External HDD won't mount

Hello,
I was working on my external hard disk drive called 'Reserve', when the elektricity on that hard drive went out. When I wanted to re-connect my external hard drive to my MacBook Pro it showed the following message:
In other words, it didn't recognize the external hard disk drive 'Reserve'. When I clicked 'Initialize...' I got into Disk Utily where it showed the HDD, but without the partition 'Reserve':
There are some important files on it that I don't want to lose.
I've already looked up some stuff online, but as I'm not a computer expert, I have no idea what there talking about. DiskXsX and stuff like that... No idea.
If anybody could help me...? Please explain in a clear way. For dummies.
Thank a lot in advance!

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Similar Messages

External HDD won't mount to desktop from 1/2 of USB Ports

I have an external Iomega HDD and when it's plugged into my left USB port it works fine but when it's plugged into the right USB port it won't mount to the desktop and I can't access it. It doesn't show up in the system profiler or disk utility either.
However other usb devices (wireless mouse for example) work fine when plugged into that port. So I don't think it's the drive because it works in other ports and the port seems to be at least partially functional... But not with the drive.
Any ideas?

Is the drive bus-powered or does it have its own AC power adapter? Are you using a hub?

WD External HDD won't mount on iBook G4; no problem mounting on Macbook Pro

I've had a WD My Passport 320 GB drive for about 8 months using it as a Time Machine backup drive for my MacBook Pro. I put some files on there that I want to transfer to my wife's iBook G4 (12 inch, 1.33 GHz) but it simply won't mount. It sounds like the external hard drive performs one revolution and then clicks. It doesn't really start up. Can't locate in disk utility ever on the iBook.
I was wondering if maybe the iBook G4 didn't provide enough power through the USB ports since this is a portable external drive and hence relies on the computer for its power.
If anybody has any insight as to how I can fix this problem, it would be greatly appreciated.
We are looking to purchase a new hard drive for myself, and I was planning on giving the old one to my wife for her own use, but if it won't work, then I may have to re-think this one. Thanks.
Message was edited by: clarity23

If the port power is insufficient for the iBook to run an external hard disk drive,
you may have to connect the unit through a self-powered (AC adapter) USB
2.0 Hub. This would be able to supplement port power for external devices.
Also, depending on the uses, some drives have different results when used
with or in older Macs. And, as a side-note, what partitioning scheme was used
on that WD External HDD? This shouldn't be so important on a non-boot drive.
If the WD was partitioned in something other than HFS+ (or WIN-DOS) it may
have a hard time being seen by the iBook; though port power issues are likely.
The external drive likely pulls a bit more power than the computer ports allow.
With my iBook G4, when used on a desktop, it has its own powered USB setup
and keyboard, mouse, plus printer (or wireless Airport with printer, etc.)
A good tool to have on hand is a 4GB or larger USB flash drive for simple transfers.
Good luck & happy computing!

External HDD won't mount at boot. [Solved]

