Disk Utility missing the Erase tab

Tonight, I was attempting to reformat my Mac Mini FileVault encrypted hard drive. I have Mountain Lion 10.8 installed on it, and I have a bootable Mountain Lion USB stick.
I booted from the USB device, and first tried to format. Everything was greyed out. I had to "Unlock" the encrypted drive and then it was available.
I then tried to do an Erase, and it failed with an error I didn't catch, and then only "Macintosh HD" shows up (no volume below it in Disk Utility) and the Erase tab is unavailable. The Partition tab is also locked and nothing can be chosen.
I can Verify and Repair with no problems, but I am unable to repartition or erase the drive.
Any thoughts?

I ran in to this issue once again, when trying to clean install Mountain Lion on my MacBook. I rebooted to the Recovery partition, and tried to format/erase using Disk Utility and that failed and left the system where only the drive (Macintosh HD) would show up, and Erase was greyed out. I was unable to format using the command line due to seeing the message:
"The disk is in use by Core Storage as a Physical Volume"
I found a solution here:
http://apple.stackexchange.com/questions/59026/how-to-install-mountain-lion-on-a -disk-that-cannot-be-formatted-in-recovery-mode
See the post by Anderson, where he shows how to clobber this Core Storage volume:
Basically, you need to run diskutil CoreStorage list from Terminal. Identify the logical CoreStorage volume from that list and note the UUID string.
Then type diskutil CoreStorage delete UUID where UUID is the string you identified.
You can then partition with Disk Utility and run a Mountain Lion install.
This did the trick for me, and I was then able to 0-byte format the drive and do a clean install over the internet.

Similar Messages

Macintosh HD won't boot, but disk utility says "The volume Macintosh HD appears to be OK." How do I repair the hard drive?

I have a MacBook that needs its internal hard drive's Macintosh HD partition repaired, as the boot screen freezes on startup. I am running a separate, working mac OS from an external hard drive in order to run disk utility and repair the MacBook's internal OS. The issue is, it has dismounted the internal Macintosh HD partition, and won't remount. And in addition to that, the Verify Disk option returns with, "The volume Macintosh HD appears to be OK." I've run Verify Disk and Repair Disk a few times, all with that same result. And the internal OS still won't boot.
I have attempted to make a disk image of the internal Macintosh HD partition and save it to my external hard drive so I can wipe the internal hard drive clean and restore the image, but I receive errors when trying to create the disk image, and when trying to erase the hard drive (I know, I should try to erase the hard drive when I haven't made an image. When I tried to erase the hard drive, the image wasn't done and I thought it was. I got an error for erase, and I got an error for making the disk image) I have tried making a disk image multiple times and haven't been able to create one.
There is also a boot camp partition on the internal hard drive which is of no importance as to whether it stays or is erased.

Reinstall OS X without erasing the drive
Do the following:
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install the Combo Updater for the version you prefer from support.apple.com/downloads/.

Disk Utility failure to erase/initialize

I have a 1 TB WD MyBook Studio Edition. I sent this drive to a firm that does video conversions (from film to digital). Drive returned with expected (good) results, but now I can't write anything onto the drive - says I can only read. So I copied all files on the drive to another disk, then used Disk Utility to initialize. First Aid tab action buttons are all greyed out. Erase tab shows default format as MS DOS. I changed to Apple Extended (Journaled) and pressed OK. Process starts, but fails after a few seconds with error "Write Failure". Now disk won't mount when I attach it - only Disk Utility "sees" drive, but fails each time I try to Initialize/Erase.
What's up, and how do I correct?
Thanks

If you haven't fixed this yet, you may be able to use Disk Utility to completely erase and reformat the disk.
Click the top line of the drive, then the Partition tab. Click +1 partition+ (or however many you want) under *Volume Scheme*, then Options at the bottom. Select GUID for an Intel Mac, +Apple Partition Map+ for a PPC Mac. Setup the partition(s) you want to use on the Mac as +OSX Extended (Journaled),+ then click Apply.

Anyone clean their mac using the disk utility using the repair disk permissions??

anyone clean their mac using the disk utility using the repair disk permissions??

