External Hard Disk has become undetectable

My WD external harddrive 500Gb use to show up on my computer, and is suddenly undetectable.
It does however show up on the Disc Utility, but I can't verify or repair it.
I have important video footage on the drive, and would like to retrieve it..... Help!
Thanks

Hi Brian
Yes, the mount button is enabled. When I click on it:
The disk “Apple Elements” could not be mounted.
Try running First Aid on the disk and then retry mounting.
Then I click on Verify Disc:
Invalid sibling link
The volume Apple Elements needs to be repaired
Error: Filesystem verify or repair failed.
Then I click on Repair Disc:
Invalid sibling link
The volume Apple Elements could not be repaired
Error: Filesystem verify or repair failed.
I've never had a problem with this drive until now, and I've had it 6months.

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External Hard disk has space problem for Time Machine

Im not sure this is the right place to post this, but I've just got OSX.5 so Time Machine is new to me. I've got a 500Gb Firewire Lacie Drive which I now have, as far as I can see, about 110GB of stuff in. I have a bout 300Gb to back up. Currently my mac can only see 260GB free, which means theres about 150GB that isnt explained. I have run Disk Inventory, which shows the dot files on the drive. There seem to be hardly any. Is there anything else that could be taking up such a large amount of disk space? Theres one movie file of 28GB that I cannot move off the drive.

Tim Whelan2 wrote:
Im not sure this is the right place to post this, but I've just got OSX.5 so Time Machine is new to me. I've got a 500Gb Firewire Lacie Drive which I now have, as far as I can see, about 110GB of stuff in.
Let's see what Disk Utility (in your Applications/Utilities folder) says. When it starts, click the top line for your drive in the sidebar (should have size and make), then the Partition tab. Towards the bottom is a *Total Capacity* line, followed by two different numbers: one in GB, the other in bytes. The first will be about 465 GB, the second roughly 500 billion. This is the different way of counting: decimal vs. binary.
There's also a *Partition Map Scheme* line. This should be followed by GUID or +Apple Partition Map.+ If your drive isn't one of those, you're going to have a problem using it with Time Machine. Report back what this says.
In the center part of the display is a diagram showing all the partitions currently on the disk. Each is represented by a box, with a name in the center, and the amount used represented by light blue shading.
If there's only one partition, it's total size and amount available will be in the center, shown in GB.
If there are 2 or more, click each one in turn to see it's sizes. The Total of the sizes should be almost the same as the total at the bottom (the Partition Map takes a bit of space).
It sounds like you may have 2 partitions, one for TM backups, one for your "other stuff". If so, each partition is treated separately for most purposes: there should be two icons on your desktop and/or Finder sidebar, for example.
Report back what you find, and whether it makes sense to you or not. Then we can figure out what's going on and what you need to do.
But note this: This drive is a bit small to use with Time Machine. TM works best if it has 2-3 times the space of what it's backing-up, so it can keep a few months of your backups. See item #1 of the Frequently Asked Questions post at the top of this forum.
Even if you could use the entire 465 GB or so, that's less than twice the 300 gb you want to back up. That would work, for a while, but depending on how you use your Mac, TM may not be able to keep your backups for very long.

How can I see if an external Hard Disk has spun down?

Does anybody know? Where or how?
Thanks

I use patented FeelSpin®. I just put my hand on the enclosure. If it's not spinning, I can feel there's no vibration, even the slightest. Not being a smartass: low tech solution works for me.
I suppose it might not work if the enclosure/drive when spinning transmits absoutely no vibration. Put your hand on the enclosure while the drive is spinning, then unmount the drive and feel the difference.

I currently have a MAC Mini, which has 1 Firewire 800 port. I have a 1TB external hard disk that runs at Firewire 400. Can I insert another external hard drive that runs at Firewire 800?