Edit:
I've noticed that this is an issue regarding my NTFS partition being on an external drive. Please check post #8 by me to get further details.
Hello guys, I'm having some problems getting my external NTFS HDD to mount automatically at boot. I have installed HAL and NTFS-3G, but I'm still getting problems. Mounting once the computer has finished booting is no problem using the simple mount command (sudo mount /media/pebble). I see no reason why this should be having problems mounting at boot with my fstab entry, but no errors occur when mounting manually.
Fstab entry:
/dev/sdc1 /media/pebble ntfs-3g fmask=022 1 0
rc.conf:
# /etc/rc.conf - Main Configuration for Arch Linux
# LOCALIZATION
# LOCALE: available languages can be listed with the 'locale -a' command
# HARDWARECLOCK: set to "UTC" or "localtime"
# USEDIRECTISA: use direct I/O requests instead of /dev/rtc for hwclock
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
LOCALE="en_US.utf8"
HARDWARECLOCK="localtime"
USEDIRECTISA="no"
TIMEZONE="America/Vancouver"
KEYMAP="us"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
# HARDWARE
# MOD_AUTOLOAD: Allow autoloading of modules at boot and when needed
# MOD_BLACKLIST: Prevent udev from loading these modules
# MODULES: Modules to load at boot-up. Prefix with a ! to blacklist.
# NOTE: Use of 'MOD_BLACKLIST' is deprecated. Please use ! in the MODULES array.
MOD_AUTOLOAD="yes"
#MOD_BLACKLIST=() #deprecated
MODULES=(fuse)
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
# NETWORKING
# HOSTNAME: Hostname of machine. Should also be put in /etc/hosts
HOSTNAME="r3-desktop-arch"
# Use 'ifconfig -a' or 'ls /sys/class/net/' to see all available interfaces.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
# - prefix an entry in INTERFACES with a ! to disable it
# - no hyphens in your interface names - Bash doesn't like it
# DHCP: Set your interface to "dhcp" (eth0="dhcp")
# Wireless: See network profiles below
#Static IP example
#eth0="eth0 192.168.0.2 netmask 255.255.255.0 broadcast 192.168.0.255"
#eth0="dhcp"
eth0="eth0 192.168.0.23 netmask 255.255.255.0 broadcast 192.168.0.255"
INTERFACES=(eth0)
# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
# - prefix an entry in ROUTES with a ! to disable it
gateway="default gw 192.168.0.1"
ROUTES=(gateway)
# Enable these network profiles at boot-up. These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
# Network profiles are found in /etc/network.d
# This now requires the netcfg package
#NETWORKS=(main)
# DAEMONS
# Daemons to start at boot-up (in this order)
# - prefix a daemon with a ! to disable it
# - prefix a daemon with a @ to start it up in the background
DAEMONS=(syslog-ng network netfs crond dbus hal alsa)
Do I need to load HAL earlier? What am I doing wrong?
Last edited by ryeguy146 (2009-11-05 10:04:32)

I just noticed something, I don't think that this is an issue with the partition being NTFS, but rather with it being on an external hard drive (/dev/sdc). I say this because I just rebooted and noticed another NTFS partition that I have in my fstab is mounting (/dev/sda5). It's an internal HDD, and I didn't notice that it mounted up because I rarely use it. But there it is.
I suppose that I should define /dev/sdc. It is a Western Digital External HDD running off of a USB 2.0 cable. I don't know why this makes a difference, but it apparently does. Both entries in the fstab are identical for their respective devices and mount points.
Now that we have that figured out, I think that I'll change the title of the thread. So any ideas on how to solve this one?

External drive won't mount after plugging in iPhone - MacBook 13'' (2,1)

Hi Support Crew...
I have a 13" MacBook(2,1) running OS X 10.6.2. This is a 2 GHz Intel Core 2 Duo machine w/ 4 GB RAM & 320 GB hard drive.
Today, I had the Iomega drive plugged in via USB, along with my soundcard (MOTU 828mk2) plugged in via FW. This is a very normal setup for me which has been bug free since I bought this computer over 2 years ago. When I plugged in my iPhone 3G via USB I got an error message which comes up when you incorrectly remove a device. This was strange because I didn't unplug anything, I only plugged in the iPhone. The iPhone was playing music when I plugged it in and I had to unplug and plug is back in to get iTunes to recognize it.
Ever since this happened, my Iomega external drive won't mount. I am able to access it via Disk Utility (and ran the Verify Disk/Repair Disk - everything is "ok"), however I can't access the data on the drive. I really really need the data but of course can't access it to backup.
Disk Utility log:
500.11 GB Ext Hard Disk Media (black text)
Iris (grey text) - I ran Verify Disk & Repair Disk
2010-01-22 14:20:51 -0800: Verify and Repair volume “Iris”
2010-01-22 14:20:51 -0800: Starting repair tool:
2010-01-22 14:20:51 -0800: Checking Journaled HFS Plus volume.
2010-01-22 14:20:52 -0800: Checking extents overflow file.
2010-01-22 14:20:52 -0800: Checking catalog file.
2010-01-22 14:20:56 -0800: Checking multi-linked files.
2010-01-22 14:20:56 -0800: Checking catalog hierarchy.
2010-01-22 14:20:58 -0800: Checking extended attributes file.
2010-01-22 14:21:00 -0800: Checking volume bitmap.
2010-01-22 14:21:01 -0800: Checking volume information.
2010-01-22 14:21:01 -0800: The volume Iris appears to be OK.
2010-01-22 14:21:01 -0800: Volume repair complete.
2010-01-22 14:21:01 -0800: Updating boot support partitions for the volume as required.
2010-01-22 14:21:01 -0800: Repair tool completed:
2010-01-22 14:21:01 -0800:
2010-01-22 14:21:01 -0800:
System Profiler shows the drive (on both FW & USB ports when I tried other cords). This drive does not require power and I am not using a USB hub, strictly the laptops ports. And yes, the laptop's power adapter is plugged in.
System Profiler: Device Tree log:
Iomega eGo HDD:
Capacity: 500.11 GB (500,107,862,016 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk1
Product ID: 0x047c
Vendor ID: 0x059b (Iomega Corporation)
Version: 0.01
Serial Number: 000000066273
Speed: Up to 480 Mb/sec
Manufacturer: Iomega
Location ID: 0xfd300000
Current Available (mA): 500
Current Required (mA): 0
Partition Map Type: APM (Apple Partition Map)
S.M.A.R.T. status: Not Supported
Volumes:
Iris:
Capacity: 499.97 GB (499,972,702,208 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk1s10
When I tried to run Migration Assistant, I just get the spinning search circle and none of the drives come up, just endless searching.
The fact that I got the "Improperly removed device" error when I plugged in the iPhone makes me think something weird is up and it's not actually the external drive. There is clicking/whining/noise, the drives powers up fine and is recognized by the system but the mount point is now "not mounted".
Does anyone have any idea how to fix? If you live in SF, I will buy you a beer.
J

