External MyBook does not mount

Hi all-- a tore open my WD MyBook to replace the internal disk, and after piecing it back together, it no longer mounts in Finder. Disk Utility is also blind to it-- in fact the only thing that will see it at all is System Profiler.
Any thoughts?

I have read elsewhere that the FW 800 port on the iMac 24 can be a bit tricky. You may want to make sure you have a good connection.
I formatted mine out of the box which is just good practice and because I wanted to make a partition bootable/clone.
Powering on/off wont make a difference.
I don't know what you mean by uncheck/check ports for firewire. There are no such prefs in OSX.
Repairing permissions has nothing to do with hardware.
You only plug the FW 800 plug into the FW 800 port on the iMac. You use the other ports on the drive to plug other drives in on a daisy chain.
Go into drive utility and see if it shows up there for formatting. If not, then you have a bad cable. Try the regular FW 400 port and hook up that way. The 400 and 800 share the same bridge. If that doesn't work, and another drive does, then the FW bus on the drive is dead.

Similar Messages

My external HD does not mount despite it appears on Disk Utility

I have been using an external HD to keep my video library. Just this week I updated my library and everything was OK, but when I tried to see the videos on my mediaplayer the disk didn't appear. I connected it again to my iMac but now the external HD does not mount. I tried Disk Utility, the disk appear gray on the sidebar but it doesn't mount. I run Repair but I get the b-tree node size error and the disk still does not mount.
Please help!!!!

If DiskWarrior can't fix it, you might try Data Rescue II...
http://www.alsoft.com/DiskWarrior/
http://www.prosofteng.com/products/data_rescue.php
(Has a Free Demo to see if it could or not, but you'll need another drive to recover to).
Or FileSalvage...
http://www.subrosasoft.com/OSXSoftware/index.php?%20mainpage=product_info&productsid=1
to recover what you can.

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...
I appreciate any further ideas. Many Thanks, Frank.

LaCie external HD does not mount after lion 10.7.2 upgrade

After the upgrade to Lion 10.7.2, my external LaCie 2big Quadra (connected through FW 800 to a MacMini late 2009) was no more visible to the system.
This has not been the first issue with this disk since I have Lion: after the upgrade fron Snow Leopard to Lion, the "Ignore ownership" flag of the volume was resetted to "marked" (which was a mess because I had my whole home folder on it).
After the 10.7.2 upgrade, I had no chances to re-mount the volume with Disk Utility (dimmed button) but, using the terminal I was able to find it in the /Volumes mountpoint and to recover my home with the ditto command to the MacMini internal drive.
After this I reformatted the disk and now it seems to beave properly but I have seen on the web plenty of troubles regarding FW management under Lion and I am not sure if it is a good idea to trust it again.
Does anybody have suggestion or news?

My Lacie ethernet mini is not working after Lion upgrade.
Finally got an admission from Lacie that the login software won't work with 10.7 and they suggested going back to Snow Leopard . . .
Apparently the login software cannot be changed or overwritten so now Lacie drives are obsolete when using Lion.
I wish there was a way to wipe it clean and use it without the login software, but they couldn't suggest a way.
I note you may have had better luck but I don't know how to use terminal, so I may have to junk it, or possibly take out the drive and buy a caddy for it?

G3 Tangerine: External HD does not mount

I just picked up a used and battered G3 300 running OS 9.0
There is one USB port on it.
I am trying to get a LaCie USB external drive to show up on the desktop, but the icon is not appearing.
Is this device not compatible with the machine?

That laCie drive is suffocating!
Like the above poster says, it needs more power. All you have on your clam is a USB 1.1 slot. Thats it. 1.1 doesn't put out as much power as a 2.0 slot, so you'll need an external power source to lug around with you. I have an external Toshiba that's supposed to work via USB power only, but it does also have a slot on the back for extra DC power. I got lucky with my Belkin USB hub that I had bought a while back. It came with a power adapter, and it fit the Toshiba drive.
Sure, it isn't as portable, but with 4GB flash drives going for 20 bucks, it'll only be a short while before you could just flash it up.

External HD does not mount

Hi,
I am using an iOmega FW800 & Lacie USB 100GB portable external HD's.
Both these drives don't mount after the combo update. Is there anything I can do to overcome this?
Any help would be appreciated.
Best Regards,
Aditya

Dear all,
Ive been hunting through the Support DIscussions and some kind soul has actually provided an answer (YAAAYYY!) which I have followed and it worked!
Follow the relevant instructions on the linked thread below:
http://discussions.apple.com/message.jspa?messageID=2087835
Couple of notes for those who aren't technically minded (like me)
1. Read the instructions carefully.
2. Once you have typed in the command into TERMINAL and pressed RETURN, it looks like nothing has happened. You will need to LOG OUT or restart your mac for the command to take effect. My Hard Drives power was ON when I restarted, and once I had, it mounted on the desktop just fine.
Hurrah!

Firewire external hd does not mount

Samsung 320GB SATA drive inside a Navigator 3.5" enclosure shows up in system profiler but not on desktop. Disk utility reconises it as 298.1GB OEM but 'verify disk' greyed out.

Can you reformat it using Disk Utility's Erase tab?

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.

Update 10.5.6: external HD used for Time Machine does not MOUNT anymore

I've used this LaCie external Little Big Disk since November 2007 with Time Machine, without problems. Recently, after updating to OS 10.5.6, the disk does not mount anymore when connected by FireWire800. Same result when using FW400 and USB.
The disk shows up in the System Profiler under FireWire. When I run analysis with a program 'Data Rescue II', it also sees the disk.
Main issue: disk does not mount anymore. So no more TM backups possible.
Although the disk also shows up in Disk Utilities, I can't partition or reformat it. I ran the LaCie Update Tool 2.0.1 and it says firmware is up-to-date.
I also reinstalled the Combo Update 10.5.6 without result. Also did all the forum recommendations such as resetting PRAM and using Terminal to 'mount /dev/xxx'. Does not help.
I feel this is an Apple issue.

