Hardware :: Will Disk Utility Partitioning Erase Hard Drive?
Dec 19, 2010
I have a hard drive with about 250 gb of film and music on fbut it's formatted as HFS+ which windows cant read! I need to partition the drive to make windows be able to read at least a portion of it. But If I run disk utility and create a partition will it erase the info I already have on there? I don't have this data else where so I hope it wont!
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Oct 17, 2010
I have an external hard drive that was used on a PC. I want to use it on a Mac. I went into disk utility and did an erase. (Extended Journaled and in security options changed it to zero out data). I can now use it on the Mac how ever it is telling me that there is 54.1 MB of used space. I want to have access to this. How do I do it?
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Dec 17, 2010
I try to securely erase big hard drive and Disk Utility in Tiger says Secure Erase. Pass 1 of 7. Estimated time 123 hours
Is this progress bar only for erase 1/7 or for all 7 passes (1-7/7)?
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Aug 15, 2009
1. To grab all the files I need/don't want to lose (photos, music, documents, etc.)2. Then completely erase the 500GB HD so I can then install it into the new Macbook Pro and install Leopard.(I'll then externally connect the 160GB HD that came w/ my Macbook Pro and add the files I've already copied into that 160GB HD into the 500GB Leopard installed HD in the new Macbook Pro)So, currently my 500GB HD is connected to my Macbook pro and I want to completely erase everything so I'll then have a completely clean hard drive, to then install into the Macbook Pro, add the installation discs and install Leopard into the 500GB HD.
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Nov 7, 2009
i just erased my external hard drive through disk utility my accident. I had VERY important files and the 1tb was full.
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Jun 12, 2009
I have used bootcamp to partition my disk and install windows vista onto my uMB. Now I want to partition the disk again to create a tri boot setup where I can either install ubuntu or the dev preview of snow leopard (I haven't decided yet). Can I just do this with disk utility and shrink my OS X partition in order to create a new partition or will this cause problems with the disk? I would really like to not do a fresh install of OS X because I have had to do this twice to fix disk problems relating to bootcamp.
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May 11, 2008
I currently have Leopard installed on my MBP. A while back I installed Windows XP Pro SP2 via bootcamp. I have a 130GB Leopard partition, and a 18GB Windows partition. Now I want to add another partition, splitting the Leopard partition into two. I want to add a 20GB partition. I have cleaned my computer, and there is plenty of free space to do this. Currently 70GB free. So I go into disk utility, and try to partition. Doesnt work. Says that it failed to verify, repair disk. Then i boot from Tiger install disk, open disk utility, and verify disk. Says there are errors so i repair disk. Says that it repair worked. Verified again just to be sure, no problems. Go back into leopard and disk utility to try and partition, still does not work, I get the same error.
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Jun 25, 2009
Here's my setup:
One, dual bay enclosure (1.5TB x2):
OWC Mercury Elite - AL Pro Dual Bay Enclosure
https://eshop.macsales.com/item/Othe...ng/MEFW934AL2/
and one, two pack of 1.5TB Seagate HD
http://accessories.us.dell.com/sna/p...550055-683153-
Total: paid $310 including shipping for the 3.0TB external setup.
I'm going to use FW400(since my MB pro has no 800 port) and partition this into two 1.5TB partitions. one for storage, and one for time machine backup. My question is if I choose 2 partitions in disk utility, will it automatically know to use one of the 1.5TB Seagate HD for one partition and the other 1.5TB seagate for the 2nd partition? Or will it use half of one and half the other? I would like one partition to be one seagate 1.5TB HD, and the 2nd partition to be the other, that way if one fails I have a backup (using Time Machine with one partition to backup the other 1.5TB drive).
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Mar 14, 2009
I use a G4 400MHz and need a defragmenting / partitioning utility, what are my options? Drive Genius requires more horsepower.
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Apr 8, 2012
I'm trying to restore the partitioning of my late 2011 Air drive, after messing it up while trying to dual boot OS X and Linux. The goal is to get rid of the superfluous partitions and resize the OS X one so I can use the whole drive again. Data loss is not an issue. According to Disk Utility the partitioning looks like this:
EFI
Macintosh HD
Recovery HD
06
[code]....
Info:
MacBook Air, Mac OS X (10.7.3)
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Jun 5, 2014
I was in the recovery hd, and i was partitioning my main drive into to partitions. while it was pertitioning, i accidently quit the disk utility. i saw that now the hd was in one partition and was nearly full (it was half filled before). i did a disk repair and it came back to half filled. now that i retry to partition it it gives me error
" Partition failed with the error: Couldn’t modify partition map because file system verification failed."
Is there anything I can do except from reinstalling everything?
