External Hard Drive no longer being recognized in Finder

My Seagate Ecternal Firewire hard drive was accidently unplugged a few minutes after transferring about 11gb of files to it. When I plugged it back in it is giving me the Error Message: DISK INSERTION then below that it says "The disk you inserted was not readable by this computer." It shows up in Disk Utility but gives me no options under the First Aid Category. Is there anything I can do to get the files that were on there back? A friend told me he believes I just unplugged it while it was doing some sort of "janitorial type work" after the file transfer because no applications were running at the time that it was unplugged. I dont see why unplugging it at that time would make me lose 250+gb worth of information, and I really hope that isnt the case. If anyone can give me some tips to figure out what exactly is wrong, or a place to go/ software to use to fix it, please let me know. thankyou

Vaio wouldn't know Mac file system from a hole in the wall unless it has Mediafour's Macdrive software.
It isn't so much updating 10.3, it is more updating your Disk Warrior to match your operating system. What version of Disk Warrior do you have?
P.S. note this is the 10.4 forums for Tiger. 10.3 is Panther. Future questions regarding 10.3 should be directed to the 10.3 and earlier forums. Though I'm happy to continue to try to solve your problem here.

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My toshiba external hard drive is not being recognized, except when I eject it. I have the preferences checked to show icon and have checked utilities folder. nothing. Help!

I have a iMac, Yosemite 10.10 and my toshiba external hard drive is not being recognized, except when I eject it!. I have the preferences checked to show icons and have looked in the utilities folder..nothing. I have also changed ports. ??

A few things to try:
1-Repair permissions and restart your computer.
2-Zap the PRAM
3-Use Software Update/App Store to update your OS to OS 10.10.3. Also, update everything SU/AS has to offer for your computer. When done, repair permissions and restart your computer.

External Hard Drive is not being recognized by Firewire 400

Hi everyone,
I update my Mac OS X (Leopard) last night, so this morning when I was going to connect my External Hard Drive (EDD) to my MacBook; the Firewire, which I normally used through Firewire 400, did not recognized my EDD. However, I tried by connecting using the USB option and it recognized the EDD working perfect. Thus, I would like to know how do I turn the Firewire 400 on/available, since it seems not being working properly.
Thanks a lot,
M
Macbook (Intel) early 2007.

if you have the power supply that comes with the external, use that if you haven't use it instead of rely on bus powered port.
connect your external, click blue apple on top left corner > about this mac > click more and on system profiler click firewire, and see if your external detected there.
You can try to reset PRAM to refresh your hardware behavior too:
http://docs.info.apple.com/article.html?artnum=2238
Good Luck.

My external hard drive is not being recognized by my MAC Pro. The icon does not appear on my desktop when I connect it to the MAC.

My external hard drive that I use as a backup is not being recognizedc by my MAC PRO. Usually I get the icon for the backup, when I attach it to my computer, but that isn't happening. What can I do?

Well, I tried all of your suggestions and they didn't work -- no surprise because I was trying to backup to my external c.d. disk. Duh! The application for the home is in the mail.

My external hard drive isn't being recognized

I have an extrenal drive I used to back up my dvds for faster viewing and the drive is going out I think. It will disconnect midway through movies, when uploading or downloading to/from it it will sometimes just disconnect itself. about 75-80% of the time its plugged in it wont show up. I can't attempt to transfer more than about 3 gigs of information or else if ejects itself, and it won't even show up in disk utility.
How can I get this crazy drive to be recognized so I can keep working on transfering the data back off it before it dies completely

OK, so are there any volumes listed for that disk in Disk Utility? And how does it not allow you to repair the disk? Is the option grayed out? Try clicking on the disk AND the volume and comparing the options for each.
For example:
149.1 GB FUJITSU MHW2160BHPL Media
|- Macintosh HD
|- disk0s3
186.3 GB Prolific PL3507 Combo Device *(On this disk…)*
|- Time Machine *(…here is my Time Machine volume.)*
|- Windows Extra
Message was edited by: Sidney San Martín

With the new FCPX 10.1, my external hard drive is not being recognized.