I meant to say; "There are NO clicking/whining/noise sounds made by the external hard drive"

External HD won't mount on PB

External HD won't mount on PB but, will on iBook, G5 iMac, MBP, and Mirror Door G4. I have a USB 2 HD that will mount on everything but 15" Aluminum PowerBook. I even tried updating the IOUSBFamily.kext but no luck that just made my camera to start working with my PB. When I plug in my HD the LED just blinks back and forth orange and green instead of Blinking orange and turning a solid green when connected.
Any sugestions?

In reply to arnie: Good tips!
I'll just add - booting holding "AppleOption+OF" boots into open firmware. I've never booted into this mode (on purpose...) but it seems to be (correct me if I'm wrong) a unix interface to OS X. Just make sure to type the commands EXACTLY. Unix is much pickier than OS X.
I've heard problems like this before - usually with those little bus-powered HDDs and Powerbooks. It's something to do with the amount of power the Powerbook puts out, although it should be the standard 500 mA that the USB 2 specs require. This can happen with firewire, however. If there's a power cord, use it.
You might try plugging the drive into a self-powered USB 2 Hub - one with a cord that plugs into an AC wall socket, then connect it to the Powerbook. If the Powerbook recognizes the drive, then it probably needs extra power.
Good luck
-Dan
15" 1.67 Powerbook G4 (Jan 2005), 400 mhz AGP Sawtooth G4 Mac OS X (10.4.8) 4G Clickwheel and 5G Vid iPods
Message was edited by: Daniel W, stupid grammer!

Thunderbolt external SSD won't mount

I'm using the Elgato Thunderbolt SSD as an external hard disk with my 2013 MBP. Since I'm also using a Thunderbolt display, I usually daisy-chain the disk to the display.
Recently I disconnected the Thunderbolt display from my computer without unmounting the external SSD. Since this also disconnected the disk, I got the usual ticking-off ("You should eject a disk before disconnecting it").
However... since then, the external disk won't mount. It doesn't show up on the desktop or in Disk Utility, though it DOES show up ("Thunderbolt SSD") in System Information.
Because the SSD gets warm when it's in use, I think it's still working. I just can't access it.
Can anyone help?

Is the Apple Thunderbolt Display at the END of the daisy-chain? That's where it should be - all other TB devices should be connected first, with the Display at the end of the chain.
As to why you're having a problem getting the TB SSD to work, I'm stumped. It seems as if you've done everything that I would try to do to get everything working... and I'm assuming that you have powered down and unplugged the Display and all other devices for 15 minutes or so?
Just make sure that the Display is at the end of the TB chain - that's really the only advice that I can offer.
Clinton

My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?

My external drive won't mount. Disk Utility says it can't repair disk and to backup the disk and reformat, but how can I do that if it won't mount?

