External Hard Drive does not mount

My 2TB external hard drive does not mount and I cannot get it to. Have tried turning the hard drive off and then back on. No response. Any thoughts as to how I can get it to be recognized?

You can try doing a SMC reset, if it doesn't work the first time it's totally OK to reset the SMC several times.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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External hard drive does not mount after sleep

I am using a brand new Seagate 2 TB external hard drive for my backup drive. More often than not, when the computer goes to sleep, the icon for the drive is gone from the desktop when the computer wakes up. I have to unplug it from the computer and reconnect it, then it mounts and works fine. I have it plugged directly into the computer's USB port. The drive uses USB3. As far as I can tell, it does not exceed the power requirements of the USB port. It is the only external hard drive I am using at the moment.
I should note that the same thing was happening with my last hard drive. That was a Western Digital 250 GB drive with an independant power source connected by firewire.
I am running OS 10.6.8 on an Intel circa 2009 iMac. My external drives worked fine for years, and it seems in the last year or so is when this started happening.

r_dizzle wrote:
Another point of note is that both the HD and the keyboard are connected to the iMac through a 7 port USB hub.
I think this might be the issue. If the iMac is waking back up, it will likely be waking up this HUB, but the HUB might not be re-initialising the connection between OS X and the external drive or the keyboard.
After waking the iMac, if you unplug the external drive from the HUB, then plug it back in again, does OS X pick it up again? Have you tried plugging the external drive directly into the iMac and then testing what the result is?
If you read back on what you've said, you pointed out that you have a USB mouse that you use to wake the iMac from sleep. Is this mouse directly connected to the iMac? If so, it surely can't be a coincidence that a directly connected USB device can wake the iMac from sleep, but any USB devices connected to the iMac via a USB HUB cannot.
I would suggest you test the drive as it is directly connected to the iMac. I would complete the same test with the keyboard too. I think you'll find it's the USB HUB.
I hope this helps.

Fat32 External Hard Drive does NOT mount on Windows XP Pro under boot camp

I have a gateway 160gb portable external HDD. When it came pre-formatted in NTFS. It mounted on Windows XP under boot camp or Vmware Virtual machine very well.
I then formatted it under HFS+ to use it with superduper.
Now that I want to convert it back to NTFS. I formatted it under Fat32 so that windows can recognize it and I can format it again under NTFS.
The drive mounts fine on Mac OSX leopard but not on Windows XP (bootcamp or Vmware VM). Could someone help? I need this drive to be under NTFS so that I can store work related files which can only be run on Windows and some of the files are larger than 4gb.
Thank you

Under Disk Utility>Partition select anything other than 'Current' under 'Volume Scheme', then the format field will light. However, you should have been able to format under Windows Disk Management once it was online. See:
http://www.microsoft.com/windowsxp/using/setup/tips/advanced/ntfs.mspx

External Hard Drive does not mount after connecting to airport

Hello,
I tried finding a solution to this problem already, but people that posted were having issues seeing the drive connected to the airport, while I am having the opposite problem.
After I tried connecting my USB drive my new airport extreme and it worked there and I tested speed and whatnot, I disconnected it and plugged it back into my iMac and now it will not show up anywhere, and will only show up when connected to the airport.
Basically I want my drive that was connected to the airport to connect to my mac again because it is not working.

Zerimar wrote:
After I tried connecting my USB drive my new airport extreme and it worked there and I tested speed and whatnot, I disconnected it and plugged it back into my iMac and now it will not show up anywhere, and will only show up when connected to the airport.
To clarify, when you connect that drive directly to your iMac it doesn't appear on the Desktop? Do you have Finder preferences set (in the General tab) to show "External disks"? Do you see the drive in Disk Utility?

My external hard drive does not show up on my desktop

My external hard drive does not show up on my dest top but, does shows in my Windows (vmware fusion) end although I can't see it ob my desktop but, I can eject it properly like any external drive. I have connected it to my windows and ejected properly (per the suggestion of someone on this forum) but, it still doesn't show on my Mac. I see the blue light and hear it running though. I have looked for it in disk utility but, still can find it. I have changed the cable and it still did not show on my Mac. I connected another external drive and that showed up on my desktop.Any help????

if it is NTFS then you need Paragon Software NTFS for Mac.
NTFS volumes are suppose to be read only but in practice external drives don't always mount or work.
If it is not NTFS then you need more details. Need more anyway.
PS: this is not a MacBook area, it is Mac 65lbs tower related forum.

External Hard Drive does not work with Lion

Hi
My External Hard Drive does not work with Lion this message appears:
NTFS-3G could not mount /dev/disk1s1
at /Volumes/My Passport because the following problem occurred:
/Library/Filesystems/fusefs.fs/Support/fusefs.kext failed to load - (libkern/kext) link error; check the system/kernel logs for errors or try kextutil(8).
the MacFUSE file system is not available (71)
can anyone help?

Hi,
See this Discussion:
https://discussions.apple.com/thread/3191198?start=0&tstart=0
Cheers,

External hard drive does not show up

External hard drive does not show up in imovie.

Hi,
Welcome to the Discussions.
The drive's directory is damaged and as you found Disk Utility isn't equipped to repair it. You need Disk Warrior or Tech Tool Pro.
John

My external hard drive does not show when I am trying to open a document in Office Org??

My external hard drive does not show when I am trying to open a document in Office Org?? When looking in the about IMAC system support it shows as being connected. Any ideas??

Does the drive show up under 'Devices' in Finder?