Info:
MacBook Pro, OS X Mavericks (10.9.1)
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Apr 24, 2012
I have a 2TB Western Digital My Book Studio FW800 external that has 5 partitions, connected to my 2011 iMac. I had help doing the partitions and don't really remember the reasoning, but one is just for my SuperDuper! backup, one is Miscellaneous, one for movie clips off my camcorder, one for misc scanned photo's and one for my genealogy research. I back up using Time Machine to a Time Capsule and also to this WD hard drive with SuperDuper!
Recently I'm getting a pop up message that "Mac OS X can't repair the disk "Genealogy"'. And it needs to be reformatted. It's become a read only disk. When I look in Disk Utility it shows all the partitions as "Mac OS Extended (Journaled)" EXCEPT for the one in question. I also noticed that there are a lot of files with "date created" being the same date in 1969! These files may be letters I've written or photo's I added to that partition within the last few years.
I think I have to completely reformat the entire external hard drive to repair this, but I want to make sure. Because it's going to be a major hassle backing it all up to another external (having to get one first) and then figuring out how to make the files that have turned "read only" in that one partition, back to their original state! Does this sound right, that I have to reformat the entire external hard drive? And how do I get the read-only files back to their original state.
Info:
iMac, Mac OS X (10.7.3)
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Jun 27, 2014
I have a Seagate 1 TB Backup Plus Drive which was working perfectly fine until I plugged it into a USB hub. It detected it while in the hub and I was able to get files off of it, but when I ejected it from the hub and put it back into the USB slot on the computer it was not detected by finder. It shows up in the disk utility and I clicked verify and repair and it says:
Verify and Repair volume “Seagate Backup Plus Drive”
Checking file system
Volume repair complete.
Updating boot support partitions for the volume as required.
Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Is there any way to get this to work properly again? Or if not is there a way for me to recover my files on the external hard drive?
I have a Macbook PRO late 2011 running OS X Mavericks.
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Dec 2, 2014
Cant erase hard drive because cant "unmounted disk"...My hard drive crashed about a month ago, and i used a program called data rescue to clone hard drive. when i put it in mac it will not load. now all i want to do is erase the drive and install Yosemite as new mac. but cant install or erase the hard drive.
Info:
MacBook, Mac OS X (10.7.5)
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Feb 22, 2010
I ran installer then went to disk utility and pushed disk repair. it ran and indicated in green that no repairs were necessary. i then went to startup disk and only the Diks and network startup showed up but no hard drive. i also open computer to make sure was not wet muddy due to leak in cooling system but all was dry
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Sep 7, 2009
Anyone knows why my external HD (USB disk connected to Airport extreme) does not show up in disk utility? (It sits on my desktop just fine and is fully functional) I' want to erase a partition but now i don't know how.
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Jan 28, 2008
I am having trouble erasing DVD+RW discs. When I insert a used disc and try to erase it in Disk Utility, the process seems to complete almost immediately, ending with OS X asking me if I want to mount the inserted blank disc in Finder. However, if I eject the disc and put it back in, everything is still on there. (detail: When erasing, there is usually a short interval where a striped progress bar is shown, after which a "normal" progress bar is slowly filled as the disc is erased. However, for me only the striped progress bar is shown--the "normal" progress bar is skipped--and then OS X says erasing is done.) If instead of ejecting the disc I choose to go ahead and burn something as if Disk Utility has actually erased the disc, I get a laser power calibration error.
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Aug 5, 2009
I ordered a second hard drive for my powermac g5.Its a 400 gig seagate drive.I power off my machine,unhooked everything and plugged in the drive.
I boot up and the drive isnt showing in disk utility.Is it something i did?
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Dec 11, 2009
I've got an 8GB Sony Micro Vault Pen Drive that's stopped working. When I opened up Disk Utility it appears but doesn't give me the option to erase.
Can I try doing it with anything else before I bin it and buy a new one.
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Jan 4, 2010
I am going away traveling and need to back up all my stuff off of my mac for the first time.. (pics, music etc the usual). I brought a WD Elements 500GB External Hard Drive and when I plug it into my mac book (OSx) it appears in finder, and the desktop but I can't drag and drop nothing into it. Apparently I have to format it! So have researched about formatting it, but I don't have "Disk Utility" in my utilities? My Mac was given to me from a friend second hand so i don't have the disks etc to get it. Any other way of formatting my Hard drive or a link to download disk utilities or any alternatives!
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Jan 19, 2010
the past couple of days my new macbook Pro (only had it a couple of months) has been really slow to boot, with a grey progress bar that I have never seen before. I googled it, and you all know what i found.
So I ran the disk utility, and selected analyze or whatever the button is, and it said I should load it from the INstall DVD, as the disk needs repairing.
Guess what. The disk cannot be repaired.
An error message about expecting 31 files but only finding 30?
It recommends erasing the disk and reinstalling from scratch.
Now, as far as I can see, apart form the slow boot times, everything else still works. Does this mean that it is just a ticking time-bomb that will break any time, or is just a couple of corrupt files that don't matter?
