Unreadable Disk Util shows 4.14 GB drive is 1.5TB

Unreadable Disk Utility is showing that one of my internal drives is 4.14 GB when it is really 1.5TB. Drive may have failed, when I restart computer, drive clicks a few times and error message Disk Unreadable, Initalize, format ignore comes up. Before I trash it I wanted to be certain there is nothing else I can do. This drive is not the start-up disk and "has" SnowLeopard Partition. MacPro start-up disk is running 10.7.4 I have moved it to other bays - no change. No back up and it doesn't contain critical data, but if I can get the OS with my user settings or even just my user folder off of it I'd like to try before trashing it.
Disk Utility and Disk Warrior did not help
gpt recover: unable to open device '/dev/disk0': Input/output error
Any suggestions? Or is this drive done?
Thanks
Betsy

Reformat zero the drive.
then in the future alawys clone and use TimeMachine

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Disk Utility 13 problem with USB drives

There appears to be a problem with Disk Utility 13 (part of OS X 10.9). At least, so far as I can tell, everything traces back to this app, or possibly OS X 10.9 itself.
I recently upgraded my MacBook Air to OS X 10.9 (reformatted hard drive, installed system from scratch, updated with all the latest Apple updates). I pre-checked all my third party software to make sure it was 10.9 compatible before installing it after the system cleanup, so everything I’m running supposedly has been approved as safe for 10.9. But I’m seeing a problem formatting USB drives that I do not encounter when running under 10.8.
I have a Seagate STAA500101 (“FreeAgent GoFlex”) drive connected via Seagate’s USB3 adapter that I’ve used for some time as a Time Machine backup. Post-overhaul, I decided to erase the backup and start fresh. When I attempt to format it (single GUID partition) with Disk Utility, I see the following messages go by:
Formatting disk1s2 as Mac OS Extended (Journaled) with name Untitled 1
Could not mount disk1s2 with name (null) after erase
Then there’s a pause, and the format appears to conclude fine. But if I run a “Verify Disk” immediately, I get this:
Verifying partition map for “Seagate FreeAgent GoFlex Media”
Checking prerequisites
Checking the partition list
Checking for an EFI system partition
Checking the EFI system partition’s size
Checking the EFI system partition’s file system
Checking all HFS data partition loader spaces
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Problems were found with the partition map which might prevent booting
Error: Partition map needs repair because a data partition needs loader space.
As the drive has just been formatted, that seemed odd. I took it over to another Mac still running 10.8.5 and formatted it there — it worked just fine. Verified just fine. Took the drive back to my MacBook Air and tried to verify the disk — same failure.
I wanted to rule out bad media, so I took a Lexar 16GB USB flash drive and tried to format it with Disk Utility 13 — got the same problem.
The only success I’ve had formatting USB drives under 10.9 is to boot up into OS X Recovery. Disk Utility there formatted my Seagate drive without an error. But once I booted back into normal 10.9 operating mode, the drive once again fails to verify; it makes me leery about using it as a Time Machine backup.
I suppose it’s possible there could be some background component like Sophos causing problems when formatting drives, but if I format a drive via OS X Recovery or another Mac under 10.8, that wouldn’t explain why the drives fail to verify.
Anyone got any other observations on this issue?

Problem resolved. I'm posting this note for anyone else who might run into this situation and come across this discussion.
It actually did turn out to be Sophos -- Cloud, that is. I'd been using Sophos' free Mac antivirus software on a variety of systems but forgot that I was now testing out Sophos Cloud on my own MacBook, which is their new endpoint solution, and supposed to be compatible with OS X 10.9 (although the Mac version is listed as "beta") Sophos Cloud includes a new feature called Device Control which allows you to create a company-wide policy to control access to hardware such as USB drives, optical drives, etc. But apparently it's still pretty buggy. I had my Device Control configured with the default setting of "monitor but do not block" but it was most definitely gumming up the system. With Sophos Cloud installed, here's what happens if I try to run "Verify Disk" on any attached drive. Note on the left side how "disk2s2" shows as a sub-volume for each hard drive.
So if I uninstall Sophos Cloud, reboot and rescan, here's what I get:
Works fine. Note that the "disk2s2" subvolumes are also gone. This is the way Disk Utility also appears on a 10.8 or 10.9 system, even if you have the standard free Sophos for Mac software installed. It's only Sophos Cloud that's not playing nice. It also appears to have stopped me from being able to play DVDs from an attached Apple USB SuperDrive -- that problem was likewise solved by removing Sophos Cloud.