Here's the deal. Currently running SL 10.6.8 on a MAC Mini. Planning for eventual upgrade to ML. Have a 1TB external hard drive partitioned into two volumes, one volume for Time Machine and one volume for SL which I periodically update using Superduper. Thus I always have a point-in-time bootable backup on the external hard drive.
The MAC Mini supports Firewire 800. However, booting from my current external hard disk is pretty slow, since it only supports Firewire 400. I am considering buying an Iomega MiniMax which supports Firewire 800. Then, I would use the MiniMax as my bootable backup volume, and relegate the older hard drive to Time Machine.
So, question #1 is, can I daisychain the new MiniMax between the MAC Mini and my existing external hard drive? My expectation is that the new Mini Max would run using Firewire 800 and that the existing hard drive would run at Firewire 400 speed as it does today. If it doesn't (e.g., daisychaining in the Firewire 400 external disk with the MiniMax Firewire 800 external disk ends up running the whole leg at 400), my resolution will be to run the existing hard disk off an available USB port and have just the MiniMax running at Firewire 800.
Why am I going to all this trouble? That's question #2. I don't trust upgrades; they always break something. When I upgraded from 10.5.x to 10.6.x, the web directories got renamed, and all of my web apps 403'd until I figured out what happened. Plus, I have accounts for other family members, and in order to ensure their ability to use the computer during my upgrade process, I need to have the ability to fall-back quickly to a known-stable version of OSX. So what I'm trying to do is insulate myself from problems by partitioning the MiniMax into two volumes, taking a Superduper image of my current installation on the Mac Mini to MiniMax external drive volume 1, then upgrading to ML on the MAC Mini, and take a SuperDuper image of that to MiniMax external drive volume 2. Then, if the upgrade results in problems I can't resolve immediately, I can simply reimage the MAC Mini from MiniMax volume 1. BUT ...
... I've read that the ML installation creates a "service and support" partition that is different than the startup disk. I'm concerned that I won't be able to reimage the hard disk in the MAC Mini once I upgrade it to ML because of the partitioning changes it introduces on the startup disk. Theoretically, I +should+ be able to use the disk utility on my SL system to repartition the disk in the MAC Mini prior to reimaging it from my backup, but I'm considering the possibility that the new partition may be of a type that the SL disk utility cannot identify, and might therefore be unable to delete or even detect. So I'm hoping someone else has been down this road and can advise me. Even at Firewire 800 speeds, booting from an external disk is still going to be slow, so I want to be able to restore my SL image to the MAC Mini hard disk.
A little background on me. I work for a major disaster recovery provider. I used to have a Mac PRO G5, which I got used, and the first thing I did with it was install a second hard disk, SuperDupe an image from the first disk to the second, and made sure I could boot from the second. THEN I started using and customizing the MAC. I really feel vulnerable with the MAC Mini, since it only has the single internal hard drive - sort of like going out in public dressed only in a long T-shirt. So my whole thing is, I ABSOLUTELY MUST BE ABLE TO PUT THINGS BACK THE WAY THEY WERE before I do the migration to ML.
Obsessive-cumpulsive? Yep. Anal? You got it. That's why I'm in the DR business.

You may have overloaded the port, following the instructions below it should reset:
+1. Shut down the computer.+
+2. Disconnect all devices and all other cables, except the keyboard and mouse cable(s).+
+3. Disconnect the computer from the power outlet and wait for 3 to 5 minutes.+
+4. Plug the computer back in and turn it on.+
+5. Reconnect the device(s) (one at a time if there is more than one) and test. Test with each port if you have more than one.+
http://support.apple.com/kb/HT1317?viewlocale=en_US

Transferred backed-up data from external hard disk to new hard drive on my MacBook Pro which seemed to be successful. I now find that some (or maybe all) old emails have been resent. Can anyone tell me what has happened?

Transferred backed-up data from external hard disk to new hard drive on my MacBook Pro which seemed to be successful. I now find that some (or maybe all) old emails have been resent. Can anyone tell me what has happened?