No. Threads don't hurt anything. If your computer is not functioning properly perhaps you need to try some basic maintenance. Let's start by having you do this:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Next, try booting into Safe Mode then immediately restart normally. Safe mode is going to take a while so be patient. It's slow.
Next, create a new user account. Log out of your account then log into the new account. Try using iPhoto and the publishing button. Do they work now?
If you still have a problem, then do the following. If you don't want to go through the above then just start with the following and forget the others above.
Reinstall OS X without erasing the drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.

Disk Utility hangs when erasing external disk

In Time Machine I wasn't able to figure out how to attach an external drive via USB. I guessed that it probably wouldn't work on a MS-DOS filesystem, so I started Disk Utility, which I never have used before. I have formatted disks before on Linux and on Windows, so it's nice to see a great app for this.
In the Time Machine brief help text, there is not mentioned what kind of filesystem that is required or if it work with any filesystem. So I searched, and it seems as if HFS+ journaled case-insensitive is the filesystem that one should choose. Can anyone confirm this?
When I click erase then the Disk Utility program hangs and I see the spinning beachball. The Activity Monitor program shows that disk activity stops after a few seconds. There is no more activity, so after 5 minutes I stop the program.
I have tried several times, and I see the same behavior. I even tried restarting the computer. But no luck.
Now my external disk no longer shows that it's a MS-DOS filesystem, but shows that it's HFS+ journaled case-insensitive. Probably not ok so far. I try creating a single patition, with format: HFS+ journaled case-insensitive, without OS 9 drivers installed. When I click apply then spinning beachball again and diskactivity stops after a few seconds, and I stop the program after some minutes where it has been inactive.
My guess is that the disk-erasing task failed and has left the disk in a broken state. During this task Disk Utility began to hang for a reason that I don't know.
My second guess to why the create-partition task failed, is that the disk is in a broken state, and thus the partition cannot be created, and Disk Utility hangs.
How do I format the external disk from the command line?

In Disk Utility, select the drive mechanism (not the volume on it) and click the Partition button. Use the Options button to choose the GUID partition scheme, then make one HFS+ (Journaled) volume.
There is no point in using the command line for this task, because if Disk Utility cannot deal properly with the disk, Mac OS X will not either. Disk Utility is using diskutil to do the partitioning and formatting.

Hard drive absent in disk utility - want to erase and reinstall MacOS

Hi there. Any help would be most gratefully received.
I have a Power Mac G5 Dual 2Ghz with 2GB RAM, one internal HDD (250GB serial ATA 7200rpm - the original one), two external HDDs and a Philips 170B display, running (or not) MacOS 10.39.
It was working fine yesterday but on startup this morning it hung for a while on the grey Apple logo and progress "clock" then froze on a blue screen.
I tried removing all cables except display and keyboard/mouse and restarted a few times but to no avail.
I tried entering safe mode but it wouldn't work. Upon subsequent attempts at startup it took me (instead of the blue screen) to the flashing question mark/finder folder screen.
I then booted from my install CD and tried to run Disk Utility to repair the disk. Disk Utility recognised the disk and allowed me to select it. But when I tried to verify it, it failed and told me to repair. When I tried to repair it told me "invalid b-tree node size".
I then tried running the Apple Hardware Test CD. It found no faults at all in the full test of the system.
All of my data is stored on my external HDDs so my next thought was to erase the internal HDD and reinstall my software. (I use the Mac solely for Video editing and the only applications I have installed - in addition to all the basics - are the Apple Production Suite.)
However, this time when I booted from the install CD, Disk Utility would not recognise the internal HDD. The only thing I had done since it had recognised it the last time was to run the Hardware tests. In addition, since running the hardware tests, the HDD started making a strange noise whenever the Mac was on - like clicking with almost beep-like access noises.
The last time I tried restarting and booting into Disk Utility, the clicking began again and then eventually stopped. But still no evidence of the drive in Disk Utility.
Soooooooooo. I don't need to save any data on the hard drive. I have all my software and OS discs. I just want to wipe the drive and start afresh (assuming this is the best course of action?). But I am unable to do so because of this new development in my attempts to fix the problem: the unrecognised hard drive (coupled with the strange noises).
If you have any ideas, please do get in touch. I'm pretty broke at the minute and I'm trying to find a solution without having to purchase a new drive. Obviously, if this is the only solution, then I'll have to bear that cost. But since it has recognised the disk just a few steps before, I'm hoping there's a way back.
Yours in optimism

