Erased free space in Disk Utility, and after it finished it kept a DMG there.

I erased free space in Disk Utility, and after it finished it kept a DMG there called "DeveloperDiskImage.dmg", why is it left behind? can it be deleted? how? if erasing free space is supposed to help get memory and remove all the files truly, it shouldnt be creating anything, it created a DMG at the start, but it went away, after a hour and a half it made the DeveloperDiskImage, i went to eat dinner and when i came back it was done but that was left.

Delete it. Erasing the free space isn't supposed to free up any space; it's there in case someone deleted a file insecurely when they meant to securely delete it.
(65417)

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Clicked erase free space in disk utility, now I have no SPACE!

I ran erase free space in disk utility in hopes of freeing up more room on my hard drive, and had 34 GB free, but now it says zero kb available. I have never done this before. It still has twelve hours to go, and I was wondering if this was normal.
MacBook Mac OS X (10.4.7) White 2 Ghz.
MacBook Mac OS X (10.4.7) White 2 Ghz.

Doing so does not free up any hard drive space.
Copied from this link.
http://docs.info.apple.com/article.html?path=DiskUtility/10.5/en/duh1010.html
You might see a message saying that you are running out of disk space, but you can ignore that warning. When this operation is complete, you will have the same amount of free space as you did when it started.
For suggestions to free up hard drive space, check this link.
http://www.thexlab.com/faqs/freeingspace.html

Start up and shut down is slow after erasing free space using disk utility?

I went to Disk Utility, clicked Erase, and then "Erase Free Space." When I saw that it was going to take 1 hour and 30 minutes, I tried closing disk utility. It wouldn't let me exit, so instead I pressed "Skip." But when you hover over the "Skip" button it says, "Erase all data and reformat the disk."
I'm wondering if the fact that I pressed the skip button has anything to do with my computer shutting down/starting up A LOT slower now. If so, what can I do to fix it?
Thanks!

Just wanted to give an update. I called Apple and apparently, you shouldn't empty the free space using disk utility while you're logged in. I had to insert the Installations CD and press the "C" button while my computer restarted, and used Disk Utility from there. My start up and shut down speed still isn't exactly the way it was before, but this definitely made a difference.
Thank you to those who replied to my question!

Time Capsule full after a "Erase Free Space" using Disk Utility

Hello,
I am facing some issues related to my Time Capsule.
Reviewing my past, I had a lot of backups on this, using Time Machine and it always worked pretty well. But after deleting some backups manually to reclaim disk space, this was not exactly freeing it.
Searching in the forum here, I saw that I could mount the backup sparsebundle image and map it into the Disk Utility. This always worked greatly too both for disk checking and reclaiming the space back.
The problem starts on the last Friday when I performed the operation again, but it started using the whole free space that I had and did not give it back.
Studying the case I found that it creates a temporary folder to store the file it creates to write the byte 0 on the disk. This file actually resides in the sparsebundle image and therefore I can see the file with 200GB, for example, in the Finder, this is a split in bands (8MB) just like the backup is. After the disk gets full, the Disk Utility should delete the file properly and give me back the space safely.
Right now my Time Capsule has 0 byte free and I can't do anything on it beyond redo the the Erase Free Space operation. When I do it, it starts writing the temporary file again and the problem repeats itself.
I know that if I backup the data and really erase the disk, I'll get it back, but this is not an option for me because I want a smart solution for this.
The only thing that changed between when it worked and now is the 10.5.6 update that I made and I'd like that it's not the root of the issue.
Is there any suggestion or general stuff I could do to fix it?
Did anybody already face the same issue?
If anyone needs more details to help me out of this, just let me know.
Thanks and regards,
Eduardo

Just another thing to add, I'd like a good solution for this as the redo operation from Disk Utility takes around 2 days and then it just "dies".

System Won't Reboot Proper After Running "Erase Free Space" in Disk Utility

Thought I'd run it to see what happened.
On an 80gb HD with 35gb free, I was told I was running out of free space partway through the erase, program then quit. Kept system going for about two days without problems, then shut it down for a day. When I rebooted a few hours ago, it seemed to take forever to do so, followed by a dim perpetual blue screen which I couldn't brighten via the keyboard. Waited 20 minutes for screen to resolve into my desktop; alas, no such luck. Rebooted a few times, no change.
17 pB @ 1.33ghz & 1.5gb RAM Mac OS X (10.4.7)

One of the first things I tried: no effect.
Booted on the MacOS X CD and ran disk utility and it found errors, fixed them, rebooted from the hard drive and now I get a perpetual grey screen with the li'l rotater. Zapping doesn't do anything this time either.

"Erase Free Space" in disk utility, writes a large file?