Greetings,
I've never seen this issue, and I handle many iPads, of all versions. WiFi issues are generally local to the WiFi router - they are not all of the same quality, range, immunity to interference, etc. You have distance, building construction, and the biggie - interference.
At home, I use Apple routers, and have no issues with any of my WiFi enabled devices, computers, mobile devices, etc - even the lowly PeeCees. I have locations where I have Juniper Networks, as well as Aruba, and a few Netgears - all of them work as they should.
The cheaper routers, Linksys, D-Link, Seimens home units, and many other no name devices have caused issues of various kinds, and even connectivity.
I have no idea what Starbucks uses, but I always have a good connection, and I go there nearly every morning and get some work done, as well as play.
You could try changing channels, 2.4 to 5 Gigs, changing locations of the router. I have had to do all of these at one time or another over the many years that I have been a Network Engineer.
Good Luck - Cheers,
M.

How can i extend the Apple TV storage to get an 1 TB? apple has any external hard disk or similar?

how can i extend the Apple TV storage to get an 1 TB? apple has any external hard disk or similar?

Only AppleTV1 has an internal PATA drive. The largest PATA drive available is 250gb.
Hacks are available to use the USB port on AppleTV1 to access more storage.
AppleTV2 does not have an internal drive.
Why do you need more storage in your AppleTV? iTunes streams video to AppleTV so no need to store it locally.

Disk write cache corruption on an external hard disk

Recently I purchased an external hard disk, to put all of my pictures of my baby due to space limitations on my internal laptop drive. Since my Canon camera 10 megapixel pictures take up a ton of space this was occurring at an alarming rate. My intention was also to back up to DVD but never got to it. This is both a comment and a question.
Now said baby, is getting really good at pulling cords etc. He managed to do this on the external drive firewire cable. As far as i know the drive was not in the process of actually writing. However, after a few minutes and trying to re-plug the drive the OS crashed with a Grey Screen of Death hardware error that tells you that you need to push the power button..
This apparently corrupted the drive's directory. Upon reboot the drive would not mount. Since there were time machine backups on the drive too Diskwarrior was not able to reconstruct the drive in the built in memory available on the computer. Time machine stores millions of files and Diskwarrior apparently wants to keep it all in memory at once. Since my computer has 2GB you would hope that would be enough but apparently not. So that failed. Other utilities seemed to be able to find the files but not restore the directory. I also took it to the apple store they were not able to recover it.
I have to say this is extremely distressing, and hard to believe that a simple accident like this could cost the loss of thousands of pictures. I did send it to a rescue company but that was expensive but I think apple needs to do something about this situation.
On Windows there is a way to disable the write cache for external drives. This is not available for Mac OS X. This would prevent this rather common occurrence of a plug accidentally becoming disengaged when the drive is not in the process of writing. This reduces the odds but I still think apple, in order to become clearly superior, needs a better solution.
I know Apple has experimented with ZFS would this not eliminate this possibility of this kind of disaster? Is this in Snow Leopard desktop? I know they are thinking this is a business customer focused technology but clearly if it can eliminate this kind of thing then I think it is extremely useful to their non server customers. Perhaps there are other ways of dealing with this issue but ZFS is designed to deal with these issues. HFS+ is extremely fragile to disk corruption.
I know my situation is not that uncommon and this is not the first time this has happened to me with an external drive. You would think I had learned. I hate to think of how many other people have had the same thing happen to them.

Disabling a write cache would not help you with the problem you are having. Besides the write cache is on the hard drive and operates independently of the operating system. But nothing can protect you from disconnected an external drive improperly, and if the drive is in the process of being written to, and the problem comes from directory corruption, not file corruption, as in the case you have described, disabling a write cache would not have made any difference.
For the future the magic word is: Backups.
< Edited by Host >

If i move my iphoto & iMovie source library / Events and Projects to an external hard disk, due to size, will my existing slideshows work ?

