Hello, and welcome to JustAnswer.com!My name is XXXXX XXXXX I'm here to help.
Try reseting the PRAM, by holding the P+R+Option+Command keys together while restarting. Hold them for 1 full restart, then let the computer start up like normal.
Hi Jesse, thanks, XXXXX XXXXX not work, the hard drive still unmounting by it own. After do what you want me to do, the computer restarted and while was restarting the computer read the disc and show the disc as mounted, and then suddenly unmount the disk again.
Jesse?, are you still there?
I think you should know, the disk utility can see the disk, If I want I can force mount the disk from this utility but the disk will unmount after 15 to 20 second
Sorry for the delay.
Open Disk Utility again, and run the Repair Disk option on the external hard drive.
but, this disk has my time machine information, and was pretty good before updating, and I tried with other external disk and the same behavior happened. Are you sure should I repair my disk one, disk two and my card reader?, all this devices has the same behavior.
Okay, lets do the following first then:
1. Open System Preferences (located under the Apple menu in the upper left corner of your screen).2. Select the Energy Saver pane.3. Make sure the "Put hard disks to sleep when possible" option is unchecked.
ok, I did it, wait for mounting but nothing happened, I got to disk utility, I mounted and 20 second after unmount by itself. Is important to know that the disk unmount itsefl even when I´m using it,
would you like to have access to my machine though team viewer?
my machine is in set in spanish
Okay, it may not seem important, but lets run the Repair Disk in Disk Utility for the external drive.
But I must perform this action to my all three devices, right?
repair disk will erase or change the information inside my disk?
Repair disk won't have any effect on the data on your drive. It only repairs an issues it finds, it doesn't touch the information.
will it take long time? one of my disk is 1.5T
No, shouldn't take more than a few minutes
well, it has been 5 minutes from I started
A image of my computer http://goo.gl/PLnNR
Okay, let me know if it finishes without disconnecting.
well, the disk never disconnected from the disk utility, at least it always shows
Okay, You won't be able to repair the USB card reader, as its not a drive, but is the drive staying connected now?
the usb card reader has the same behavior,
But the hard drives don't?
the utility disk can see the hard drives, i can mount the hard drive from the utility disk, but 20 second after the drives unmount by themself
the same for the usb card reader
the disk still "repairing"
should I stop the "repairing"?
Not necessarily, what step is it on?
"verifying system files", the first step
I can grant you access to my machine via team viewer if you want, I think would be the easiest way, what do you think?
Okay, let's give it a try.
ok, you must install teamviewer, perhaps you know this.
the access code is XXXXXXXXX the password XXXXX XXXXX
You'll need to type the access code with a space between each number or letter
please let me know when you are in, I´m from another computer
Once you retype the code for me, i should be able to get in.
the data on the hard drives is the work of my entire life, :-)
i don´t have any backup more than this
Okay, I'm remoted in.
Do you mind changing the language to English, or do you mind if I do?
no I don´t mind, you can do it
or want me to do it for you?
did you went out?
It's fine, from looking at things the most I can do is run the Disk Utility as well. Everything else is up to date, and looks fine.
I'm going to Opt Out so another expert can assist.
ok, thanks Jesse
Hi David, thanks for your help.
In safe boot, my hard drives mount and keep mounted, all stay connected
What´s next? :-)
Hi David. I did what you suggets, bott in safe mode, but the same.
During your time off, I reinstalled the OS. The genius bar told me to do this, but the same....,
It did work OK once in safe mode just for 60 seconds. Then I restarted and the same problem.
I´m trying connecting them via utility disc, but once the disc is mounted, 15 second after unmounted itselft.
I f you want, I can grant you direct access to my computer via team viewer
Thanks for your patience too.
I hold Shift key at startup and the computer after two minutes unmounted the drives.
I restarted the computer in normal mode, and the drives keep connected one minute.
Yes, the drives work perfect.
Just to be clear, I have two disc and one card reader, none of then work after I installed (update) to mountain lion days ago. The disc and the card reader work perfect in other computer.
When the computer is in the process of restarting, and then I can see the desktop, I can see the disc mounted but once the process of restarting is almost over then de mac sudden unmount the disc and the card reader.
When I´m trying "Preference Error - Could not load Users and Group preference panel"
It did not work neither in safe mode or normal mode restarting
There is no updates availables
Don´t worry David, I´ll do whatever you want me to do.
Late yesterday night I did this that you are suggesting me. I will take so long, where I´m takes around 8 hours (downloading).
Do you want me to send the console log?
Hi David, i did not work, but I solve my problem uninstalling my antivirus
Thanks!!!, tell me how I pay your time?