I am not sure about battery, I still use G4 MDD which is unplugged for months, was always off at night (UPS was off) and still works.
But I would always use both SATA drive bays, and I think you need to invest in one or two new drives.
For now, try disconnecting your drive and see if you can boot from external drive and CD/DVD.
Also see if you can get into Open Firmware.
Resetting PMU would also be worth while when you get in to disconnect your hard drive (I think 3 yrs is more than enough for any OEM drive, too).
http://www.apple.com/support/powermac/

Are my photos completely gone if i went into disk utility and clicked erase, or can i recover them?

i wanted to put my macbook pro back to factory settings and re installl the disk. so i went into disk utility and clicked erase, after that i realized i did not put my pictures on my external drive and now i'm wonder even though i pushed erase in disk utility for my HD are my photos just gone off my computer and hidden in files that i have to recover. because i tried a few softwares that i downloaded and i found some of my photos but couldnt get them cause the software was a demo.
main question is even though i clicked erase HD and my pictures aren't on when i re install the mac DVD can i still recover them somehow??

I'm assuming that you were booted from the Mac install disk or recovery partition when you clicked Erase? (It's impossible to erase a disk you're booted from, at least using Disk Utility).
Do you have a backup of your computer, perhaps using Time Machine?
If not, and you still want to recover your pictures, first, STOP. Do not re-install Mac OS X. Installing the system and applications will overwrite your hard drive and potentially permanently lose your deleted files.
The only way you can retrieve your files is by using data recovery software such as Data Rescue. No, it's not cheap, but you have to decide what your photos are worth to you. You would need to run it from another Mac, ideally, and connect to your Mac using target mode.
If you're uncomfortable with that, you should seek a local reputable Mac/data recovery consultant.
The utility kaz-k points you to is not a solution to your problem. It's an Unerase Trash program.
Matt

Disk Utility hanging on Erase/Partition OR Howto backup a dual boot Mactel?

I'm trying to use Disk Utility to format an external usb hd as HFS+ for backing up my Macbook. Running 10.4.7 and Disk Util 10.5.6 (latest version afaik)
Problem is whenever I try to either Erase format a hard drive using my usb2 external enclosure, Disk Util just kinda freaks, not really doing anything, and after a minute or so becomes the program becomes unresponsive. Luckily the rest of my system keeps on working, and I can just force quite disk util. But when I try to shutdown/restart my system I'm forced to do a hard power down.
I've tried leaving Disk Util running overnight, thinking it was just needing a little extra time to get thru the process, but nothing changed when I woke. And a gave the macbook a good hour to shutdown cleanly, but it stays stuck with the blue screen and the spinning gray wheel at the very end of teh shutdown cycle.
Looking at the disk util log (after force quiting and restarting the util) it will simply say:
Aug 12 03:24:09: Disk Utility started.
Preparing to erase : “Mb”
Creating Partition Map
Aug 12 03:25:50: Disk Utility started.
I've also tried running disk util off the osx install cd (tiger 10.4.6), but i get what seems to be identical behavior, and i have to manually turn off the macbook.
I've tried this with two hard drives with identical results. In Windows (boot camp) im able to format the partition fine, but it only does ntfs because of the drive's size (and I'm not trying to use a windows fs anyway).
I plugged the usb hd into a powerbook, and used a 10.4.0 retail cd to run disk util (no hd in the powerbook) and its able to erase/partition the disks just fine. I can then plug them back into the macbook and theyre recognized just fine. But its PPC system and doesnt offer for gtp partitioning which I'm thinking will be a problem because ultimately I'm trying to use this drive to do bootable backups of my macbook.
I'd like to figure out what is wrong with Disk Util. But even if i get the partitioning working, i have the larger problem of -how- to backup the macbook's hd onto an identical sized hd (80 gigs), that will make both osx and windows bootable backups that I can restore off of.
One thought was to use the unix utility dd, and just do a bitwise copy of one disk to another. Any idea if this would work?
Another option would be manually creating the partitions myself, and then backing up each of the drives seperately. Not sure if I could even make a bootable backup of windows from within osx.
I know I'm not the only one running boot camp and looking to have reliable backups. What are other people doing to address this issue.
Ideally I would like to find a solution that:
*creates an identical disk with two bootable partitions
*can be automated, or at best a few simple steps that can be done once and then walked away from
Thanks for the help
macbook Mac OS X (10.4.7)