I need to move my photo library and Movies (Events and Projects) to an external hard disk as my 700gb drive on my iMac is now full (*see note below)
I have brought 2 Samsung External drives (3TB each) which I plan to partition each for Photos and Movies i.e 2 partitions on each drive, and will use one for use with iPhoto and iMovie, and the other drive for a dedicated backup. I will backup the remainder of my iMac hardisk to a seperate disk.
What has just occured to me is that after I have moved the libraries I cannot see how existing iMovie projects and iPhoto Slideshows will work, as each Application will be looking for the source files on the original iMac hardisc (I assume).
I am running Snow Leopard v10.6.8 ( I did not want to upgrade to Mountain Lion as I was told the iPhoto and iMovie changes were a 'backward' step. However I now want to upgrade to Mountain Lion, for security updates reasons mainly, and so need to free up my hard drive.
Can anyone advise on the best way to proceed ?
* - the iMac hard disk become full very suddenly, possibly due to duplicates, as I have noticed duplicate events and clips in my iMovies event library. I have noticed that some events are also now not showing, with message 'No video clips match the current selection' (I have not search criteria set).
Thanks

I was planning on manually backing up my external to the time capsule - but is there a way to set it up to back up automatically instead?
Time Machine will backup up automatically - you can not have your iPhoto library on the same volume as the TM backup (it will not work and it would not be a backup)
Dragging the iPhoto library to any external drive will backup it us also
I was also thinking about having the library copied to another external (I mean we're talking about irreplaceable photos here) - would i just drag a copy of the library to that drive as well?
Yes - that is a good idea - I run TM giving me hourly backups and a daily clone of my entire system giving me a bootable backup - plus do an occasional TM backup at our second home so I have one off site
is it possible to deal with my imovie library in the same way? so all my movies and photos are on my external?
Probably - but I use iMovie very little - better question for the iMovie forum
LN

Protecting an external hard disk from copying

I have an external hard disk with 120+GB of teaching resources in what may soon become a semi-open access environment. I would like to set up the drive so that a user can view files on it but not copy them onto a CDR or another external drive. Is this possible? I tried setting "permissions", but I could get the effect I was after.
G4 PowerMac Mac OS X (10.4.8)

It isn't possible. If a user has permission to read files on the volume, the user then has permission to copy and save them to another location.
I'd be more worried about your files getting trashed. External drives are very insecure. Even if you try to enforce permissions on them, as soon as the drive is plugged into a Mac, the user will have full read+write access to all its contents by default. That's the nature of external drives.
So I'd start a comprehensive backup regimen to protect the data on the drive, or try a network storage solution on which permissions can really be enforced.

Newbie: External Hard Disk Advice.

Dear FCP users,
Could you please offer some advice regarding an external hard disk for Final Cut Pro X.
I currently have the following:
iMac 24-inch 2.8GHz Intel Core 2 Duo
Sony HDR-SR12
Final Cut Pro X (about to purchase)
I'm looking to upload my captured HD video to an external hard drive and then edit and render with Final Cut Pro X.
This is where I become a bit stuck and searching Google brings up very old information.
I'm thinking that Firewire 800 will be the best solution based on ports available on my iMac. If so, i've been looking at the following, would this be suitable?:
Iomega 2TB MiniMax Hard Drive FireWire 800
http://store.apple.com/us/product/H0815VC/A
What other options are available to me? I've also heard of eSATA and RAID but not sure what these are and if they are possible with my iMac.
One last thing. I also have a Time Capsule connect via network cable. Would another option be to use a networked external hard drive?
Sorry, but like I said, i'm new to all this. Hope you go easy on me and offer some advice.
Regards,
Richard.

Hi Kenneth,
Thanks for the reply.
Sorry but i'm really new. Are Logic Files the recorded files on my Sony HD Camcorder? Also I am unsure what VSL samples are.
Is there any point me buying an external HD that has eSATA? I mean, can I connect this to my 24" iMac? Or am I limited to a drive that has 800 Firewire connection?
I currently have an external HD connected to my network as a media server. Would an external HD be better for video editing with this type of connection compared to 800 Firewire?
About 5 years ago I used to upload my uncompressed SD footage directly to the computer's HD and use a mixture of Sony Vegas and Adobe After Effects for the editing so i'm ok when the footage is on the computer.
I'm just worried about editing HD footage as it's so much bigger and don't want problems editing when the footage is stored on an external drive instead of internal.
Thanks in advance.