Yes, did it three times. Also already hooked up in daisy chain, and yes, also connected to another Mac (also 10.5.6). Same result. I think it's an OS 10.5.6 issue, because it happened after the update and I had never problems in the last year using this disk with TM (it's not full either). I hope it's not, however, but I am afraid it is. Also I've posted the issue at LaCie support and see what they answer.
Thank you for your reply.

Maxtor OneTouch III does not mount with Firewire

My Maxtor OneTouch III does not mount with Firewire.
I changed both cables, and ports on the drive to try with my 400 port on the MacBook Pro.
The drive will start up, the light will flash, remain steady, flash again. And then just as the Mac finishes booting, the light turns off and it does not mount.
It works just fine with a USB cable. But I bought it so it could be used as a firewire drive.
Other firewire drives work.

Hi Judy,
Has this external HDD ever worked while connected with FireWire? (In other words, did the drive just stop working via FireWire, or is this the first time you've tried to hook it up via FireWire?) Does it work over FireWire on another Mac?
If the answer to those questions is no, it's likely that the firewire ports on the external HDD are bad.

Home DVD goes in, spins, does not mount, and then ejects. It does play on an old Windows PC.

Hi. I have a MacBook and I am able to play purchased DVDs just fine. However when I try to play the home DVDs my brother burned for me on his new MacBook Pro it doesn't work. The DVD goes in, spins, does not mount, and then ejects. It plays on an old Windows PC though. Very strange. Help!

I know your frustration, so happy I still own a PC just so I can burn any DVD I might still need!
I was told at the Apple store to go buy an external l0l
How awesome is THAT ...Yah you just paid an INSANE amount of cash for a CRAP laptop so now go out and spend MORE money on getting an external DVD burner so your expensive laptop can burn/play DVD's
YAY APPLE... wtg at putting out a quality product!
PS so fantastic to see all the responses to your cry for HELP here!

External drives will not mount if the wi-fi is on!

I have had no replies where I had previously posted so I thought I would try here as I think that it is mainly an Airport problem.
My problem is this. I have a Macbook that I use at home no problem. I teach at a college where there is are two wi-fi connections that my Macbook automatically connects to depending on where I am in the department. Recently almost everything I try and do causes the spinning beachball for 10 minutes or much more at a time. Additionally, I have discovered that any external drives will not mount on my laptop, unless I switch the wi-fi off! No-one else is having any problems at all.
One of the wi-fi connections is an Airport Extreme. Each morning my laptop gets the message that there is a problem and I need to update the firmware to 7.5.2. (I originally set the Airport up through my laptop) I am very wary of doing this as everything is working fine for the other 20+ laptops in the department and I have read lots of reports of problems with this update.
I suppose my questions are these - 1 Does anyone have any idea what is going on with my laptop? 2 What should I try doing to solve this issue?
I have searched the net and cannot seem to find any reference to this problem anywhere else. Any ideas at all why this might be happening will be much appreciated.

It was not until Mac OS X 10.6.4, not possible to run on a 10.2 machine, that ExFat was supported.
Many older Macs also will not recognize GUID formatted partitions made to boot Intel Macs either.
10.2.3 is the first system to support Apple Partition Map HFS Extended (Jornalled).
There may be NTFS support based on my tip here:
https://discussions.apple.com/docs/DOC-3003

External HD image not mounted

I recently disconnected my ext HD (unknowingly) improperly. Now the HD image does not mount and the ext HD lights are blinking. System profile: Firewire reads it as "unknown device". It is a SmartDisk CrossFire product-company just sold and I cannot find manufacturer support.
Am I SOL or is there a way to recover data?
Tried suggestions of unplugging and restarting - not successful.
Thanks for any help.
iMac 500 MHz (summer of 2000) 512 MB Mac OS X (10.4.1)

"Can you further explain your second idea."
As already suggested, if you have access to another Mac with a FireWire port, you could determine if the problem is with your iMac's FireWire bus, or the drive itself. When you purchased the drive, was it and is it still formatted as a FAT-32 or NTFS volume for PCs, or did you reformat it as a Mac OS Extended volume? If it's still formatted for use with PCs, that provides more options for you, in terms of being able to test it on a PC or Mac.
If the drive has a badly corrupted directory, transferring it to another enclosure won't solve the problem or recover your files. For data recovery, I'd recommend Prosoft Engineering's "Data Rescue." If the problem is strictly with the enclosure's bridge board, the only definitive way to confirm that would be to install another hard drive in it, and see if it's recognized by Disk Utility or mounts on the desktop. If a different hard drive is recognized, then the enclosure and its bridge board are good, and the hard drive itself is probably at fault. If a different hard drive produces the same results as the original drive that shipped in the enclosure, then the enclosure's bridge board may be damaged.
You could open the external case and transfer the hard drive to a new case. You need to know whether your existing FireWire drive has a 3.5" drive or a 2.5" laptop drive, as the data connection is different. Once you confirm what you have, you should check out Other World Computing and other online sources for a compatible FireWire enclosure. For a standard 3.5" ATA hard drive, OWC carries several external FireWire enclosures, such as this one by Macally, and their own line - the Neptune and the Mercury Elite. I'd be willing to spend a little more and go with the Mercury Elite, because I think it has a better design.

External MyBook does not mount

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