This is really annoying, I love my Mac, but having to reinstall so soon after purchase?
Apologies if there any other posts on here already, it is late, I am stressed, and would like a nice person to help me out.
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Aug 11, 2009
I have been reading that the erase feature on OS X's disk utility will not remove file slack. If I erase the entire drive using one of the security options (Zero-Out, 7-Pass, or 35-pass),
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Oct 9, 2009
I recently installed and uninstalled a few versions of linux on my imac. After installing some versions i realized I was going to need more space, so I went back into mac OSX and have been trying to add a new disk partitions with more GB.
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Nov 12, 2009
I was making a partition on my USB external drive in order to put a disk image of Snow Leopard on it, so I could boot off of it.
I added a 10GB partition to the drive, and clicked Apply. The following dialogue box came up:
Partitioning this disk will change some of the volumes. No volumes will be erased.
This volume will be added:
"Snow Leopard"
This volume will be resized:
"XXX HDD"
I clicked Partition, and it finished very quickly. I checked Finder, and the entire drive, BOTH partitions are completely empty.
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Apr 13, 2010
My macbook hard drive crashed, luckily I had just backed up everything. I went and bought a new 320 GB hard drive, I researched and I know it's compatible with my Macbook. I decided to install windows 7 on it first, but the windows 7 installer wouldn't recognize my hard drive. (For the record, my Matsushita superdrive will not read DVDs anymore, only CDs, so I created bootable copies of both my Mac OS X install disk and my Windows 7 install disk, and I've been using a bootable rEFIt CD to boot from my USB flash drive.)
So I booted up the Mac OS X Snow Leopard disk and started disk utility - it recognizes the rEFIt CD, it recognizes the flash drive, but no internal hard drive. The partitioning tool in rEFIt doesn't recognize it either, but I know it's seated correctly because I can hear/feel it booting up with the computer (if i remove the battery and boot with the computer plugged in). I also know it works correctly because I installed it in my girlfriends PC and it recognized it just fine, I even installed Windows 7 on it, hoping the macbook would boot from it.
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Apr 18, 2010
Can I make a disk image of my current MB Pro (early 2008) and copy it to my new i7 MB Pro to retain all my docs and programs?
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Jul 23, 2010
I'm selling a hard drive that doesn't work when formatted for Mac so I need to sell it PC format. Will MS-DOS (FAT) work, and does it need to be set to Master Boot Record?
I have a PC I can test it on but I just want to now what to do before I try it out so I don't keep having to switch between computers.
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Aug 2, 2010
Just installed a new HDD into a macbook pro that was dropped. Seems fine, loads the disk and then says it can install the OS, i load up disk utility and theres no hard drive int he list just the optical drive and the DVD, its not the disk that came with the mac itself its either my proper retail one or the one that came with my personal older macbook which might be the issue. Ive taken apart and reconnected the HDD and all seems fine internally. Are there any issues that cause this except not using a full retail disk which im going to try later on, just wanted to rule everything else out.
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Aug 18, 2010
I have a dual 1.25 ghz MDD Powermac G4. It was working fine until a couple of days ago. It froze up, I restarted it. I got a blank blue screen.
Also, the computer made some awful clicky noises that I've never heard before.
I booted from the OS X installation CD. Disk utility lists the WD1800 hard drive, but I can't do a re-install and there's no option to repair it.
I can't erase or partition it because when I try, I get a failure message saying it can't be done ("chosen size not valid for chosen filesystem"). The HD is listed in system profiler... with a capacity of 0 bytes.
I assumed that the hard drive had died, so I went to a local PC shop and bought the only IDE drive they had (a Maxtor 6l250r0). I installed it, then booted from the OS X CD.
I know that new hard drives need to be formatted, but I assumed that this could be done with disk utility.
But disk utility can't find the new hard drive, doesn't list in the left column. It shows the optical drives and the install CD and the old WD hard drive which can't be erased or repaired, but no new hard drive.
It's not listed in the system profiler, either.
I checked the cable connections and tried installing it in the front carrier rather than the rear, but nothing works - disk utility and system profiler can't recognize it.
The only other desktop mac I have access to right now is my old 450 mhz Sawtooth G4. I tried putting the HD into the sawtooth and got the same results - disk utility and system profiler can't find the new HD at all, but has no trouble finding the old 20gb HD and the DVD and zip drives.
I'm... not really sure what to do here. Am I doing something wrong?
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May 7, 2012
I had to power off my iMac by Pressing the power key and holding it several times over the last few weeks. The last time it wouldn't reboot - I'd just get an apple icon. When I tried a safe boot I'd get the icon and it would change to a no entry sign.Next I started up from the snow leopard installation disk with the intent of repairing the iMac disk. The installation disk worked but when I opened disk utility it only found the installation disk. It didn't find the iMac disk.
Info:iMac, Mac OS X (10.6.5)
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