See mount section in 1st linked article.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk

LaCie external drive won't mount on iMAC

Hi,
My external LaCie external drive won't mount on my iMAC running 10.6.8 but will mount and show up on my PC as working fine, however I am not able to read the information on it as it was formatted for my iMAC. Therefore it leads me to believe this is a software issue.
I have reason to believe someone had changed the permissions and prevented the mounting of this external drive (which belongs to me) so that the contents won't be found on my iMAC.
How to resolve this issue?
Thanks in advance,
Cait

Cait,
Please try a SMC reset, it may take 2-3 attempts for it to work. Look over the instructions below carefully.
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.

Any fix for external Iomega HDD won't mount to iMac OSX 10.8.5 Desktop?

I have a 750GB Iomega external HDD that I've used for several years to back up my iMac (OSX 10.8.5) with Time Machine. No problems. Computer locked up while searching on the internet last night, requiring a restart. The external HDD never came back up on my desktop, It has power and all cable connectors are tight. The disk powers up and runs, but it just repeats its attempt to mount over and over, but won't show up on the desktop. So I can't run Disk Utility or any diagnostic software, since it isn't accessible form the iMac.
Any suggestions? I'm guessing my only option is to bite the bullet and buy a replacement backup hard drive, and start over from scratch in Time Machine. My attempts to look for help on the Iomega site have been frustrated by the new post merger Lenovo-EMC based site. Practically no references found to Iomega at all!

Yes, I checked that, and I tried restarting the computer with the HD turned on, then again with the HD turned off until after the computer finished booting up before turning the HD on. Nothing has worked to get the externa; drive to show up on the desktop. Thanks for replying. I'm not holding out much hope that the drive is going to work again. I'm on my way out to pick up a new backup drive. I figure I'll get one that is at least a TB, and 3.0 USB capable so that when the time comes that I replace my old iMac, the new drive will at least be able to back up the new equipment.

160 GB external USB HDD won't mount in 10.4.9; does in 10.4.0

I'm using a Beige G3 (though I don't think the model is the issue).
I know there's nothing wrong with the drive whatsoever, because it mounts on PCs, and it mounts when booted from both other hard drives on the system, on Mac OS 9.2.2 and Mac OS 10.4.0.
I know it used to mount on 10.4.9, too. I thought maybe when I installed a 4-port USB 2 card things would resolve, but they haven't.... so I expect it's a driver (extension) issue.
I deleted a bunch of extensions a while back that I was sure I didn't need... I suppose it's possible I deleted one vital for USB HDD support on the HDD using 10.4.9, only I don't know which it would be... things were self-explanatory in the days of OS 9, not so much with OS X, it would seem.
I didn't notice it until fairly recently since I'd been networking to the external HDD via another computer as the built-in 10BT was sadly faster than the USB 1.1 card I had installed prior.
Anyway.... since I assume this is an extensions problem (it says when I turn on the drive that a certain extension is missing, but I can't remember which), can anyone tell me what particular extension it is that enables USB Hard Drives?
By the way, USB flash drives mount and run at USB 2 speeds just fine. Thanks.

It's an adaptec card, but that's actually not the issue; it stopped working on the old USB card where it'd worked just fine before, whilst still working when I booted into 10.4.0.
Once upon a time it was working fine on both 10.4.9 and 10.4.0.
It now says "AppleXsanFilter.kext" was installed improperly and cannot be used" when I start up the drive. It knows it's there, it just can't access it. It then says "device was improperly removed" when I shut off the HDD.

External disc won't mount in Leopard, but will in Snow Leopard

I have a 5-yr-old G5 networked to a new iMac. I have had a 1-TB external HD attached via Firewire 400 to the G5 for about a year. Yesterday it didn't show up on the G5 desktop. I went to this forum, searched under "disc won't mount", got some ideas, ran DiskWarrior and Disk Utility...but nothing worked. They all said the disc was fine, directories rebuilt, etc., but it wouldn't mount. This AM it occurred to me that I had the correct cable, so I tried plugging it into the iMac instead. It worked. The data is safe, the disc shows up, everything seems to be OK, but it won't mount to the G5. Why would that happen, and how can I mount it to the G5? And how likely is the disc to remain accessible?