While poking around in disk utility I came upon the 'Erase Free Space" function so I decided to try it out and see how it worked. I chose the medium security setting and let it run. After a while I stopped it because it was going quite slowly. Afterwards I noticed that about 25gb of previously free space was gone from my HD. Did it write a backup file?
I tried looking for a file but "find" in finder coldn't seem to locate any files written during that time period.
any direction to recoup the space is greatly appreciated.

OK, thanks guys.
Sometimes the simplest things...
Now if I were at the office working on something on a windoze machine a restart would be the first thing I would try, you have to restart twice a day even if the machine is working properly!
I however, rarely shut down my Mac. Unless there is a thunderstorm or I am going away, or I've performed an update, the machine stays on/sleeps.
Apparently as an "erase free space " is being performed the space is being used as zeroes are written. When I allowed it to complete the space returned. However; the space that was consumed during the aborted try was still not availible.
Only after a restart did the space become shown as being free.
This has been great since I now know of 2 more helper apps. Tinker Tool allows me to see hidden files and change other prefs not availible natively. OmniDiskSweep quickly check file on the HD.
Thanks for your help, and if there were votes still, I'd use them all!
-T

Erasing free space using disk utility

Disk utility does not always work when trying to erase free space... I have 50 gigs of free space that I can not retrieve... I do not want to have erase my entire SSD like I did a month ago to clean up deleted files...

In Dec I did a complete re-install of Lion, because I was running out of SSD storage...
The other day, the Mac Air was acting strange, so I checked the SSD drive and found there was only 25 free gigs left... 60 gigs had disappeared in 5 weeks...
Here is where the 60 gigs went...
1. Added 9 gigs for new pictures
2. IPOD/iPhone Photo Cache added 13 gigs (It was emptied during the Lion re-install)
3. Time Machine, kept making hourly back-ups on the SSD, added 38 gigs (Turn off Time Machine & 38 gigs returned as free space)
Thanks to those who suggested I use Omni Desk Sweeper, which shows you what your files sizes are by each file & to turn off the Time Machine...

I thought I was creating free space by erasing free space using disk utility but what I really did was literally ERASE MY FREE SPACE on my Macbook Pro 10.8.4 and all I want to know is what to do to recover my free space?

When I click on ABOUT THIS MAC and then on STORAGE it shows that I have like 700 gb of "OTHER" in yellow and all I want is for the yellow to disappear and have all my free space again! please someone help me
<Edited by Host>

Your free space hasn't gone anywhere. This is simply the initial result of the process. However, your free space should be there once you need to use it.
What is "Other" and What Can I Do About It?- Apple Support Communities

Can't partition free space using Disk Utility

So something went wrong when I tried to bootcamp.
Now the situation is following:
1) I can't install Windows using USB stick, it says that the free space is in GPT;
2) I can't partition the free space with Disk Utility, tryied it also with recovery mode, the apply button is clickable and active, but it does nothing, it just stays like so and when I exit from Disk Utility it asks if I want to quit without applying but it doesn't work.
So basically I have wasted 20GB of space and can't do anything with it.
I don't want to format the hole disk, are there any other workarounds without need to reinstall OSX?
I have MacBook Pro 13" Retina (late 2013), 128GB SSD, 8GB ram.

markov-mac:~ markov$ diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage                         100.3 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           *100.0 GB   disk1
markov-mac:~ markov$ diskutil cs list
CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 0F0D9268-58FC-4832-8FCB-4A11FB5675F6
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         100335546368 B (100.3 GB)
    Free Space:   15724544 B (15.7 MB)
    |
    +-< Physical Volume 9B8968BE-CE97-4A66-B5B3-31B4EB87E21F
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     100335546368 B (100.3 GB)
    |
    +-> Logical Volume Family B29C277A-660B-41C4-8F5C-A1C5FB01B60F
        Encryption Status:       Unlocked
        Encryption Type:         None
        Conversion Status:       NoConversion
        Conversion Direction:    -none-
        Has Encrypted Extents:   No
        Fully Secure:            No
        Passphrase Required:     No
        |
        +-> Logical Volume 6736784D-A946-4EBF-BBA2-BC7DDC6C4EDE
            Disk:                  disk1
            Status:                Online
            Size (Total):          99999997952 B (100.0 GB)
            Conversion Progress:   -none-
            Revertible:            No
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS
markov-mac:~ markov$ mount
/dev/disk1 on / (hfs, local, journaled)
devfs on /dev (devfs, local, nobrowse)
map -hosts on /net (autofs, nosuid, automounted, nobrowse)
map auto_home on /home (autofs, automounted, nobrowse)
map -fstab on /Network/Servers (autofs, automounted, nobrowse)