I'm trying to use Disk Utility to format an external usb hd as HFS+ for backing up my Macbook. Running 10.4.7 and Disk Util 10.5.6 (latest version afaik)
Problem is whenever I try to either Erase format a hard drive using my usb2 external enclosure, Disk Util just kinda freaks, not really doing anything, and after a minute or so becomes the program becomes unresponsive. Luckily the rest of my system keeps on working, and I can just force quite disk util. But when I try to shutdown/restart my system I'm forced to do a hard power down.
I've tried leaving Disk Util running overnight, thinking it was just needing a little extra time to get thru the process, but nothing changed when I woke. And a gave the macbook a good hour to shutdown cleanly, but it stays stuck with the blue screen and the spinning gray wheel at the very end of teh shutdown cycle.
Looking at the disk util log (after force quiting and restarting the util) it will simply say:
Aug 12 03:24:09: Disk Utility started.
Preparing to erase : “Mb”
Creating Partition Map
Aug 12 03:25:50: Disk Utility started.
I've also tried running disk util off the osx install cd (tiger 10.4.6), but i get what seems to be identical behavior, and i have to manually turn off the macbook.
I've tried this with two hard drives with identical results. In Windows (boot camp) im able to format the partition fine, but it only does ntfs because of the drive's size (and I'm not trying to use a windows fs anyway).
I plugged the usb hd into a powerbook, and used a 10.4.0 retail cd to run disk util (no hd in the powerbook) and its able to erase/partition the disks just fine. I can then plug them back into the macbook and theyre recognized just fine. But its PPC system and doesnt offer for gtp partitioning which I'm thinking will be a problem because ultimately I'm trying to use this drive to do bootable backups of my macbook.
I'd like to figure out what is wrong with Disk Util. But even if i get the partitioning working, i have the larger problem of -how- to backup the macbook's hd onto an identical sized hd (80 gigs), that will make both osx and windows bootable backups that I can restore off of.
One thought was to use the unix utility dd, and just do a bitwise copy of one disk to another. Any idea if this would work?
Another option would be manually creating the partitions myself, and then backing up each of the drives seperately. Not sure if I could even make a bootable backup of windows from within osx.
I know I'm not the only one running boot camp and looking to have reliable backups. What are other people doing to address this issue.
Ideally I would like to find a solution that:
*creates an identical disk with two bootable partitions
*can be automated, or at best a few simple steps that can be done once and then walked away from
Thanks for the help
macbook Mac OS X (10.4.7)