May I hop onto your thread as I have a similar problem.
I have a 5 year old G5 PMac with 10.5 onto which I have daisy chained two UltraMax 1TB firewire 800 drives. For the last 5 years I have been able, even with out sharing enabled, to connect to the G5 from a G4 Graphite with 10.4, a G4 Powerbook with 10.5 and now a MbP with 10.6.
After completing the login dialogue in the past from any other mac it would give me a list of the G5, it's Hard disk, user directories and the two Firewire Drives. On selecting them the drive would mount onto the desktop as a network drive. This went well until monday when it became temperamental in the morning and after a few restarts and one successful mount it has not shown up since. If I come to the G5 via the Go > Connect to Server I get a dialogue "Could Not connect to the server because the name or password are incorrect". If I try to connect via the network icon in the side window of the finder window I get a network dialogue log in, I get a list of folders and drives but then when selecting the FH drive get an error message which relates to the alias to the G5 Server requiring deleting or fixing.
Originally it just connected without any messing but now unless i make the firewire drive a shared drive the process on the other macs cannot see the firewire drive. NOTE - After having made the internal boot HD of the G5 shared, I can now see and mount this drive from the other macs but not the external drive.
This is causing me to pull my hair out, I have run disk utility, powered down unconnected and reconnected everything .The HD's appear to be working ok from the G5.
I urgently need to connect the FW drive to my G4 to do some work but it also needs to be connected to the G5, has anyone got a clue why I cant get G4 (or any other mac) to mount G5's external FW drive

Maxtor External Drive Won't Mount!

Here is my problem.
We got a Maxtor One Touch III 1 TB external drive. I loaded about 850 GB of media onto it, passed it off to my partner to continue to edit our video project. Everything was running fine on my macbook pro 2.2 core duo. He edited for a day on his macbook 1.83 core duo. Said everything was fine.
That night he shut the machine down without unmounting the drive. He said the drive kept blinking so he shut it off. In the morning he tried to connect the drive to a g4 tower running 10.3.9. (I never realized he was so tech-vapid). He said the drive wouldn't mount. Then he moved it back to his macbook. Still wouldn't mount. Now it won't mount on my macbook or any machine. He then wonderfully told me he once had the same problem with a G-Drive 500 GB external. Wouldn't mount after switching it to his g4 and back. G-Tech told him the drive was dead so he sent it back. Maxtor told us this drive is dead, but I just think it sounds fishy.
It is still spinning, but there is no light on. Have tried every different kind of connection and updated drivers, same result. A friend said if it got unintentionally unmounted it might take the OS hours to fix it up because it's a RAID 0, suggested leaving it connected for a few hours and see what happens, but that happened once with my G-RAID and it didn't need time to fix itself. I am stupid for buying a maxtor it seems, but it doesn't change my dilemma.
Someone help.

Check the /Volumes/ folder for a broken alias to the disk. The folder is invisible so you need to use the "Go" menu to open it.

Re: WD External drive won't mount

Hi
I have just experienced this issue today. I have gone through all the threads here and searched various other forums but haven't been able to come up with a solution yet. I might be missing something.
I'm running a 2011 Mac Book Pro OS 10.9.5 Maverick.
I have a 1TB My Passport for Mac that's a couple of years old now, it is used for my time machine backups. Using WD Drive Utilities, I can run a smart status scan which passes, the quick drive test Cancels.
In disk utility it appears on the left but is greyed out. The info that is provided tells me it is: (bare with me I'm using my iPad as my MacBook Pro won't allow me to Ely to this forum, an issue to tackle after this one)
type: partition
mount point: not mounted
owners enabled: no
journeled: no
disk utility is the only place I can see the drive appear. I don't Have the ability at the moment to connect the drive to a windows pc. I have also tried using disk utilities repair and erase options with no luck. I have tried using terminal and activity monitor several times as previously mentioned in this thread but again no luck but may have missed understood the directions.
I would simple reformat the drive but suspect because it's greyed out its why I can't.
any help or directions would be great?
thanks for your time and knowledge.