Problems with iPhoto after exporting library to external hard disk

Hello all,
I am using iPhoto 8 on an iBook G4. I recently attempted to back up my iPhoto library to an external hard disk. I did this by dragging the iPhoto library to the external hard disk. I did not delete the library on my own computer. Since I've done this, iPhoto has not been problematic. For instance, when I attempt to open an event on my computer, I can not see the thumbnails of all the photo's in the event - iPhoto will display each individual photo in sequence. If I want to print a picture, I have to export the entire event - I can't just drag the thumbnail to my desktop. Also, when I attempt to upload new pictures from my camera it produces an error.
Does anyone know what might be going on? I need to be able to access my photo's, so can anyone give me some advice on how to fix whatever I've done?
Any help you can give me would be much appreciated.

Gina2008
iPhoto will display each individual photo in sequence.
There's a slider lower right of the iPhoto Window - drag it left.
Why are you exporting to Print?
when I attempt to upload new pictures from my camera it produces an error.
What does the error say?
As for accessing your pics:
There are many, many ways to access your files in iPhoto:
For 10.5 users: You can use any Open / Attach / Browse dialogue. On the left there's a Media heading, your pics can be accessed there. Apple-Click for selecting multiple pics.
Uploaded with plasq's Skitch!
To upload to a site that does not have an iPhoto Export Plug-in the recommended way is to Select the Pic in the iPhoto Window and go File -> Export and export the pic to the desktop, then upload from there. After the upload you can trash the pic on the desktop. It's only a copy and your original is safe in iPhoto.
This is also true for emailing with Web-based services. If you're using Gmail you can use THIS
If you use Apple's Mail, Entourage, AOL or Eudora you can email from within iPhoto. With 10.5 you can access the Library from the New Message Window in Mail:
Uploaded with plasq's Skitch!
If you use a Cocoa-based Browser such as Safari, you can drag the pics from the iPhoto Window to the Attach window in the browser.
Or, if you want to access the files with iPhoto not running, then create a Media Browser using Automator (takes about 10 seconds) or use THIS
Other options include:
1. *Drag and Drop*: Drag a photo from the iPhoto Window to the desktop, there iPhoto will make a full-sized copy of the pic.
2. *File -> Export*: Select the files in the iPhoto Window and go File -> Export. The dialogue will give you various options, including altering the format, naming the files and changing the size. Again, producing a copy.
3. *Show File*: Right- (or Control-) Click on a pic and in the resulting dialogue choose 'Show File'. A Finder window will pop open with the file already selected.
Regards
TD

I can't copy my itunes library to an external hard disk drive!!

this is my first time at the forum and i dont find a better way to ask, i want to copy my itunes library to an external hard disk drive for have a back up, but when i try to copy it it appears this message "the item "itunes music" has 1 or more items that are in use and cannot be modified", i dont know why, then i search for help in apple support and this article http://support.apple.com/kb/HT1751, but i do what it says and i still having my problem, i can't copy my music, that message keep's appearing and it dont let me copy my music.

forget it i discover my problem, this message gives u 2 option stop or continue i just click continue and it get copied, i think this is normal but like this is my fisrt time i dot this i get confused, i think i still used to windows, i cant believe because i have a ear with this computer. well anything is a good experience.