External hard drive does not shut down

Hello, When my mini mac goes to sleep my samsung external hard drive does not shut down or dismount properly. when i wake computer i have a error message stating improperly ejected hard drive. It also does not reconize HD until I disconnect and reconnet??? PLEASE HELP Thank you

My Mini was doing the same thing until I reset the PRAM. With four external drives. They would stop inadvertently with an "improperly ejected" error. Granted two of the drives went bad (6 and 7 years old) but a brand spanking new Seagate and a 3 year old Hitachi drive doing the same. Haven't seen the error since resetting the PRAM.
If you don't know how to do that, Reboot while holding the Cmd+Opt+P+R keys until your hear the startup chime three times and then release the keys.

HT3275 Time Machine says my external hard drive does not have enough

Time Machine says my external hard drive does not have enough space for the current backup. It needs 34 G out of a 250G hard drive. All that is on the drive is earlier backups. I recently added memory, which may confuse Time Machine into thinking it is a new computer. How can I erase old backups and complete this one?

Walter Goodman wrote:
Time Machine says my external hard drive does not have enough space for the current backup. It needs 34 G out of a 250G hard drive. All that is on the drive is earlier backups.
See #C4 in Time Machine - Troubleshooting.
If that doesn't clear it up, how much data is on your Mac? If TM is only trying to back-up 34 GB, it should be able to delete old backups to do that (assuming you're running Lion).
It sounds like your backups may be corrupted. Try to repair them, per #A5 in Time Machine - Troubleshooting.
I recently added memory, which may confuse Time Machine into thinking it is a new computer.
If that's all you did, no.
How can I erase old backups and complete this one?
Just erase the drive per #1 or #2 of Using Disk Utility.

External Hard Drive will not mount after upgrading to Yosemite

After upgrading to Yosemite, my external 3TB hard drive will not mount... can't see in Finder, but does appear in Disk Utility. Follow steps to Repair disk, but get a message that D.U. cannot repair disk.

See mount section.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk

External Hard Drive does not show up in Finder

My external hard drive is not showing up in Finder.
It shows up in Disc Utility, but I do not have access to it. I have tried the following:
command-shift c, nothing happens
confirmed in Preferences/General that external hard drive was checked
tried another cable
tried another port on the back of the external drive
tried to connect through the USB port
re-started, etc.

zone-5 wrote:
I have same problem after installing OS 10.5.8. Disk utility sees the hard drive, the computer does not. Disk utility says invalid node structure. Volume check failed. Filesystem verify or repair failed.
That means the directory is corrupt. If you have a heavy-duty 3rd-party disk repair app, such as +Disk Warrior,+ it may be able to fix it. Otherwise, your only option is to erase and reformat the disk. They're not cheap -- Disk Warrior is about $100. And for Leopard, you need version 4.1.1 or 4.2.
I have not been able to figure out how to start a new topic here, but did find this discussion, which fits me fairly close.
Just above the list of topics, on the left, is a +Post New Topic+ option.

External hard-drive does not reconnect after sleep

Hi everyone
I am trying to use my Energy Saver to SLEEP my iMac after 1 hour. It goes to sleep no problem, but on wake-up, my external USB hard drive does not reconnect. There is also an error message that I didn't disconnect the drive properly. I fear this may be one of Mac OS X's "features". Has anyone encountered the same thing?
On a side note, I also find that my USB keyboard does not always reconnect as well. I use a windows USB mouse that I have connected to wake it from sleep, however my USB keyboard (the small one for Macs), sometimes does not allow me to type unless I unplug it and back in.
Another point of note is that both the HD and the keyboard are connected to the iMac through a 7 port USB hub.

r_dizzle wrote:
Another point of note is that both the HD and the keyboard are connected to the iMac through a 7 port USB hub.
I think this might be the issue. If the iMac is waking back up, it will likely be waking up this HUB, but the HUB might not be re-initialising the connection between OS X and the external drive or the keyboard.
After waking the iMac, if you unplug the external drive from the HUB, then plug it back in again, does OS X pick it up again? Have you tried plugging the external drive directly into the iMac and then testing what the result is?
If you read back on what you've said, you pointed out that you have a USB mouse that you use to wake the iMac from sleep. Is this mouse directly connected to the iMac? If so, it surely can't be a coincidence that a directly connected USB device can wake the iMac from sleep, but any USB devices connected to the iMac via a USB HUB cannot.
I would suggest you test the drive as it is directly connected to the iMac. I would complete the same test with the keyboard too. I think you'll find it's the USB HUB.
I hope this helps.

My external hard drive will not mount on the desktop?

My external hard drive no longer mounts on my desktop, the hard drive has been checked & is working-has anyone ideas?

Hello cuckoo55,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Mac OS X v10.6: How to show your hard drive icon on the desktop
http://support.apple.com/kb/HT3746
In the Finder, choose Preferences from the Finder menu.
Click the General icon on the toolbar.
Select "Hard disks" in the "Show these items on the desktop:" section.
Close the Finder Preferences window.
Best of luck,
Mario

External Hard drive will not mount on desktop

I have a 17" Powerbook G4 that has replaced a broken iBook G4. I've been using a Western Digital MyBook Pro Edition as a secondary drive for my multimedia as well as my iTunes Library. It worked fine on the old iBook.
When I plug it into the Powerbook, using either USB2 or Firewire 800, it will not mount to the desktop. It DOES however appear in the System Profiler as "External HD Button and Lights". The drive is formatted for FAT32 and works fine on my Windows XP desktop machine, so I know the drive functions mechanically. A different hard drive, a Maxtor mounts to the desktop fine using USB2, so it isn't a bus issue.
This is driving me nuts. I LOVE this computer, but I have WAY more invested in music than the cost of the computer.
Thanks in advance.
Message was edited by: hempomatic

It took a while to figure it out but apparently there was a conflict with bluetooth. I disabled it and all is well.

External Hard Drive does not mount

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