Read all the threads on this. I am similar to Phoenix86. I force quit fsck_hfs a few times when I started the bad drive but that did not prompt anything in finder. Currently I am imaging the drive to see if that gives me access to my files on the external. Last night I did a restore, but the (brand new) drive it saved to behaves just like the bad one that disk utilities so still can't access the files since that one won't mount either. I also tried a few things in terminal that someone else suggested, but like this repair:
fsck_hfs -r /dev/disk2s3
** /dev/rdisk2s3 (NO WRITE)
Can't open /dev/rdisk2s3: Permission denied
I don't know what to do with this message...
I feel so stupid, like the files are right there, but I can't get to them to copy them over. I can hear the disc spin, and it can eject from disk utility, can't open, not even in volumes directory.

WD External drive won't mount

Hello everyone! I haven't been here in a while because I just haven't had any Mac issues. Now I do.
I have a 1 TB WD external HD that won't mount. I connect it via firewire to an Old G4 Sawtooth running OS 10.5.8. My mac sees the drive, it just won't mount. I've also tried to mount it via USB, but again, my system sees the drive, but won't mount it. I inadvertantly disconnected the firewire cable, which I didn't realize for several hours. I reattached the cable, tried to mount it, and nothing. I ran disc repairs, and Disc Utility actually told me the drive was successfully repaired. Again I tried to remount it, but nothing. I repaired permissions, and this didn't work. I've tried different cables, and this doesn't work.
I don't have another Mac to connect it to, so I don't know if this would work. Here's where things get a little wierd, but interesting. I connected it to my PC laptop, and it mounted. Now, this is a drive that was formatted Mac OS Extended (Journaled) on my G4, so I have to use Mac Drive so my PC will recognize and mount The Drive. So My PC sees The Drive as Mac OS Extended, and mounts it. All files are in tact, and the drive runs normally. This is a music drive and it plays normally on my PC. Meanwhile, if I try connecting it back on My Mac, the name of The Drive randomly changes from 931.5 GB WD to 931.5 GB WD My Media Book. I believe My Media Book is the factory name of The Drive before OS formatting. The Volume name remains the same on my G4 each time I've tried to mount it.
I do have another identical drive that mounts from all the bus ports on my G4. Any ideas here? Can I get my Drive to begin mounting on my G4 again? Any and all answers are appreciated.