Disk Utility Error: The underlying task reported failure on exit 1

    #!/bin/bash
      # Author : Bill Hernandez
    # Location : Plano, Texas
    # Updated : Saturday, June 6, 2009 (1:48 PM)
    # script name : setdisk_ownerenabled
    # make sure to set permissions to execute
    <hr>
    # Description :
    <hr>
    # I've noticed that sometimes when using disk utility I cannot repair permissions, or I might get :
    # ERROR: The underlying task reported failure on exit 1
    # This shell script seems to have solved the problem.
    # It worked very well for me,
    # IF YOU USE THIS SCRIPT, IT IS AT YOUR OWN RISK...
    # DO NOT USE IT UNLESS YOU UNDERSTAND WHAT IT DOES
    # After running it, it is best to restart before using Disk Utility again
    <hr>
    # Details :
    <hr>
    # After partitioning a disk using "Disk Utility", and then begin using it, at some point I would get
    # an arror message when trying to save to one of the partitions, yet when I looked at the permissions
    # everything looked fine. I would then try to use Disk Utility to repair permissions and end up with a
    # cryptic error that pretty much told me nothing.
    # I noticed that while in Disk Utility, if I selected a partition the lower LH corner of the dialog
    # showed : Owners Enabled : No
    # I tried selecting the partitions at the Desktop and doing a (CMD-I) and at the very bottom of each
    # info dialog there was a checkbox :
    # [ ] ignore ownership of this volume
    # which I would check, even after logging in as root, and I couldn't seem to get a consistent way
    # to get rid of the permissions dialog failure, so I found the vsdbutil command which can be used
    # as follows to get partition, or disk info :
    # $ vsdbutil -c /Volumes/driveor_partitionname
    # ----> Permissions on '/Volumes/driveor_partitionname' are enabled.
    # if it is not enabled you can enable the disk or partition using :
    # $ vsdbutil -a /Volumes/driveor_partitionname
    # It will set "Owners Enabled : Yes"
    # This below script loops through the mounted disks, partitions, etc. and gives you information.
    # You can leave the three flags below all set to TRUE, or selectively use what you want and change
    # the rest to false...
    <hr>
    # CHOOSE {"TRUE", "FALSE"}
    <hr>
    getvolumestatus="TRUE"         # get "Owners Enabled : (Yes|No)" status
    setvolumestatus="TRUE"         # set "Owners Enabled : Yes"
    list_volumes="TRUE"                   # show volume names
    <hr>
    # DO NOT CHANGE ANYTHING BELOW HERE
    <hr>
    if [ $getvolumestatus == "TRUE" ]; then
     echo '============================='
     echo '$getvolumestatus'
     echo '============================='
     # get "Owners Enabled : (Yes|No)" status
     for i in $( df -l | sort -u | awk '{print $6}' | grep '/' ); do
     vsdbutil -c $i
     done
    fi
    <hr>
    if [ $setvolumestatus == "TRUE" ]; then
     echo '============================='
     echo '$setvolumestatus'
     echo '============================='
     sudo echo -n
     # set "Owners Enabled : Yes"
     for i in $( df -l | sort -u | awk '{print $6}' | grep '/' ); do
     sudo vsdbutil -a "$i"
     echo "setting Owners Enabled : Yes for ---> $i"
     done
    fi
    <hr>
    if [ $list_volumes == "TRUE" ]; then
     echo '============================='
     echo '$list_volumes'
     echo '============================='
     for i in $( df -l | sort -u | awk '{print $6}' | grep '/' ); do
     echo $i
     done
    fi
    <hr>


