Usb hard drive not loading after security update

usb hard drive not loading after security update
I can't seem to find any other posts about this problem.
I have three external hard rives connect by a USB hub to my iMac.
Problem is that if I turn on the hard drive(s) AFTER start up I get a message that the drive either was not recognized by the OS or that it was ejected unexpectedly.
I get the same issue but not all the time if I turn them on before I boot the iMac.
I used the disk drive utility to "repair" the drives but they always come back as "probably ok".
If I restart the iMac with the drives connected (on), it seems to work but not all the time.
A bit annoying as I am wondering if the drives are OK or not.
I don't always need the drives as they are for backing up images from my camera using Apreture.
This all began after i did the latest security update.
is the update to blame?
mahalo.

Yes, you can still use those instructions to reset the PRAM.
You said that you booted to your install disk and that your primary drive did not show up at the Select a Destination screen? That usually means that the computer is either not recognizing your partition, or it's not recognizing the hard drive itself.
Start with this article and follow all the steps even if you already tried them. I suspect that you'll get to step 4 and you'll end up having to call Applecare. If you haven't done those steps, they're most likely going to make you do them anyway, so you might as well get them done before the call.

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K7T Turbo 2 kt133a
I bought a new chip a while back and therefore updated my bios.
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Hi
jumpers should be right
the top HD (on the end of the cable) is l:::
and the bottom (slave i assume) is ::l:
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Hello -
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Free Solution:
Sure there's a »fix« with Apple software. You'll need to install the Developer Tools (Xcode) from the Snow Leopard Install DVD, though.
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External Hard Drive not mounting after...drop

Hi all,
Not really a Time Machine question, but my wife, not realizing an external USB hard drive was connected to my macbook, pick up the laptop and the external drive dropped on it's corner...slight damage. It is a 320Gb hard drive with three partitions....two for storage and one for time machine backup. The two storage drives are mounting find and seem OK, but the time machine partition is not mounting. Disk Utility sees the partition but can't mount or repair it and gives me the error "Invalid sibling link, unable to verify or repair."
Any ideas on what I should do next (other than back up the other two drives)? Should I try erasing the disk and see if it'll mount?
Thanks,
John

Johnk93 wrote:
Disk Utility sees the partition but can't mount or repair it and gives me the error "Invalid sibling link, unable to verify or repair."
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Long term, though, I'd be a bit reluctant to trust my backups to it. (Perhaps a hint to Santa?)
Additionally, I am having trouble ejecting the two working partitions. It seems to eject them becuase they no longer appear on my desktop, but I get the "unable to eject...." error message. Not sure what this means.
See what happens after erasing the TM partition. That may clear it up. If not, try mounting them again.

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MacBook Pro 2009. 250 SD, HD 8Gb Ram.
I have had this issue for about a year...with no resolve!
Apple and the User community have not been able to solve issue.
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Weilishu wrote:
Thanks for the response. However, I'm not sure what you mean.
So far my experience is far from "Just connect the external hard drive to the USB port on the back of your AirPort Extreme and — voilà".
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I have a mac mini 10.5.6 (1.83 GHz Intel Core 2 Duo) and I run the Time Machine function to an external usb hard drive. The hard drive worked fine (plugged into the usb port on an older keyboard), but I went out and bought a new aluminum apple keyboard (because they look so cool ^_^ ) - I plugged the external usb drive into the keyboard and it wasn't recognized, so I tried plugging the external drive directly into the mac mini, but it is still not recognized. It is not showing up in Disk Utility or in System Profiler
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I tried restarting the computer without the alu keyboard plugged in, but same problem of no drive showing up.
Here is what System Profiler has to say about my drive:
USB2.0 Storage Device:
Capacity: 93.16 GB
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk1
Product ID: 0x6830
Vendor ID: 0x04b4 (Cypress Semiconductor)
Version: 0.01
Serial Number: DEF107920F07
Speed: Up to 12 Mb/sec
Manufacturer: Cypress Semiconductor
Location ID: 0x3d130000
Current Available (mA): 100
Current Required (mA): 0
Mac OS 9 Drivers: No
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Not Supported
Volumes:
USB:
Capacity: 92.84 GB
Available: 53.14 GB
Writable: Yes
File System: Journaled HFS+
BSD Name: disk1s2
Mount Point: /Volumes/USB
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Sorry I'm not terribly helpful - Thank you!
Dr. E

USB hard drive not detected on reboot

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The hard drive is formatted for HFS+ and I am running Mac Drive 8 to detect it in Windows.
For some reason when I reboot (in Windows), the hard drive won't be there until I unplug it and plug it back in.
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HELP =T
Message was edited by: PTHEOFYL
Message was edited by: PTHEOFYL

I am having the exact same problem. WD 1TB Passport. USB 3.0 drive. Running on Windows 7 Pro 64 via Bootcamp.
My 1TB Passport is formatted with FAT32 and works with Windows and Mac OS.
I was getting the same problem when I was running Windows XP Pro on the same MacBook Pro. I was hoping the upgrade to Windows 7 would remidy the issue but it did not.
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Hey coby,
Well thanks for the star. Not sure I deserve it.
i then tried connecting the drive to each USB port again, and voila! i have found one it works in. I guess my computer's ports must be a little worn.
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i was starting to think i would have to go out and get a USB hub to give it some more power.
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Usb hard drive not loading after security update

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