Terminal List. disk4 is the malfunctioning drive.
Last login: Mon Feb 25 19:25:12 on ttys000
raymond-medinas-power-mac-g4-agp-graphics:~ raymondmedina$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *111.8 Gi   disk0
   1:        Apple_partition_map                         31.5 Ki    disk0s1
   2:             Apple_Driver43                         28.0 Ki    disk0s2
   3:             Apple_Driver43                         28.0 Ki    disk0s3
   4:           Apple_Driver_ATA                         28.0 Ki    disk0s4
   5:           Apple_Driver_ATA                         28.0 Ki    disk0s5
   6:             Apple_FWDriver                         256.0 Ki   disk0s6
   7:         Apple_Driver_IOKit                         256.0 Ki   disk0s7
   8:              Apple_Patches                         256.0 Ki   disk0s8
   9:                  Apple_HFS Mac Leopard II          91.8 Gi    disk0s10
10:                  Apple_HFS Mac Tiger               19.7 Gi    disk0s12
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *186.3 Gi   disk1
   1:        Apple_partition_map                         31.5 Ki    disk1s1
   2:             Apple_Driver43                         28.0 Ki    disk1s2
   3:             Apple_Driver43                         28.0 Ki    disk1s3
   4:           Apple_Driver_ATA                         28.0 Ki    disk1s4
   5:           Apple_Driver_ATA                         28.0 Ki    disk1s5
   6:             Apple_FWDriver                         256.0 Ki   disk1s6
   7:         Apple_Driver_IOKit                         256.0 Ki   disk1s7
   8:              Apple_Patches                         256.0 Ki   disk1s8
   9:                  Apple_HFS Mac Leopard I           186.2 Gi   disk1s10
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *465.8 Gi   disk2
   1:        Apple_partition_map                         31.5 Ki    disk2s1
   2:             Apple_Driver43                         28.0 Ki    disk2s2
   3:             Apple_Driver43                         28.0 Ki    disk2s3
   4:           Apple_Driver_ATA                         28.0 Ki    disk2s4
   5:           Apple_Driver_ATA                         28.0 Ki    disk2s5
   6:             Apple_FWDriver                         256.0 Ki   disk2s6
   7:         Apple_Driver_IOKit                         256.0 Ki   disk2s7
   8:              Apple_Patches                         256.0 Ki   disk2s8
   9:                  Apple_HFS 500 GB HD               465.6 Gi   disk2s10
/dev/disk3
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *931.5 Gi   disk3
   1:        Apple_partition_map                         31.5 Ki    disk3s1
   2:             Apple_Driver43                         28.0 Ki    disk3s2
   3:             Apple_Driver43                         28.0 Ki    disk3s3
   4:           Apple_Driver_ATA                         28.0 Ki    disk3s4
   5:           Apple_Driver_ATA                         28.0 Ki    disk3s5
   6:             Apple_FWDriver                         256.0 Ki   disk3s6
   7:         Apple_Driver_IOKit                         256.0 Ki   disk3s7
   8:              Apple_Patches                         256.0 Ki   disk3s8
   9:                  Apple_HFS 1 TB Music Drive II     931.4 Gi   disk3s10
/dev/disk4
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     Apple_partition_scheme                        *931.5 Gi   disk4
   1:        Apple_partition_map                         31.5 Ki    disk4s1
   2:             Apple_Driver43                         28.0 Ki    disk4s2
   3:             Apple_Driver43                         28.0 Ki    disk4s3
   4:           Apple_Driver_ATA                         28.0 Ki    disk4s4
   5:           Apple_Driver_ATA                         28.0 Ki    disk4s5
   6:             Apple_FWDriver                         256.0 Ki   disk4s6
   7:         Apple_Driver_IOKit                         256.0 Ki   disk4s7
   8:              Apple_Patches                         256.0 Ki   disk4s8
   9:                  Apple_HFS 1TB Music Drive         931.4 Gi   disk4s10
raymond-medinas-power-mac-g4-agp-graphics:~ raymondmedina$
Terminal info on disk4s10.
Last login: Mon Feb 25 22:22:41 on ttys000
raymond-medinas-power-mac-g4-agp-graphics:~ raymondmedina$ diskutil info disk4s10
   Device Identifier:        disk4s10
   Device Node:              /dev/disk4s10
   Part Of Whole:            disk4
   Device / Media Name:      Apple_HFS_Untitled_1
   Volume Name:              1TB Music Drive
   Mount Point:
   File System:              Journaled HFS+
   Owners:                   Disabled
   Partition Type:           Apple_HFS
   Bootable:                 Is bootable
   Media Type:               Generic
   Protocol:                 FireWire
   SMART Status:             Not Supported
   Volume UUID:              61A8EAFF-E1C9-3605-AF92-5A210E3C781A
   Total Size:               931.4 Gi (1000069726208 B) (1953261184 512-byte blocks)
   Free Space:               0.0 B (0 B) (0 512-byte blocks)
   Read Only:                No
   Ejectable:                Yes
   Whole:                    No
   Internal:                 No
Disk Utility Info on 1TB Music Drive.
Name :
1TB Music Drive
Type :
Volume
Disk Identifier :
disk4s10
Mount Point :
Not mounted
File System :
Mac OS Extended (Journaled)
Connection Bus :
FireWire
Device Tree :
IODeviceTree:fwx/node@90a9c5c29aa50b/sbp-2@c000
Writable :
Yes
Universal Unique Identifier :
61A8EAFF-E1C9-3605-AF92-5A210E3C781A
Capacity :
931.4 GB (1,000,069,726,208 Bytes)
Owners Enabled :
No
Can Turn Owners Off :
Yes
Can Be Formatted :
Yes
Bootable :
Yes
Supports Journaling :
Yes
Journaled :
No
Disk Number :
4
Partition Number :
10
I've read that WD uses crappy chipsets in their external drives. I'm wondering if the chipset is suspect here? Just not sure. I did discover that I can clone the drive from my PC as an exact Mac OS Extended (Journaled) drive, and my Mac doesn't even know the difference. I've also read that I can initialize the drive, and reinsert the drivers, and the drive should function normally. Interesting, huh? Well, let me know what you come up with BDAqua. And again, many, many thanks.

External HDD won't mount

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