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I accidentally disconnected my G-Raid drive and Mac no longer recognizes it.

I accidentally pulled out the FW400 cord without meaning to and when I reconnect it will not recognise on my Mac.There is no physical damage and on a previous occasion when this happened - some years ago - I simply reformated the disk and it worked fine - though ofcourse I lost all files on it. IT's a 750GB GTech dive. This time I can't afford to lose the files. I've tried First Aid in Disk Utility with no joy. Is there some free software which would fix the file/s that have been corrupted? Tom - thomas.hamilton65@btinternet.com

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  • GTech Master
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Connect the drive, select Utilities and click Disk Utility, select the drive that is not working and click Mount.

Posted on May 01, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

SOURCE: After blackout Mac-formatted ext. hard drive won't mount says its pc-formatted

Here is my best guess and strong suggestion. First do nothing else until you have your work off loaded to some other drive or media....and I mean do nothing....don't even turn it off until this is completed. Once that is done verify your work is there. Then learn to smoke or drink and sing hallelujah.

My best guess is you lost the FAT (file allocation table)...meaning it got (literally) zapped by the power failure (spike) which makes sense since it's continually being accessed. Lacie should have a disk diagnostics program on their website....that loaded onto a diskette or cd would be my first step. It will tell you if the drive is good or not. If good and after you have off loaded your files to a safe media then the fastest solution is probably to reformat and reload your applications then reload your files. I say fastest as (in my twilight years) I have almost (it's a pride thing) given up solving hard problems the hard way...particularly when they can be both hardware and software interrelated.

A couple of other points....uploading to the net your files (even if it costs) or using a bit torrent to transfer to a friends machine (pay for the other drive) or using raid (which I am not a big fan of) or copying them to a one touch....(possibly the least expensive solution (just start it at night...it's not fast the first time and do it daily). You have too much invested to get had by Mother Nature.

Why would I tell you this....well, there was the time I worked all night to finish some code and just as I finished (without saving once) and feeling satisfied I stretched back, extended legs and knocked the plug out of the socket. I also had a computer shop
wipe my disconnected spare duplicate drive at the same time they wiped my master. Today, and I have multiple large projects I work on (mine...not others), and despite more backups in more ways than you can imagine I am still subject to bouts of paranoia.

Lastly....Am not up to date with Mac but at some of the freeware sites I have run across utilities that might be of help. Trying to restore the fat (Windows keeps two copies) might be a possibility and I assume Mac has something similar. But I would only attempt this based on what the drive diagnostics results are....i.e. if you have more than 4 bad clusters it's probably not worth taking the chance of another major disruption. Hope this helps or at least points you in the right direction. Tango

Posted on Jan 25, 2008

  • 1 Answer

SOURCE: No external drive icon on desk top

This happened to me as well - i have been reading that it could be the power supply adaptor. If you can try another one - it might solve the problem. The adaptors seem to either be faulty or made to stop working. Great news for us the consumer!!

Posted on Dec 16, 2008

danielizapat
  • 87 Answers

SOURCE: Iomega 500 gb external drive no longer mounts on mac os x tiger

ok I have had probs like this before. try plugging it in to different usb ports. also try another cable is it usb? or fire wire? I have had issues with several items doing the same thing I just try different cables and different ports and keep un plugging and plugging it back in. usually either a dif port os cable solves the issue. also try connecting it to another pc and see if u can access it. If you can access it from aonther pc that you have in your home or access to all the time I can tell u how to have it hooked to that pc but be able to access it from the origional pc that you had it hooked to.

Posted on Sep 24, 2009

Testimonial: "I will try some of these suggestions. I've already tried hooking it up to a PC at work (unrecognized completely) and a mac powerbook - won't mount."

bob_computer
  • 3153 Answers

SOURCE: WD My Book Not Recognized

One or more of the hints below will probably sort out most USB problems with most USB portable / external hard drives and OTHER devices (though not always)

A few things to check but assumes USB and Windows for other interfaces / operating systems (mac/ Linux) similar steps may be adapted to suit.

1. Ensure it is connected directly to the computer to a USB 2.0 port not a USB 1.0 port as this can have effects on performance and reliability

2. Use only the cables that came with it NOT one that fits that may have been lying around or is longer. Not all USB cables are equal even though they should be)

3. Do not connect through an external USB HUB unless that hub is USB 2.0 AND has its own power supply.

4. Use ONLY the power supply that came with it if it has an external power supply Don’t use any other unless you know it has both the same voltage and current rating e.g. 12V 500mA anything rated below that would not work properly.

5. Always use the same port for connecting your devices. Some devices do not like being switched about. If switched they may want to install software / drivers again. This can be especially true if you move a HUB to another port
6. For FLASH DRIVES you should ensure that the device is set for "quick removal" using the drive control panel properties or use the USB "Safely Remove Hardware" option. If you dont do this there is a very strong chance that any files you transfer may not be there when you plug into another computer.

If you checked and fixed anything there and still have issues then check your hardware from CONTROL PANEL / SYSTEM / HARDWARE.
Any exclamation marks by hardware need fixing before you investigate any further

USB flash drives can fail for no apparent reason.
Sandisk Cruzers are especially bad for this.

USB hard drives should be treated with extreme care.
This is a real hard drive ! and knocks and bumps can quite literally kill them.

It is possible to remove drives from the enclosures in most cases and connect directly inside a PC to fully check it.
You should also do this to cheack the drives connections are not bad inside the enclosure

Note that if you hear a drive clicking or pinging this could be the worst thing you would hear.
Known as "The Click Of Death"

If none of the above steps help look at updating the drivers from the manufacturers web site in the support section

Posted on Oct 02, 2009

  • 126 Answers

SOURCE: Mac not recognizing External Western Digital HD.

the problem is that your western digital operates using the NTFS (New Technology File System) which is the standard file system of Windows. Apple macs is not interopable with native NTFS therefore you need to install a read-write NTFS file-system driver on your mac.

an excellent free mac NTFS driver can be found here-
http://mac.softpedia.com/get/System-Utilities/NTFS-3G.shtml

download and install the software then restart your mac.

//javaftper

Posted on Jul 31, 2010

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