Software :: External Hard Drive Unmount Unexpectedly

Jul 5, 2008

G4 Dual 867 2g OS10.5.4. I have 2 external drives (Lacie 200g USB - Western Digital 120g USB) that unmount unexpectedly, sometimes they remount.

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Hardware :: External USB Hard Drive Unmount Itself?

Aug 6, 2008

I have a 2.5" hard drive connected via USB to my MacBook that keeps unmounting itself. This happens under some (what seems to be) undetermined amount of time, the drive will all of a sudden unmount itself and disappear from the Finder, Disk Utility, et al.

Is there some fix, setting or work around for this? Very annoying. If not, is there a way to re-mount the hard drive without turning it off then on or reconnecting the USB cable?

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OS X Mountain Lion :: Cannot Unmount Or Erase Partitioned External Hard Drive

Jun 21, 2014

I replaced a 1 TB external drive partiotioned in 2 with a 3 TB extrnal drive run/store my corbon copy cloner back up and time machine.

The 3 TB drive was successfully partitioned through the disk utility and both back ups are installed and the initial back up is complete.

My question is about the 1 TB drive.  I want to completely erase all data from the drive in order to use it for a different use. 

Using disk utility one of the partitions deleted without incident when following the same protocol the second partition produced error messages.

Volume erase failed 

Volume Erase failed with the error:

Couldn’t unmount disk.

If I try to eject the disk

It says it will not eject becaus e a program may be using it...

The only program that utilized this partition is Carbon Copy Cloner which is not being utilized on the new 3TB drive.

I do not see where there is a option to have more than on disk chosen for this purpose so am unsure why the disk utility is seeing the old partion as still in use.

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MacBook :: OS X Mavericks (10.9.4) Can't Erase / Partition Or Unmount External Hard Drive

Aug 28, 2014

I have a MacBook Pro running OSx 10.9.4 and have been successfully using Time Machine with a WD My Passport External Hard Drive for a while.  Now (after 10 days with a successful back-up), the computer will not back-up.  I have gone into disk utility and tried to erase, partition, and/or repair the disk, but repeatedly get error messages - it can't erase the disk, re-partition the disk  or unmount the disk. 

Info:
MacBook Pro (13-inch Mid 2010), OS X Mavericks (10.9.4), External Hard Drive

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Mac Pro :: External Hard Disk Mounts Again After Unmount?

Apr 14, 2012

My Mac Pro [with 4 internal disks, 2 External Disks (Sata Raid 0), and several external FireWire disks and a Voyager disk station] has a little problem with letting externals go Since a few weeks I have a problem with unmounting my externals. After unmount, the unmounted disk will mount again immediately.No time to disconnect cables and/or power. Hinders disk management, backup, and simple disconnecting disks. It only happens with disks (FireWire 400/800/ SATA and USB alike). USB sticks work fine.

Info:
Mac Pro, Mac OS X (10.7.3)

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Software :: Failed To Erase Hard Drive And Cannot Unmount

Sep 26, 2009

I want to carbon copy my bootable external drive to my main internal bootable hard drive so I tried to use Disk Utility to erase it but it will indicate that it failed and can't unmount. When I tried to manually unmount by dragging it to the trash it indicated that it is in use. I can't understand why it's in use since I booted from the external drive which I wanted to the copy to the internal drive.

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PowerPC :: Hard Drive Not Working / Repair Volume Failed Could Not Unmount Disk

Jul 17, 2009

So so annoyed right now. Today my 12" G4 powerbook started to become slow, lots of spinning wheel, delayed menus etc. I checked file permissions, rebooted and it just kept on getting slower. Eventually it wouldn't get past the white apple screen.

I booted off the Tiger DVD and ran disk utility to fix and repair permissions again. It wouldn't let me repair the disk as I kept getting this error:

'Repair volume failed with error could not unmount disk'

I had to reboot again, and eventually my hard disk no longer appears in Disk Utility. I tried to boot into safe mode and get this:

'"I0ATAController device blocking bus
I0ATAController device blocking bus
I0ATAController device blocking bus
I0ATAController device blocking bus
I0ATAController device blocking bus"

So now I pretty much can't do anything with it. Failed Hard Drive?

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MacBook Pro :: How To Unmount A Disc / So Disc Utility Can Repair Corrupt Hard Drive

May 12, 2012

In trying to repair my hard drive, which disc utility said was corrupt, it stopped repairing it because it could not unmount the disc?I booted my macbook pro from my backup hard drive.

