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Zimmer1956 Level 1 (0 points)

Using IMac intel 27" with 10.8.3.

I have two brand new 1TB G-Drive Genartion4 external drives, one for Time Machine and the other for CCC clone. The first drive is into the IMac with FW800 and the opther is daisy chained into that drive with FW800.They worked fine but suddenly message that both Time Machine and CCC couldn't be used because they were unwritable. I used Disk Utility and Drive Genius3 to check/repair permissions and reformatted them. They worked for a day or two and received the same error. I even went back to the disks and manually changed the settings making writable for everyone. That dis not work


Called G-Drive and the support team had me eject them and unplug the FW800 and plug each in one at a time. That worked and the next day both drives were unwritable again.  I have repartitioned these about 5-6 times and the problem continues. I have a call in to their tech support and communicating with support from Hitachi through email. In his last emai probably before they closed yesterday, he suggested it might be an OS issue. I sent the IMac info and expect to hear from him Monday.


I will call Apple support on Monday. In the meantime, is there anyone who have had this issue and have knowledge of what might be the OS issue and is this something I can fix myself? Is it just this Mac and G-Drive or have others had this same problem? Would appreciate any suggestions or assistance anyone can give me.



OS X Mountain Lion, two 1TB external hard drives
  • BDAqua Level 10 (122,202 points)



    Does it ever happen if they arent Daisy chained, using just one at a time?

  • Linc Davis Level 10 (192,275 points)

    First, back up all data and then remove the worthless "Drive Genius" product according to the developer's instructions. That alone might solve your problem, and even if it doesn't, you'll still be better off.


    Otherwise, the drives are malfunctioning. Many others have reported problems with those drives. Try connecting one at a time and test.

  • Zimmer1956 Level 1 (0 points)

    G support had me install one disk at a time and because the Mac has only one FW800 port, after one was plugged in they had me plug the other into the back of the first drive. I guess I could try one directly to the computer for a day or so and see if that works. If that's the case, guess need a FW800 hub?


    I only used Drive Genius yesterday as a last resort so I am sure that is not the issue.




    Message was edited by: Zimmer1956  I am open minded and wondering what is wrong with Drive Genius4? Anybody else have an issue with it - would appreciate comments and suggestions for other drive monitoring software?

  • Linc Davis Level 10 (192,275 points)

    How to maintain a Mac


    1. Make redundant backups, keeping at least one off site at all times. One backup is not enough. Don’t back up your backups; make them independent of each other. Don’t rely completely on any single backup method, such as Time Machine. If you get an indication that a backup has failed, don't ignore it.


    2. Keep your software up to date. In the Software Update preference pane, you can configure automatic notifications of updates to OS X and other Mac App Store products. Some third-party applications from other sources have a similar feature, if you don’t mind letting them phone home. Otherwise you have to check yourself on a regular basis. This is especially important for complex software that modifies the operating system, such as device drivers. Before installing any Apple update, you must check that all such modifications that you use are compatible.


    3. Don't install crapware, such as “themes,” "haxies," “add-ons,” “toolbars,” “enhancers," “optimizers,” “accelerators,” "boosters," “extenders,” “cleaners,” "doctors," "tune-ups," “defragmenters,” “firewalls,” "barriers," “guardians,” “defenders,” “protectors,” most “plugins,” commercial "virus scanners,” "disk tools," or "utilities." With very few exceptions, this stuff is useless, or worse than useless.


    The more actively promoted the product, the more likely it is to be garbage. The most extreme example is the “MacKeeper” scam.


    As a rule, the only software you should install is that which directly enables you to do the things you use a computer for — such as creating, communicating, and playing — and does not modify the way other software works. Use your computer; don't fuss with it.


    Never install any third-party software unless you know how to uninstall it. Otherwise you may create problems that are very hard to solve.


    The free anti-malware application ClamXav is not crap, and although it’s not routinely needed, it may be useful in some environments, such as a mixed Mac-Windows enterprise network.


    4. Beware of trojans. A trojan is malicious software (“malware”) that the user is duped into installing voluntarily. Such attacks were rare on the Mac platform until sometime in 2011, but are now increasingly common, and increasingly dangerous.


    There is some built-in protection against downloading malware, but you can’t rely on it — the attackers are always at least one day ahead of the defense. You can’t rely on third-party protection either. What you can rely on is common-sense awareness — not paranoia, which only makes you more vulnerable.


    Never install software from an untrustworthy or unknown source. If in doubt, do some research. Any website that prompts you to install a “codec” or “plugin” that comes from the same site, or an unknown site, is untrustworthy. Software with a corporate brand, such as Adobe Flash Player, must be acquired directly from the developer. No intermediary is acceptable, and don’t trust links unless you know how to parse them. Any file that is automatically downloaded from a web page without your having requested it should go straight into the Trash. A website that claims you have a “virus,” or that anything else is wrong with your computer, is rogue.


