External drive does not always mount?

I have a 1 terrabyte Lacie external FW drive that does not always mount. Are there any issues with Tiger recognizing such a large drive? Is there anything I can do to make it mount better?

hello and welcome to Apple Discussions!
You might try using Disk Utility, (Applications/Utilities) and see if the Lacie mounts in the panel on the left under MacintoshHD. If it does mount, you can try to repair it using Disk Utility.
Are you sure you have your Finder preferences set correctly? Click a clear area on your Desktop then in the Menu click Finder>Preferences. Under, "Show These Items" on the Desktop, make sure you have first three boxes checked.
Also, run Disk Utility and Repair Permissions. That can fix a myriad of bugs.
Carolyn

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TM drive does not always mount when reconnected

Forgive me if this has been covered, but I could not find it in the archive.
I am using a Fantom 500GB drive for backup from my laptop. Every few days, when I reconnect the drive, it will not mount and backups will not happen. The drive is both Firewire and USB - I generally use Firewire. I have tried repowering the drive, unplugging and reconnecting in all the various permutations, and the drive will not mount. The two things that will make it mount are 1) reboot the computer, or 2) connect the USB cable (although, the Firewire will still not work until after a reboot). Any ideas?
Thanks,
Andy

Andy,
I was just reading some reviews on Newegg dot com for the Fantom Titanium-II TFD500U16 500GB 7200 RPM 16MB Cache USB 2.0 External Hard Drive which I presume is the one you have purchased. There are a lot of negative reviews which suggests that it should be avoided. Read them for yourself.
You get what you pay for and for my hard earn dollar I would be wanting a reliable interface and a reliable mechanism. Seems to me that one or both of those are not up to scratch in your case. There are a lot of good quality Firewire/USB devices on the market such as those from OWC aka Other World Computing. Spend the dollars and buy quality and you wont regret it. You have the best computer on the market with the best OS so pamper it a bit.
Cheers
Chris

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I inadvertently right clicked the FCPX icon in the Dock and found this, Problem solved!
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Hello,
My external drive does not show up in finder. But it appaers in DISK UTILITY. When I tried to repair it, it said:
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Can you please help me?

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I just applied the lastest update today and now my external drive does not show up in Time Machine. It does show up in Finder.

Gracias Sir Kappy, These instructions didn't include Yosemite, but I followed the closest and used Mavericks instructions and the command-R was the key, which I suppose means 'restore?' Nothing is explained as we should all be able to read the programmers minds by now...
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Running Time Machine for the first time, how that I make sure that some information I have in the external drive does not get erase in the prosess

Running Time Machine for the first time, how that I make sure that some information I have in the external drive does not get erase in the prosess

1. Quit iPhoto
2. Copy the iPhoto Library from your Pictures Folder to the External Disk.
3. Hold down the option (or alt) key while launching iPhoto. From the resulting menu select 'Choose Library' and navigate to the new location. From that point on this will be the default location of your library.
4. Test the library and when you're sure all is well, trash the one on your internal HD to free up space.
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External Drive does not mount with Firewire but is ok with USB !

Since 10.4.4 my external drive is no more recognized using firewire, but it mounts perfectly with USB
Using FW request me to reinitialize the disk, but then, the apple disk utility it is unable to reformat!
then I unplug FW , sets USB and everything is ok!
I connected the drive to my old IMac G4 700 and evrything is fine, FW and USB, using the same drive, using the same cable. I did repeat the test many times it is always ok with the old mac and it never mounts with FW on my newer Ibook.
I did reset the openfirmware but that was not successfull!
Then I brought both iBook and the faulty Drive to a friend (he owns a powerbook and also an external drive)
we verified that my drive does not mount on his powerbook G4 12" using FW and is ok with USB.
Then he tried his external drive and was very surprised to find the same fault with his drive and his PB using FW. (as for me everything is ok with USB!)
We are both very puzzled, our drives did work well before, (before 10.4.4 , and 10.4.5 did not improve!)
and now, with firewire,disks never mounts..
In addition I tried with the same cable to alternatively start, using the target mode, the ibook and the imac. For each test they were both recognized as external drives as they should..
So to try to sum up
- Disk mount ok with USB (1 or 2)
- Disk is no more recoknized with FW (but it was before with the exact same hadrware)
- FW Cable seems to be ok as targuet mode works properly
has anybody any idee?
It would be very munch appreciated..
thanks a lot for having read this long post..
External hard drive P/N:
the western digit disk 160G is in an enclosure referenced
Prolific PL3507 Combo Device
I tried to exchange the disk of this box with an old maxtor with the same bad result!
IbookG4 1.2 & IMac G4 700 Mac OS X (10.4.4)

Hi Andre, I can't remember except to say that it was mounting fine with tiger and I was able to copy files to it for backup purposes.
I just hooked it up to a PC and windows tells me the drive is not formatted. That's not a good sign, and this was stupid: I think I had the drive hooked up to my Mac Pro during the upgrade.
Idiotic, granted. But this was an upgrade, not a full install and I maybe was trusting in Apple's ability not to do extraneous stuff during an install like windows does. Oh well...
I appreciate any further ideas. Many Thanks, Frank.