Today I updated my FCPX application to 10.1, but when I plugged in my 'passport for mac' (which has all my important 500 GB projects on it)
It does not come up like it used to. I have tried to import the files as libraries, but either it doesnt work, or I am doing it wrong.

File>Upgrade Projects and Events, then take the Locate route and choose that drive.
Ernie

My internal hard drive isn't being recognized on my macbook pro but when I put the HD in my Mac Pro (desktop), the desktop computer recognizes the HD. When I insert the installer CD on my laptop, it also doesn't recognize my hard drive. Please help!

My internal hard drive isn't being recognized on my macbook pro but when I put the HD in my Mac Pro (desktop), the desktop computer recognizes the HD. When I insert the installer CD on my laptop, it also doesn't recognize my hard drive. Please help! Thank you!
I've also been getting an image with the folder and question mark. I've tried everything on the apple support page but it doesn't seem to work either.

Well, I tried all of your suggestions and they didn't work -- no surprise because I was trying to backup to my external c.d. disk. Duh! The application for the home is in the mail.

I have a MacBook Pro, 10.10.2 Yosemite. My external hard drive no longer appears on my screen or in Time Machine

I have a MacBook Pro, 10.10.2 Yosemite. My external hard drive no longer appears on my screen or in Time Machine. I have gone into Disc Utility to repair disc, and get the message: Error: Partition map check failed because no slices were found. I was trying to follow Melophage's instructions by going into "Terminal" and entering "diskutil list; diskutil cs list; mount" and "diskutil info disk2." Then I entered the command "sudo got show disk1."   I am sure I have made the problem worse. Can you give me some help? Thank you. blelambert
Last login: Wed Mar 11 19:23:03 on ttys000
~ belambert$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         250.1 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *249.8 GB   disk1
                                 Logical Volume on disk0s2
                                 7A998EAE-68FB-4BAC-BF40-7A31D2806B2C
                                 Unlocked Encrypted
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *2.0 TB     disk2
   1:         Microsoft Reserved                         134.2 MB   disk2s1
~ belambert$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 883A56F4-5559-4872-A8DA-960F99655B63
    =========================================================
    Name:         Macintosh HD
Status:       Online
    Size:         250140434432 B (250.1 GB)
    Free Space:   8921088 B (8.9 MB)
    |
    +-< Physical Volume 7EDAFA20-FF9A-45FB-BA44-6526BB46C381
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     250140434432 B (250.1 GB)
    |
    +-> Logical Volume Family B47B0B40-CBF2-4D02-BFEF-182061AC6F8E
        Encryption Status:       Unlocked
        Encryption Type:         AES-XTS
        Conversion Status:       Complete
        Conversion Direction:    -none-
        Has Encrypted Extents:   Yes
        Fully Secure:            Yes
        Passphrase Required:     Yes
        |
        +-> Logical Volume 7A998EAE-68FB-4BAC-BF40-7A31D2806B2C
            Disk:                  disk1
            Status:                Online
            Size (Total):          249779191808 B (249.8 GB)
            Conversion Progress:   -none-
            Revertible:            Yes (unlock and decryption required)
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS
~ belambert$ mount
/dev/disk1 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
localhost:/vB3z604U-dvSpES6320fHq on /Volumes/MobileBackups (mtmfs, nosuid, read-only, nobrowse)
~ belambert$ diskutil info disk2
   Device Identifier:        disk2
   Device Node:              /dev/disk2
   Part of Whole:            disk2
   Device / Media Name:      WD My Book 111A Media
File System:              None
   Content (IOContent):      GUID_partition_scheme
