USB Drive Dropping

I just bought a 1TB Hitachi USB drive, mainly for use with Time Machine. I have the drive partitioned roughly 50/50 between a TM partition and a standard drive partition for sharing. I initially had problems with getting TM to work with it until I reformatted the drives with the right options (GUID table?). Since then TM has worked without issue. Now I'm having a problem where intermittently (every 15 minutes) the drives unmount and remount, giving the standard error message about not removing devices that have not been unmounted properly. I've already tried resetting the PRAM to no avail.
Any suggestions?
Message was edited by: superslomo

I think you are right Sonny. I returned the Hitachi HD for a WD "my Book essential edition" 1tb HD. After plugging it in I did the Partition/GUID and erase using disk utility. I then turned Time machine on and it did a backup at the next scheduled time. It took longer to create the backup than the first time but everything went smoothly and the drive hasn't unmounted or done anything out of the ordinary(touch wood). Hopefully I am done as Time Machine, like its name, so far has taken up a good deal of my time just trying to get it up and running correctly.

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Booting from a USB drive

I have an urgent problem.
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You need to partiton and format the drive properly for OS X. You then need to install OS X on the drive using a version that can boot the computer.
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Hi All,
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Use OS X' Disk Utility to burn it to a CD.
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When I try to format an external usb drive the progress bar gets to half way then freezes , or stops and what ever time I allow it never gets any futher on , I have to go to the task bar and click quit to get on and the usb drive is not formatted is there a fault with my disk utility program I have updated the system
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Macbook 2012 not booting from internal drive but booting from external usb drive

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Must be a bad SATA cable undetected by Apple Techs. A result of the drop but they are also quite fragile.
Disturbing the cable can cause it to work for a while. Cheap repair at iFixIt.

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Hello shaibalghosh,
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Click " Like " if you want to Thank someone.
If Problem Resolves mark the post(s) as " Solution ", so that other can make use of it.
Click " Like " if you want to Thank someone.
If Problem Resolves mark the post(s) as " Solution ", so that other can make use of it.

Convert music from USB-drive to iTunes on a new iMac

Hi, I just got a new iMac, and I used Windows before.
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(72563)

USB Nugget 3 of n: Unifying the multitude of USB driver Subsystems

So here we are for another little USB Nugget.
A lot of time has passed since the last one and also a lot of work has gone into this post (or the VIs being attached).
During my other Nuggets I have become less than enamoured with the VISA interface to the USB bus. I find some of the terminology rather confusing and the lack of examples doesn't help either. There have also been an increase in questions in the forum regarding HID USB communication and the like.
Having recently (timeframe 2 years ago) goten "into" LVOOP, I thought developing a LVOOP framework for USB communications would be a beneficial thing to do. The ability to have different classes of devices (or device requeasts) inherit from one another coupled with the ability to have "hot-swappable" USB subsystems drivers via object componsition made me want to write such a software. Well I did, and here it is in it's completely unfinished glory. This software has become a bit of a nightmare for me. I see that it could very well have a use for the community but I've invested a lot into it to make it work so I'm a bit hesitant just giving it away for free (I earned my money with LV software consultancy for a few years). But it being Christmas and all I'm showing me good will to all men (and women) by just releasing it and hoping for the best.
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So what are we to do with this?
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Shane
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