    In OS X 10.7.5 or later, downloaded applications and Installer packages that have not been digitally signed by a developer registered with Apple are blocked from loading by default. The block can be overridden, but think carefully before you do so.


    Because of recurring security issues in Java, it’s best to disable it in your web browsers, if it’s installed. Few websites have Java content nowadays, so you won’t be missing much. This action is mandatory if you’re running any version of OS X older than 10.6.8 with the latest Java update. Note: Java has nothing to do with JavaScript, despite the similar names. Don't install Java unless you're sure you need it. Most people don't.


    5. Don't fill up your boot volume. A common mistake is adding more and more large files to your home folder until you start to get warnings that you're out of space, which may be followed in short order by a boot failure. This is more prone to happen on the newer Macs that come with an internal SSD instead of the traditional hard drive. The drive can be very nearly full before you become aware of the problem. While it's not true that you should or must keep any particular percentage of space free, you should monitor your storage consumption and make sure you're not in immediate danger of using it up. According to Apple documentation, you need at least 9 GB of free space on the startup volume for normal operation.


    If storage space is running low, use a tool such as the free application OmniDiskSweeper to explore your volume and find out what's taking up the most space. Move rarely-used large files to secondary storage.


    6. Relax, don’t do it. Besides the above, no routine maintenance is necessary or beneficial for the vast majority of users; specifically not “cleaning caches,” “zapping the PRAM,” "resetting the SMC," “rebuilding the directory,” "defragmenting the drive," “running periodic scripts,” “dumping logs,” "deleting temp files," “scanning for viruses,” "purging memory," "checking for bad blocks," "testing the hardware," or “repairing permissions.” Such measures are either completely pointless or are useful only for solving problems, not for prevention.


    The very height of futility is running an expensive third-party application called “Disk Warrior” when nothing is wrong, or even when something is wrong and you have backups, which you must have. Disk Warrior is a data-salvage tool, not a maintenance tool, and you will never need it if your backups are adequate. Don’t waste money on it or anything like it.

  • Zimmer1956 Level 1 (0 points)

    Thanks for the info, I will do this!


    One other question - I never had this issue with an OWC 2TB hard drive but it was one drive not two and probably the reason. I guess I would need a Firewire800 hub - someone from G-Drive told me about a Nitro hub...


    My assumption is this hasn't happened in the past with last drive because just one drive....any ideas?? Am I on the right track?

  • Zimmer1956 Level 1 (0 points)

    I don't have Disk Warriou I have Drive Genius3 from Pro Soft. Is this crap ware?

  • Linc Davis Level 10 (192,275 points)

    Yes, it's crapware, and yes, you're on the right track.

  • Zimmer1956 Level 1 (0 points)

    I have set up one drive for Time Machine and we test. If this fixes the issue what is suggested as a FW800 hub? GDrive mentioned a hub by Nitro AV good idea or not? Any other suggested?

    One quick additional question any comments on 1Password software?




  • Linc Davis Level 10 (192,275 points)

    If this fixes the issue what is suggested as a FW800 hub?


    I can't recommend any in particular. Check reviews on Amazon.


    One quick additional question any comments on 1Password software?


    Never used it. In general, I avoid all third-party system modifications, of which that is one.

  • BDAqua Level 10 (122,202 points)

    Hi DFon,


    I tried using 1Password, lol, I could never figure out how to use it, though I've seen many glowing reports on it!???

  • Zimmer1956 Level 1 (0 points)

    I set up one of the drives connected directly to my IMac using FW800 yesterday and noticed Time Machine ran twice yesterday afternoon and four times today. The other drive is not installed but I will eject this drive amd test the other drive?


    Just received the error message that Time Machine backup failed because the drive is inwritable!


    What next? Would you think that both drives are bad? Considering getting new drives and send these back but don't want to do that in case it is an OS issue and it happens on the new drives thinking about purchasing!?


    Any comments?



  • Zimmer1956 Level 1 (0 points)

    One other issue. If I replace them considering the mini but not happy with GDrive right now and replace with another. Is it possible this could be a GDrive issue this Mac will happen with any GDrive and not other brands?


  • BDAqua Level 10 (122,202 points)

    I've read mixed reports on G-Drives, no ral ides where the problem might be, but...



    Thunderbolt Firmware Update v1.2 Install/Troubleshooting Tips


    I have good luck with these, & their support is exceptional if you  have problems...


  • Zimmer1956 Level 1 (0 points)

    Iam told by GDrive support that they have heard that there were some changes in Time Machine in 10.7 and 10.8 with their Generation5 hard drives but I have a Generation4. I am calling Apple support to get an answer and will post if I get any answers.

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