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 USB
   SMART Status:             Not Supported
   Total Size:               2.0 TB (2000365289472 Bytes) (exactly 3906963456 512-Byte-Units)
   Volume Free Space:        Not applicable (no file system)
   Device Block Size:        512 Bytes
   Read-Only Media:          No
   Read-Only Volume:         Not applicable (no file system)
   Ejectable:                Yes
File System:              None
   Content (IOContent):      GUID_partition_scheme
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 USB
   SMART Status:             Not Supported
   Total Size:               2.0 TB (2000365289472 Bytes) (exactly 3906963456 512-Byte-Units)
   Volume Free Space:        Not applicable (no file system)
   Device Block Size:        512 Bytes
   Read-Only Media:          No
   Read-Only Volume:         Not applicable (no file system)
   Ejectable:                Yes
belambert ttys000                   Wed Mar 11 17:34 - 17:39 (00:05)
belambert ttys000                   Wed Mar 11 17:33 - 17:34 (00:00)
wtmp begins Sun Mar 8 14:40
~ belambert$ ~ belambert$ diskutil list
-bash: :~: command not found
~ belambert$ /dev/disk0
-bash: /dev/disk0: Permission denied
:~ belambert$    #:                       TYPE NAME                    SIZE       IDENTIFIER
~ belambert$    0:      GUID_partition_scheme                        *251.0 GB   disk0
-bash: 0:: command not found
:~ belambert$    1:                        EFI EFI                     209.7 MB   disk0s1
-bash: 1:: command not found
~ belambert$    2:          Apple_CoreStorage                         250.1 GB   disk0s2
-bash: 2:: command not found
~ belambert$    3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
-bash: /dev/disk1: Permission denied
~ belambert$    #:                       TYPE NAME                    SIZE       IDENTIFIER
~ belambert$    0:                  Apple_HFS Macintosh HD           *249.8 GB   disk1
-bash: 0:: command not found
~ belambert$                                  Logical Volume on disk0s2
-bash: Logical: command not found
~ belambert$                                  7A998EAE-68FB-4BAC-BF40-7A31D2806B2C
-bash: 7A998EAE-68FB-4BAC-BF40-7A31D2806B2C: command not found
~ belambert$                                  Unlocked Encrypted
-bash: Unlocked: command not found
:~ belambert$ /dev/disk2
-bash: /dev/disk2: Permission denied
~ belambert$    #:                       TYPE NAME                    SIZE       IDENTIFIER
:~ belambert$    0:      GUID_partition_scheme                        *2.0 TB     disk2
-bash: 0:: command not found
~ belambert$    1:         Microsoft Reserved                         134.2 MB   disk2s1
-bash: 1:: command not found
~ belambert$ ~ belambert$ diskutil cs list
-bash: ~: command not found
~ belambert$ CoreStorage logical volume groups (1 found)
-bash: syntax error near unexpected token `('
~ belambert$ |
-bash: syntax error near unexpected token `|'
~ belambert$ +-- Logical Volume Group 883A56F4-5559-4872-A8DA-960F99655B63
-bash: +--: command not found
~ belambert$     =========================================================
-bash: =========================================================: command not found
~ belambert$     Name:         Macintosh HD
-bash: Name:: command not found
~ belambert$
-bash: 3:: command not found
~ belambert$ /dev/disk1
   Whole:                    Yes
   Internal:                 No
   OS 9 Drivers:             No
   Low Level Format:         Not supported
:~ belambert$ Last login: Wed Mar 11 19:23:03 on ttys000
~ belambert$ diskutil list
   Whole:                    Yes
   Internal:                 No
   OS 9 Drivers:             No
   Low Level Format:         Not supported
~ belambert$ Last login: Wed Mar 11 19:23:03 on ttys000
~ belambert$ diskutil list
   Volume Name:              Not applicable (no file system)
   Mounted:                  Not applicable (no file system)

racergirl,
have you tried resetting your MacBook Pro’s System Management Controller, to see if that makes a difference with the heat?

