one is not formatted with OSX, so from the INSTALL CD I opened the disk utility and see only one drive called "MEDIA".? Or is that just part of the install dvd that looks like a HD? In the system it shows as not formatted, 0 bytes. When selected in Partition it says :
"This voume is the startup volume and cannot be erased. Size 7.1 GB The disk is not writable and cannot be partitioned"
So i guess thats not my new HD I am seeing? Other than that there is only the two OSX install CD icons.
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Oct 11, 2010
I bought a WD My Passport 071A Media 1TB External Hard drive yesterday and was hoping to use it for my Mac and PC laptop. So I plugged it into my mac and it asked me if I wanted to use it for Time Machine and I said yes. It reformatted it and then I realised i wanted to partition it so I went to Disk Utility and split it into two partitions, one 50GB for Time Machine and another 950GB for my other storage, and made that FAT32 format. So I copied a song onto that partition and noticed it was copying really slow, so I copied the same song to the 50GB partition and my other 1TB non-portable hard drive which is also FAT32 and it was normal speed. So I thought I should try removing the 50GB partition and halfway through my computer froze and I had to reset it. Now my hard drive won't work in Mac or Windows and when I open Disk Utility, I see it there but when I click on partition, it freezes and I have to Force Quit the application.
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Dec 3, 2009
I bought a 1TB Iomega Prestige drive, it worked great for a few months. Started making loud clicking sounds. Iomega sent me a replacement drive (refurbished).
I am using it as my time machine backup in Leopard, so it was really just a matter of plugging it in, formating it with the OSX file system and setting it up for time machine.
When attempting to format from Disk Utility, I get an error (see screenshot).
(Additional info: I can access it and format it without any problems from Windows 7 based PC).
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Mar 11, 2010
My PowerBook G4 crashed and I need data from it. I already had bought an external drive and had begun loading some fotos and music. Now I'm at a friend's Mac, firewired and all, and the external drive (visible in the disk utility) isn't to be found.
I don't want to erase and reformat, obviously, ... can I drag it onto the desktop from the disk utility?
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Oct 17, 2010
I have an external hard drive that was used on a PC. I want to use it on a Mac. I went into disk utility and did an erase. (Extended Journaled and in security options changed it to zero out data). I can now use it on the Mac how ever it is telling me that there is 54.1 MB of used space. I want to have access to this. How do I do it?
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Mar 24, 2009
I'm trying to use my 500 GB external HD as solely a storage drive now whereas it used to be storage and backup, with separate partitions for each. I have deleted the backup partition (the first partition) successfully with Disk Utility, but how can I resize the remaining partition into the free space before it on the disk? I can't drag it or enter the desired size in the text box, it doesn't seem to want to get any larger. Is there any way to do this without purchasing ipartition? I have an old version from Tiger, but I'm not sure if that will work safely on leopard, and I do not want to lose my rather larger collection of ripped dvds on this external drive. Here's a screen shot of what i now see in disk utility.
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