Info:
macbook pro, Mac OS X (10.6.8)

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Intel Mac :: Erase Hard Drive Mac OS X (LION) "Couldn't Unmount Disk"

Apr 15, 2012

I've just transferred my data to a new computer and now need to erase the hard drive on my old one.. I've tried Disk Utility, increased the security, and tried 'erase' but I keep getting an error message "couldn't unmount disk". I've gone into Partitions and tried deleting the HD there as well but I get the same message. I just want to get the computer securely wiped and would like to keep Lion as the operating system. 

Info:
Macbook 2GB ram, Mac OS X (10.4.9)

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Intel Mac :: It Ejects External Hard Drives Unexpectedly

Jun 3, 2012

I am working along and all of a sudden my external hard drives are ejected for no apparent reason.

Info:iMac, Mac OS X (10.6.8), 4 GB Ram

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MacBook Pro :: External Drive Ejects Unexpectedly?

Apr 16, 2012

I am trying to use a WD Passport 1T external hard drive with my MacBook Pro but everytime I use the USB port it is recognized but shortly afterwards it ejects itelf from my system. How can I prevent this?

Info:
Mac OS X (10.7.3)

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OS X :: Formatting External HD - Could Not Unmount Disk

Aug 19, 2008

When I try to format my Western Digital "MyBook" external drive, I get an error. It says "could not unmount the disk." What does this mean, and how do I fix it? Also, what's the difference between Mac OS Extended (Journaled) and not journaled?

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IMac :: Can't Unmount New External Harddrive

Jan 27, 2009

Unable to Use TIme Machine to backup a new Western Dig external 1 TB drive. It is connected through an adaptor to my Firewire 800 using a Firewire 400 with adaptor. I cant dismount the drive to reformat it to MAC using disk format utility.

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Applications :: If I Delete Files Off My Internal Hard Drive, Will It Still Be On My External Hard Drive

Nov 12, 2009

if i delete files off my internal hard drive (Macintosh HD), will it still be on my external hard drive or will it just add to it?

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MacBook Pro :: Booted From USB Drive / Cannot Unmount Primary Drive To Erase

Aug 28, 2014

I've been having problems booting into my OSX partition. At the time it started I wasn't using my Macbook Pro (Late 2009) very often so whenever I needed I just booted up into my BOOTCAMP partition. Anyways, I decided to finally stop being lazy and do a clean install. There's nothing on either partition of the same hard drive that I want. I put together a bootable USB drive and boot from it. From here I go to the Disk Utility and try to erase the entire drive. It gives me this error: URL....

Now, that's not a screenshot from my mac but its the exact same error. Anyways, I've tried to find something on point but I just can't. Some posts have stated that the hard drive is broken, but if that's the case why can I start up the BOOTCAMP partition of the exact same drive flawlessly? I can even manipulate files on the OSX partition from Windows 7. 

Info:
MacBook Pro, OS X Mountain Lion (10.8.1)

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OS X :: Unable To Eject / Unmount External HD Properly

Dec 10, 2008

My external hard drives simply refuses to eject/un-mount, and I've done everything I can think of to terminate any processes and/or applications that may be using the drive and preventing it from being ejected properly, but I haven't had any success. Is there some Mac-Jedi way of going about isolating what might be preventing this drive from ejecting properly? I've scoured the activity monitor but can't figure out what might be preventing the drive from ejecting?

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OS X :: How To Clon And Copy The Content From One An External Hard Drive To New Hard Drive

Oct 14, 2009

with cloning/copying the content one an external hard drive onto a new external hard drive. Basically, I have a 500GB FW400 drive which I use to store my media files. It's full, so I purchased a 1TB FW800 drive to replace it. Obviously, I thought I could simply copy and paste the media files from the old drive to the new one.I cannot copy the media files to my internal drive first as my internal drive is only 250GB and nearly full itself.I have used Disk Utility to attempt to close the old drive to the new drive, but keep getting "insufficient space" errors.

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MacBook Pro :: Cloning Entire Hard Drive To An External Hard Drive

Mar 31, 2012

Recently I bought 2 identical WD Scorpio Blue 1TB hard drives for my macbook pro 13 inch 2010. My aim is to replace the internal hard drive with one of the two I just purchased and use it as my system drive with Lion, Windows and Data partitions. And for the other hard drive I want to use it as a full disk back up for the internal drive (now 1TB hard drive).After I was done with setting up both windows and mac and data transfer, when I booedt into the recovery partition from the internal drive to clone the drive to the external drive, the disk utility gave me this error (Could not validate source - error 254). I also tried using Carbon Copy Cloner but it only could clone partitions, not the entire drive. Yesterday I downloaded a copy of Clonezilla. It worked fine until it had to clone an exFAT partition (my data partition). The exFAT partition appeared as 'RAW' partition in clonezilla. As a result, the whole partition appeared to be full and clonezilla had to copy every single blocks of data in that partition and the estimated time remaining was about 30 hours. So clonezilla is out too. Just want to ask if there is any program/application (bootable or not) which allows can do a full disk clone to an external hard drive.