How do i burn idvd projects in a dvd format to an external hard disk

I have an iDVD project but it is too big to burn to a dvd (11GB!) so I was wondering if I can save the proejct like a dvd onto my External Hard Disk. This is really urgent and important for a school project.
Thanks in advance.

iDVD does not care about file size (it compresses a movie file by about 4:1 o the standard mpeg2 format), only about length.
A standard DVD will hold up to 120 minutes of video, but this includes titles, transitions etc.
iDVD encoding settings:
http://docs.info.apple.com/article.html?path=iDVD/7.0/en/11417.html
Short version:
Best Performance is for videos of up to 60 minutes
Best Quality is for videos of up to 120 minutes
Professional Quality is also for up to 120 minutes but even higher quality (and takes much longer)
That was for single-layer DVDs. Double these numbers for dual-layer DVDs.
Professional Quality: The Professional Quality option uses advanced two-pass technology to encode your video (The first pass determines which parts of the movie can be given greater compresson without quality loss and which parts can’t. The second pass then encodes those different parts accordingly) , resulting in the best quality of video possible on your burned DVD. You can select this option regardless of your project’s duration (up to 2 hours of video for a single-layer disc and 4 hours for a double-layer disc). Because Professional Quality encoding is time-consuming (requiring about twice as much time to encode a project as the High Quality option, for example) choose it only if you are not concerned about the time taken.
In both cases the maximum length includes titles, transitions and effects etc. Allow about 15 minutes for these.
You can use the amount of video in your project as a rough determination of which method to choose. If your project has an hour or less of video (for a single-layer disc), choose Best Performance. If it has between 1 and 2 hours of video (for a single-layer disc), choose High Quality. If you want the best possible encoding quality for projects that are up to 2 hours (for a single-layer disc), choose Professional Quality. This option takes about twice as long as the High Quality option, so select it only if time is not an issue for you.
Use the Capacity meter in the Project Info window (choose Project > Project Info) to determine how many minutes of video your project contains.
NOTE: With the Best Performance setting, you can turn background encoding off by choosing Advanced > “Encode in Background.” The checkmark is removed to show it’s no longer selected. Turning off background encoding can help performance if your system seems sluggish.
And whilst checking these settings in iDVD Preferences, make sure that the settings for NTSC/PAL and DV/DV Widescreen are also what you want.
http://support.apple.com/kb/HT1502?viewlocale=en_US

One of the folders on my external hard drive has transformed into a unix executable file and I can no longer access my files. Is there any way to save the data?

One of the folders on my external hard drive has transformed into a unix executable file and I can no longer access my files. Is there any way to save the data?

Wow, have seen Files do that, but a whole Folder as I recall!
Could be many things, we should start with this...
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair. Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)

Recently upgraded Mac 24" to Lion (clean install) and now no external hard disks work with Time Machine

Recently upgraded Mac 24" to Lion (clean install) and now no external hard disks work with Time Machine.
installed new internal disk first with fresh 10.7.3 Lion software. Also upgrade ram to 4GB. Work great, super fast.
BUT.... my WD 1TB firewire400 external disks no longer work with the Lion enabled machine now.
FURTHER... I read somewhere that WD is problematic with Lion but Seagate was not... so I went and bought a new 3TB Seagate GoFlex.
When it didnt work properly either, I patiently searched and found a software/firward upgrade and applied.
I re-partitioned disk to extened/journaled standard, etc.
Then assigned the particition to Time Machine. Drive turned the blue/grey color, so I thought it would work.
But, it has now been in "preparing" mode in Time Machine for HOURS....
What is up Apple? So dissappointed. Ive read these type of problems are notorious with Lion and I wish I never upgraded.
Are you trying to make issues with External disks, to drive people to iCloud? That trick ont work in me. I will not reward bad behaviour Apple.
Please provide a fix... I wasted hours/days screwing around with this, instead of using the Mac for what its intended!

Solved by Pondini, on another thread I opened...
Answer:
Sounds like either:
A directory problem on your internal HD. Verify your internal HD, and Repair any other volumes being backed-up per #A5 in Time Machine - Troubleshooting.
Something in OSX may be damaged. You've tried the "combo," so a fresh copy of OSX (that won't disturb anything else) would be worth a try (and you don't need a tech for that). See Installing the ''combo'' update and/or Reinstalling OSX.

External Hard Disk has become undetectable

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