External drive does not mount on boot

I have a Toshiba MK5055GSX 500GB external drive which I use for Time Machine but for some reason it does not automatically mount from a cold boot. Before I started to use it for Time Machine (it was formatted as NTFS at the time) I had not problems with it. All other external drives correctly mount on boot.
I had thought it might be a problem with the drive itself but if I disconnect it and reconnect it with my iMac running it mounts every time without fail. If I reboot after it has mounted it also mounts at boot. Only if I start the iMac using the power button with the drive already connected does it fail to mount and the results are consistently repeatable.
Does anyone have any ideas why this might be happening and how to fix it?

Does this drive have a separate power brick? If it does I suggest using it to see if that fixes the problem. If the enclosure has both USB and Firewire ports try using the drive on a Firewire port instead of a USB port.
It sounds like the drive is not spinning up early enough in the startup process to be detected.
Not knowing how you prepared the drive for the Mac, you should re-prep the drive as follows:
Extended Hard Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID (for Intel Macs) or APM (for PPC Macs) then click on the OK button. Click on the Partition button and wait until the process has completed.
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 can take up to several hours depending upon the drive size.

External Drive does not mount on desktop

Hi,
I did a Leopard upgrade and most everything went smoothly. But when I boot, Leopard pops up a window telling me that a disk I inserted is unreadable (it took me a time or two to realize it WAS referring to my USB 2.0 external hard drive).
It gives me the option to ignore, initialize or eject. Thus my hard drive won't mount on my desktop. It DOES show up in Disk Utility, however, so maybe there is hope.
So what are my options? Am I looking at burning DVDs all day so I can re-initialize or reformat this drive for Leopard?
I appreciate any help, and I did a lot of searching on this topic, so I'm aware that there may not be any solutions as of yet.
Many Thanks, Frank B.

Hi Andre, I can't remember except to say that it was mounting fine with tiger and I was able to copy files to it for backup purposes.
I just hooked it up to a PC and windows tells me the drive is not formatted. That's not a good sign, and this was stupid: I think I had the drive hooked up to my Mac Pro during the upgrade.
Idiotic, granted. But this was an upgrade, not a full install and I maybe was trusting in Apple's ability not to do extraneous stuff during an install like windows does. Oh well...
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I have a Dell external drive which is Hitachi Model 72323. I was happy with it until I used bit locker to add a password on it. After that it worked a couple of times then my computer will not recognize the drive again. It does not even show up in my device
manager. I plugged the device into many other computers and it is recognized promptly. However, another Dell that I have will only recognize it once in a while. I don't understand why it is not showing up in the device manager. Please help.

Hi,
I suggest you first install latest Windows Updates for your pc.
Reinstall USB controllers.
Click Start, then type device manager in the Search box, then click
Device Manager.
Expand Universal Serial Bus controllers. Right click a device and click
Uninstall. Repeat for each device.
Once complete, restart your computer. Your USB controllers will automatically install.
Update the BIOS, install your motherboard's latest chipset drivers. you need to view the manufacture website and the user manual
Meanwhile, please refer to the following article if you need some more information:
Error: “USB Device not recognized” when you try to access a USB external hard drive.
http://support.microsoft.com/kb/2654149
Yolanda Zhu
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Hello,
I have downloaded from a PC to an external drive my windows mail files (sent, inbox, etc). I can view the files on the PC by changing headers to add senders name, etc.
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sig thanks for trying to help.

External Drive Does not show any file in finder

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External Hard Drive connected to AEBS does not auto mount

Just upgraded from Tiger 10.4.11 to Leopard 10.5.5. I have a AEBS running 5.3.2 airport utility with a LaCie HD connected to it.
In Tiger, my external hard drive would auto mount onto the desktop every time the computer turned on or woke up from sleeping etc.
In Leopard, my external drive will not auto mount. It does not show up in the sidebar under devices. It does not show up in the disk utility. To access it, I have to go the the finder sidebar, select my AEBS under shared, then select my HD. Also, I did check show connected servers and external disk on the desktop in the finder preferences. Also, not sure if this matters but the icon on my external drive on my desktop is the blue drive with three people holding hands and not the brighter blue one with the wireless signal logo.
In tiger my external HD basically acted like any other folder that was always there and not like a networked drive that I had to go and connect to. I want to go back to that. I heard this has to do with leopord no longer having the airdisk utility??
thanks

Try making an alias of one of the top-level folders in your external (AEBS-connected) drive, drag it to the desktop, and then put it in your Login Items.
--> System Preferences/Accounts/Login Items
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External drive does not always mount?

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