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OS X :: Automatically Unmount External HD After Time Machine Backup

Dec 1, 2010

I want to plug in my computer into my USB dock, automatically mount my external HD, have TimeMachine do its thing automatically (so far, so good), but then immediately after the backup finishes, I want the computer to automatically unmount the HD. This will allow me to close the laptop and go somewhere without having to constantly eject the HD everytime I unplug the computer.

So - what I need is a program / script / etc that will tell the computer to eject the drive as soon as TimeMachine is done backing up.

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Hardware :: Unable To Reapair External Disk / Unmount Error

Jun 22, 2008

I have a Western Digital 500gb external hard drive, with 2 partitions, 'KAINARC' and 'JUNGLEMAC', connected to my Intelmac (Tiger 10.4.11 via my firewire, i have connected via usb but the problem is still the same). I may have shut down the drive improperly to cause this situation.

KAINARC now appears on my desktop, but the partition of JUNGLEMAC does not. I go to disk utility and both partitions are visable, KAINARC is mounted but JUNGLEMAC is not. I cannot mount JUNGLEMAC.

When i try to verify and repair the partition I get the message:

Verify and Repair disk �JUNGLEMAC�
Error: The underlying task reported failure on exit

1 non HFS volume checked
1 volume could not be repaired because of an error

So I try to verify and repair the partition KAINARC but get this message:

Verify and Repair disk �KAINARC�
Repairing disk failed with error Could not unmount disk



So I have opened diskwarrior (unbelievably long time to start up and scan disks) in the hope of fixing the hard drive, but when i try to repair I get the error message 'unable to unmount KAINARC'.

I have tried other repair/recover programs but get the same message: 'Could not unmount disk KAINARC'. Im asuming that to fix the hard drive it has to be able to unmount KAINARC.

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IMac PPC :: Make Hard Drive Into An External Hard Drive

Mar 1, 2012

I've had a lot of problems with my iMac G5 power supply and since I have newer computers I've decided to get rid of this computer. 

I want to save the hard drive and put it in a case, then use it as an external drive on my other Macs. 

What sort of case do I need to shop for? Should I look for SATA or what exactly is the proper nomenclature. 

Is USB 2 the preferred choice, or Firewire, or what? Is there a USB 3? I use a mid-2010 27 inch iMac with the intel processor, and I needed to buy an adapter to use my older Firewire external drive. Is Firewire a dodo? 

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Power Mac :: Back Up Hard Drive To An External Hard Drive?

Apr 12, 2012

I need to back up hard drive to an external hard drive. How can I do this automactically? 

Powermac g5
10.4.11
tiger

Info:
Mac OS X (10.4.11)

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PowerPC :: G-5 Quad With An External Dvd Drive And A External Hard Drive And 2gb Of Ram?

Aug 9, 2006

i have a power mac g-5 quad with an external dvd drive and a external hard drive and 2gb of ram. on my ext. hard drive i downloaded mac the ripper and that is where i put all my dvds, now today on my pmac i was using mac the ripper, popcorn, itunes, safari all at once and it froze up on me?why? could the ram be an issue? how may programs can i use at once with my pmac?

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Mac Pro :: Internal External Hard Vs External Hard Drive

Jul 12, 2010

Looking for opinions or comparisons on performance between an internal mac hard drive vs an external firewire 800 hard drive or better. Is the performance on an internal MP drive or iMac internal drive much faster than connecting to a firewire 800 drive? I'm sure it depends on the drive, I'm wondering about apple factory installed internal drive vs say a WD external firewire 800

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Applications :: Installing ITunes On External Hard Drive / Playing Music From External Hdd?

Aug 19, 2007

In other words... I have moved my music library to the external hard drive, as per an earlier thread I read here on the forums. It worked like quite well. Now that it is working perfectly, I am having a hard time leaving well enough alone. It is never a good idea for me to think too much...Can itunes be installed and run on/from an external hard drive? If so, how?