Disk Utility shows Disk1, not mounted, and no further information???

Disk Utility shows my correct disk partitions in the top section (my hard disk with two partitions and my superdrive). In the lower section, however, there is a "disk1" which shows no information. Under that is another "disk1" which shows only 'Not mounted' for 'Mount Point:' and '0 Bytes' for 'Capacity'. All other lines only show dashes.
I looked at my /Volumes folder in Terminal. It shows four entries:
x MPBWinXP - which is my boot camp partition
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x administrator's Public Folder - hunh?
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I never received a reply to this, so I'm marking it as 'answered' just to close it out.

Disk utility showing recover partition but not main partition

I have a Macbook Pro A1278 that has been dropped. I pulled the hard drive and ran seatools on it to verify it has no physical defects. The disk utility shows the recovery partition but not the main partition. It infrequently will boot to the users partition. I usually get the flashing folder with a question mark in it. What is the next step to try to backup the data on the drive and reinstall OS X.

bendold wrote:
I booted into the disk utility
It would be really helpful if you would answer the question as I asked it
Last time
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Yes or No

OS X Disk Utility not recognizing Seagate 3TB drive in dock

Model Nhjgjhgjhgh
OS X Disk Utility not recognizing Seagate 3TB drive in dock
Been scouring the webs and can't quite figure this one out.
I just purchased a Seagate 3TB drive intending on using it for Backup.
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Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro10,1
Processor Name: Intel Core i7
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It could be a hardware failure. If Disk Utility can't see the drive, usually the directory is so badly damaged that it doesn't show up, or it could be hardware. I usually turn to a 3rd party utility called Disk Warrior. Its saved me a bunch of times. I have seen it bring drives back to life that I was pretty sure were gone. http://www.alsoft.com
Can you verify that the drive is running? Can you hear it spin up?
Its not clear to me if you are saying that you tried 3 different hard drives, is that correct? Internal or external?

I used a partitioned HDD for time machine, using a partition already containing other data files. I am now no longer able to view that partition in Finder. Disk Utility shows it in grey and "not mounted". Any suggestions of how to access the files?

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Now
Have you tried to repair the disk yet

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Running mid-2010 MacBook Pro 13'' with OSX 10.7.5.
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Running mid-2010 MacBook Pro 13'' with OSX 10.7.5.
So, like many who have tried to install the new update, mine says it cannot be installed due to a damaged Macintosh HD. Attempting to fix it through the Disk Utility available during the install allows me to Verify Disk. I get an error that it needs to be repaired, but the repair option is greyed out. Booting it into Recovery and using Disk Utility again shows a damaged disk, but this time I can repair it. It repairs and everything reads as fine; even verifying the disk again shows that the system is fine. This is where it gets screwy.
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After i enter my password for the wifi in internet recovery mode it just shows a blank screen no disk utility shows why??? NEED HELP

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Enter your admin passwrod, not Wi-Fi network password.

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https://discussions.apple.com/thread/4467217

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thank you,
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Hello RalphR_MI,
Take a look at this page, which lists several articles. Please let me know if any of these help you restore your backup.
Also, take a look at this article, as well as this one.
I hope this helps. I'm not sure of a few things, so I'm sorry for sending you so much, but I'm confident it will give you something new to try.
Please let me know if this helps. Good luck!
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Unreadable Disk Util shows 4.14 GB drive is 1.5TB

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