As it turns out, this didn't completely solve the problem, it solved part of the problem.
Here is a summary to the root cause of the problem.
SUCCESS...
Problem Summary : The system crashed and would hangup during boot, tried many things, until I eventually erased the disk and started over again.
iMacG5 24 GHZ Intel with One internal disk partitioned into 3 logical drives
Cub_1 OS X 10.5.7
Cub_2 OS X 10.5.7 (Carbon Copy Cloner backup of Cub_1)
Cub_3 OS X Server 10.5.7 (standard os x server setup)
At some point after setting up standard preferences, OS X Server crashed.
When I tried to restart, the machine would hang up during boot.
Finally after several attempts, ran Disk Utility from install dvd and repaired Cub_3
When I tried to run "Repair Permissions" on Cub_3 from install dvd, I got an error
Disk Utility Error: The underlying task reported failure on exit 1.
Rebooted, and started in single user mode (CMD-S) during boot until I saw the unix commands on the screen
RAN : root # fsck -fy
Then I began seeing the same command filling the screen :
posix_spawnp("/usr/sbin/mDNSResponder") could not find file or directory
Called Enterprise Support and spoke to Frank Alcorn, he said this was most likely a permissions problem and asked me to try repairing permissions from the install dvd. I told him about the error, but nevertheless I tried it again and got the same Disk Utility Error: The underlying task reported failure on exit 1..
He asked me to try booting into single user mode again, and to try
root # chmod 775 /
root # reboot
During the reboot process the machine got hung up again, and could not get the single user mode to work at all.
Frank said the command needed to be :
root # chmod 1775 /
Frank asked me if I had changed anything in file sharing, and I told him I had. He asked me what I had shared, and I said the entire drive Cub_3. He asked me what I had done for permissions, if I had denied permissions to anyone. I told him that I had set myself up as the only user that could have access to it, and when he said that's where the problem was the lightbulb went off, and it made sense.
Shortly after I set the sharing preferences is when the server crashed. It all makes sense now...
Frank said not to share the entire disk, only portions (share points) of it. I had done this in Panther Server, and Tiger Server and it worked fine, but apparently Leopard Server works a little differently, maybe more secure.
It seems to me that if sharing the entire disk, which is what I needed would cause such a problem there should have been some sort of warning from the operating system, but there wasn't. I had run into this problem several times over the past three weeks since I had started working with Leopard Server, but in each case I ended up re-installing OS X Server and starting over again.
I told him I would try to reboot from the OS X partition (Cub_1) and try it from there.
He asked me to let him know if it worked, and I said I would...
Problem FIX :
I booted back into the partition containing OS X (Cub_1) and did the following via the Terminal.
$ su - root
$ chmod 1775 /
$ reboot
During the reboot process I held down the (OPTION) key, and selected Cub_3 (the os x server partition) and sure enough after a few minutes of holding my breath the login window magically appeared. So I logged in, and did not have to re-install the server. Hallellujah....
This solved the boot hang problem. It is great to finally have an answer. In retrospect it makes sense, but that's why its hindsight...
The reason for sharing the entire disk in my mind was that since I was the only user on the system, it was easier to have one disk mounted on my workstation rather than several folders. It made sense to me, it still does. I don't need a bunch of folders, just one disk is easier...

My disk utility refuses to erase my hard drive

I've been trying for a few years to find some way to reset my mac to factory settings. Every last thing I've tried has failed. I was hoping the disk utility thing to erase it would work but the erase button never lets me to click on it

If you previously encrypted your hard drive (FileVault2) then your drive was enrolled in apple's CoreStorage format. If so, diskutility won't let you perform certain operations, and you'd first need to use advanced diskutil options from the command line ( $ diskutil cs delete ... ) to trash the CoreStorage volume.

How to restore macbook pro 10.7.2 to factory settings .. disk utility what to erase?

how to restore macbook pro 10.7.2 to original settings .. step by step.. in the disk utility what to erase?

If the computer came with OS X 10.6 Snow Leopard installed,
you have to erase the drive and install OS X 10.6 Snow Leopard.
You can buy 10.6 Snow Leopard disc from Apple Store for 20 dollars;
Apple Store: 1-800-692-7753.
Best.

My external LaCie drive gets an error message "the disc you inserted was not readable by this computer." The only options offered are "ignore" or "eject" Disk Utility sees the disc but does not give a repair option. What can I do?

When I plug in my external LaCie drive I get an error message "the disc you inserted was not readable by this computer."
The only options offered are "ignore" or "eject"
Disk Utility sees the disc but does not give a repair option.
What can I do?