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MacBook Pro :: Erase Corrupted SSD Internal Drive - Can't Unmount Disk

Dec 6, 2014

I'm trying to erase my SSD internal drive that is corrupted software (Yosemite).I'm booting from an external with 20GB Yosemite OS & 480GB that contains files I've dragged off the internal SSD.I'm getting the error:Volume Erase failed with the error:Couldn’t unmount disk.How can I get around this?

Info:
MacBook Pro, OS X Yosemite (10.10), 13"

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IMac :: External Hard Drive Or External Dvd Drive

Dec 31, 2009

my mac has a pioneer dvd drive in it and it wont read my dvd+r dl and I am wanting to burn a mac os 10.5.dmg to it and install 10.5 but the dang thing is ejecting it. So what should I do to get it to work get the external dvd and run it from it or get a external hard drive and try it that way.

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Applications :: Running Itunes On External Hard Drive / Internal Drive Space Not Enough

Jan 2, 2011

This is what im trying to do. I have a macbook with 120gb hard drive. thats not enough space from my music collection. So i was wondering how to make itunes run off a external hard drive. I looked around and found was for a PC.

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Hardware :: Q950 Hard Drive & Connect External Drive To IBook Or Dell?

Jan 29, 2008

I have an elderly Q950 with an external hard drive with everything backed up onto it. The external drive is a Micronet ADV1000E, with a sticker on the back saying it's Macintosh or PC compatible. I also have an iBook laptop, & PC Dell Inspiron 1300 laptop. As I have the 2 laptops, the Quadra hadn't been switched on for maybe one year. On the weekend I tried to get it to boot up (with & without the external drive switched on), but all it does is display a grey screen with an image of a 3.5" disk with a '?' in the middle. If I start up from a Norton 3.5" disk it still can't find the external or internal drive. If I try booting up with my finger in the shift key it doesn't want to know.

1. Any idea why the Quadra isn't seeing either the external or internal drive & what can I try to do?
2. Is there any way I can connect my external drive to either my iBook or Dell? At the moment I have no cables to connect the old & new - are cables available & if so any idea where from? I've looked high & low but so far no joy.
3. Is it possible to remove the hard drive from the Quadra or the external drive & put in an external drive enclosure, then connect that to either laptop? I see there are drive enclosures available which are Mac & pc compatible. This by the way would be a major undertaking for me. I'm by no means a computer dunce but would be wary of trying it.

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Hardware :: Won't Show Up G-Tech G-Drive (500GB) External Hard Drive

Jan 16, 2008

when I went into the "get info" window for the G-Drive and switched the ownership/permissions dropdown from "read/write" to "no access". When I tried to switch it back to read/write, it would say read/write in the dropdown, but then I'd try to access the g-drive and I'd only get to the first set of folders--when I'd click on a folder, there would appear to be nothing in it. (Not sure if this is really related to my current problem.)
I then tried ejecting and remounting the drive, but it didn't show up on my desktop. Stupidly, I assumed my computer didn't recognize it at all and unplugged the firewire without ejecting thru disk utility. When I did this I got the device removal error.
I then plugged the firewire back in and tried repairing the disk in disk utility, but it said it didn't need repair. When I click on the G-Drive in disk utility the info at the bottom says:

Mount Point :/Volumes/G-DRIVECapacity :465.6 GB (499,973,603,328 Bytes)
Format :Mac OS ExtendedAvailable :
Owners Enabled :NoUsed :
Number of Folders :0Number of Files :0

0 Files! I'm worried about losing all my stuff! I then tried DiskWarrior (v4.0). When I first opened it I think the info at the bottom said "This disk is a Mac OS Extended disk. This disk does NOT appear on the desktop." I'm not quite sure about that "not" b/c after rebuilding the directory of the G-DRIVE I know it now says "This disk does appear on the desktop." Anyway, it's definitely not appearing on my desktop. After building the directory it said "All file and folder data was easily located. Comparison of the original and replacement directories indicate that there will be changes to the number, the contents and/or the attributes of the files and folders." And later: "19 files (and 2 folders) had a directory entry w/ an incorrect text encoding value that was repaired." And:

Disk Info:
Files: 51,646
Folders: 18, 493
Free Space: 65.42GB
(etc)

I then clicked "Replace" whereupon it said it was successfully replace. But still it did not appear on the desktop even after ejecting, remounting, rebooting computer, etc.

If anyone has any advice I'd really appreciate it. I'm pretty desperate here! Thanks!

(FYI I already tried going into the Finder permissions and unclicking and reclicking the box for showing disks on the desktop. Also, I plan on getting DataRescueII in case that's necessary, but i hope it isn't)

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