External Hard Drive no longer showing in Devices

My external hard drive no longer shows up as a device on my MBP. It has worked fine since the day I plugged it in.
The Time Machine is using the HD, and continues to do it's backups, so power and USB connection is not an issue
The HD shows up in Disk Utility (The Time Machine portion AND the partition that I've been using for storage)
I ran a repair on the partition in Disk Utility and it checks out OK
I can access this partition from VMware Fusion, so the windows side of the MBP sees it, and it's operational
Used the HD all day yesterday without issue
I've restarted the MBP to see if it would find the HD partition after a restart, it doesn't
I've unplugged (USB) and powered-off the HD, and when I power-on, it still isn't seen.
Any ideas?
John

If TM is turned on and it still doesn't show up then do a SMC reset.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and 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.

LR 5 my external hard drive no longer appears as a hard drive but as a folder under "Volumes"

I am running LR 5 on a MacBook pro and my external hard drive no longer appears as a hard drive but as a folder under "Volumes". will this affect my ability to search and store in this external hard drive? How can I get it back to normal?

I just started having the same problem, oddly enough with a LaCie 500GB D2 Quadra external. Had it connected via FW800 then suddenly it won't appear in the Finder.
It shows up as an "Unknown Device" in the System Profiler under the FireWire Bus.
I do need the data on it so which solution is easier?
Replace the housing? Or am I better off calling LaCie and using the warrenty?
Thanks,
Shannon

LR 5 does not recognize my external hard drive. It has recognized this drive in the past. No help at any Adobe site.

LR 5 does not recognize my external hard drive. It has recognized this drive in the past. No help at any Adobe site.

My external HD contains photos I have worked on in the past.
Additionally, I have added photos to LR5 directly onto my Mac HD. (38
photos added when working in the absence of my external HD)
Presently, in the Library mode, the Le Cie external HD is not seen in the
upper left hand corner "Source" location.
The only way to "see" the La Cie HD and its photos is in the "Import" mode.
These photos have previously been imported.
I wish to use the La Cie HD as my source in the Library mode and proceed to
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In other words, work on my previously imported, previously worked on
photos, now on the La Cie.

My external hard drive doesn't show up in finder, is it dead?

My external hard drive doesn't show up in finder.Time machine can't find it. Does this mean my external hard drive is dead?
I borrowed a friends and switched mine with hers. My acted the same way in her macbook. I switched the cords on the external drives, no change.
Also, Is there a way to retrieve the information from my sick external hard drive? Thanks for your help.

If the Disk Utility sees it, you might be able to repair it or recover the data on it with a product such as DiskWarrior or Data Rescue.
If the Disk Utility doesn't see it, contact professional support.
(64290)

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.

LaCie 120Gb external hard drive no longer recognized

I've had a LaCie 120Gb external hard drive working independently off a firewire cable for a couple of months now. This morning it stopped being picked up as an external drive. It connects because you can feel it whirring, and stops when the computer is turned off (so the cables are working), but it no longer shows up in the finder or disk utility. I tried resetting the PRAM to no effect. Any ideas anyone???
Dave Nicholls, Auckland.

it spins because it has power. maybe your firewire port is damaged? does the drive have a usb port that you can try? if not, you can remove the hard drive from it's enclosure and install it in a tower mac or pc if you have one and see if it shows up then.

External Hard Drive No Longer Working After Being Removed From Mac

The following issue is happening to two other mac users that i know and its quite frustrating.
So if an external hard drive is not ejected properly from a mac, it then cannot be recognised by any other Mac’s. This issue is not isolated to just one external hard drive.
Then if i plug the external hard drive/s into my 8 year old Dell (PC) it works fine.
Further to this when i check the hidden files on the PC it looks as though Old Apple imbeds the external HD with a bunch of useless hidden files, once these are all deleted it miraculously works again on the Mac’s.
Too bad if you only have a Mac Because if the Mac disk utility can read the External HD it says that the disk has crashed and needs to be replaced.
Nice one Apple...
So now for my questions.
Why does mac add hidden files to an external hard drive when not ejected properly that prevents it from operating again on a Mac ?!!!!
How do i prevent apple from adding these hidden files?

Can you see the drive in Disk Utility? If so, try selecting it and using the Mount button in the top menu. You can also run repair disk and repair permissions.

External Hard Drive no longer being recognized in Finder

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