The good thing about mac-centric resellers such as OWC, is they have people on staff that can answer questions without you buying things first. They also have how-to information, and instructions are included in many of their products. I saw a link to watch a DIY video in one of their pages; an example of a RAID (with its own power supply) is shown on their drives page. Also a few in there, with no power supplies, for less money.
If I were looking to backup and perhaps also have a partition for a system clone, I'd consider something like one of these: http://eshop.macsales.com/shop/firewire/1394/USB/EliteAL/eSATA_FW800_FW400_USB
Some ideas on the RAID backup methods appear in google search, some of the pages are ideas and concepts; and the better ones also warn about using RAID for the only backup plan.
Oh, OWC has live chat. Haven't tried it, nor have I bought anything from them. I have what appears to be two products from them, but have not used either. One is in a box as-new, but has only USB2.0 ports & my Macs needed FW400/800. It has been said their RAM is a good way to upgrade, too. But I can't confirm!
A 'RAID-ready' unit for backup may be more versatile for just that, but I have not checked into these details. I use single HDDs in powered enclosures, and usually manually make backup clones to FW drives, of bootable OS X systems. Some of the OWC raid-ready use eSATA ports so that may not be viable for a computer without them.
The unused in-box external drive I have is like the base model in the link above. However mine is USB2.0 (maybe) and won't boot my older Macs due to hardware variance; and my preference would be for FireWire options, these models do offer that. But the one I have does not. Dual 500GB HDDs, and they could be used in tandem as a RAID. That would be a choice set up in software. I'm not sure and not interested enough to read up just now.
My backup method is not automatic, or a moving backup plan, if I don't get a move-on and make full system clones. I do make copies of photos and documents the manual way, to USB external drives; and occasionally backup to DVD or CD media. And USB flash, that helps to move files between computers without need to use file sharing via wi-fi. {Like Why fly? Walking is better exercise unless one is a bird. Squawk!}
https://www.google.com/#q=raid+backup+mac
Depending on the ports in your Mac, you may be able to use other cables to attach between a backup or externally enclosed hard disk drive with multiple partition and bootable clone in one of them. Not sure about the Thunderbolt, and where that is the main port, adapters are required to access other devices, as allowed.
Anyway, I am going on and on, yet not really saying anything.
My ideas would not be all that interesting to follow as a backup
plan when matching available newer hardware to task, but you
can get some into better ideas if you are not in a rush. Get a
good setup and then look into more an betterer stuff.
Good luck & happy computing!

My mac can't find the volume" Data" on Time Capsule. Also Ican't find with the disk utility program the hard disk in the Time Capule; so I can't format the disk again. What can I do?

My Mac can't find the volume " Data" on Time Capsule, Also I can't find with the disk-utility program the hard disk in the Time Capusule.
So I can't format the disk in the Time Capsule
Deconnevt and then connecting the power tp the Time Capsule gives also no solution.
What can I do?
Joe

I listed the commands.. that is how you manually mount the disk.. follow exactly the commands I gave you.
In finder use top menu, go, connect to server.
Type in the following.
AFP://TCname or AFP://TCIpaddress (obviously you replace with the actual name or the actual IP address).
If that fails..
try
SMB://TCname
Here is the screenshot.
tardis4 being the name of my TC.
It should then ask you for your credentials.
And it should remember them in the keychain and be able to then get TM to connect.

HT1478 I can't find any "Enable Disk" option on the Summary tab of iTunes

I can't find any "Enable Disk" option on the Summary tab at all for my iPod, running the latest iOS on the latest iTunes 11. Any clues?
I am simply trying to take all the photos on the iPod and put them on a folder on my Snow Leopard workstation.

ahhh, Thank you Master Grasshopper!

Does disk utility damage the Hybrid MBR

I have a dual boot system for Mac X 10.8 and Windows 8 and there are 5 partitions on my internal HD (EFI, Mac OS X, HD Recovery, Mac HFS Data, NTFS Windows 8). I created a custom Hybrid MBR that allows dual boot to partitions 2 and 5 and protects the remaining partitions. The MBR shows 4 partitions (max allowed) so it does not precisely agree with the GPT. This all worked fine in conjuction with rEFIt for booting.
Recently after using Disk Utility to check and repair my internal HD the custom MBR was apparently compromised because I was unable to boot into Windows. My question is then, "Can Disk Utility damage the MBR that I carefullly customised?" I could rebuild the MBR using gdisk in terminal but I don't want to have to repeat this unnecessarily. If not Disk Utility, do other programs mess with this area of the disk? I also use Carbon Copy Cloner to make a periodic clone of my start-up partition.

diskutil list
Last login: Sun Dec 21 16:07:46 on console
Justins-MacBook-Pro:~ justinmontoya$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *750.2 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         749.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *748.9 GB   disk1
                                 Logical Volume on disk0s2
                                 4A646B29-3794-4A34-AC98-C0FB505D402B
                                 Unlocked Encrypted
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *500.1 GB   disk2
   1:                 DOS_FAT_32 500HDD WD               500.1 GB   disk2s1
Justins-MacBook-Pro:~ justinmontoya$

Disk Utility missing the Erase tab

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