Greyed Out "Free Space" in Disk Utility

Hi
I have a problem with my main Logical Volume Group / Partition. So My main Logical Volume Group (Macintosh HD) was separated into 2 partitions. I decided to delete the second one, and once the process started in Disk Utility, it crashed. Now if I look at the Logical Volume Group, it is separated in two, first one being Macintosh HD, and the second one is greyed out and is "Free Space".
Now If I look at the info of my Logical Volume Groupe, it says "Capacity 853,07 GB / Available 115 KB" when in actuality I have a 1TB fusion Drive, If I look at the Macintosh HD PARTITION, it says "Capacity 844,56GB / Available 252.99GB" which evidently doesn't add up. The "Free Space" is supposedly 267,78GB...
I tried "filling" that free space with a new partition, but when I apply the changes to the partition layout, nothing happens, and it reverts back to being greyed out and empty. (I tried both in Disk Utility, and in Disk Utility while in Recovery Mode, and I've also Repaired the volume and the partition)
How can I either force-create a partition with that free space, so that I can use all of my actual HDD space, or completely erase that "Free Space" and have my Macintosh HD partition fill the whole Logical Volume Group. (I tried erasing the free space of the Macintosh HD volume, but it didn't change anything.
Hopefully, there is a way to do it without having to back up my whole Macintosh HD partition, and reformatting my whole computer...
Thanks

If you wish to delete data, the best option would be to encrypt everything on the drive (locking everything with a password) and then erasing the drive. This would atleast scramble the left over data. The problem is that SSDs have a wear controlling firmware that distribute the load accordingly, so the entire drive wears evenly. Secure erase wouldnt work since secure erase works by first erasing the refrences to the data, and then writing 0s over the left over data. Since the firmware distributes the load differently each time, there is no guarantee that the data would be covered in 0s.

Erase Free Space then Disk Full

help. I ran erase free space in DU, worked fine but then created some temp file/s which then filled my HD up. Where are these file/s so I can delete it. Before I had over 400G free, now nothing.
Is this normal when you run secure delete..?
Slee

Hi Glynn... So I gather. However, I didn't know at the time and may have screwed up. It ran fine for an hour, then said writing temporary files. After a few min's I got the error message start-up disk full, which it was. Not knowing what was happening, I hit skip. It them seem to hang, so I forced a quit.
Before I has 450G+ free on my disk, now less than a 100 meg. Oh dear. It seems by forcing a quit of DU these temp files have still to be deleted. Where are they..?
Help
Steve

Erase free space in Disk Utilities grayed out for SSD

Is it normal that this function (erase free space) does not work for a SSD? It is grayed out on my iMac for SSD not for the 1 TB HDD.
Now that I installed Lion and Trim is working (on original Apple SSD) in my iMac I would like to erase free space. I read somewhere that you should do this if you did not have the Trim option before and you do have it now. Or is this BS?
peterwillem

Take a look at this link, https://discussions.apple.com/thread/3210131?start=0&tstart=0

External Hard drive shows no space after failed "Delete Free Space" from Disk Utility

2009 13" MBP running 10.6.8
I was clearing out a section of my external to clean it of a former client's information. The operation worked fine until it got to the "create temporary files" where it got hung for several hours. Forced quit D.U. and rebooted my machine. Now the external only shows 5MB when it should be closer to 150MB.
I have run the the following script in Terminal to show hidden files:
defaults write com.apple.finder AppleShowAllFiles TRUE
killall Finder
Not sure what files to delete.
Should I run:
sudo rm -f /var/root/Library/Caches/TemporaryItems/*
Will this delete the temporary items in my external or only my HD?
Any tips would be greatly appreciated!

Fixed it! I downloaded WhatSize and found the temporary files. Deleted and retrieved all my space!

No free space on disk slice - and throwing I/O error

Hi,
In one of my LDOMs, one slice is full. - unfortuantely that has the Oracle binaries
+/dev/dsk/c0d2s3 9.8G 9.8G 0K 100% /ora00+
But if do an ls on the slice , it is throwing I/O Error
ldg2#cd /ora00
ldg2#ls
+.: I/O error+
ldg2#
On the same disk , all other different slices are working fine.
How wil i recover from this ?

What is the filesystem on c0d2s3? ufs?
What is the backend of the vdisk? Is it a physical disk, a file?
Can you provide the output of the command "prtvtoc /dev/rdsk/c0d2s2"
You can try to unmount the partition, then re-mount it. Also try to mount the partition read-only.

Disk Utility - Erase Free Space - Creating Temporary File Freezes

BDAqua: I tried responding to your reply to my original posting but I get an error message that I was not authorized to reply. I logged out. I can't find the original posting in my Activity so I approached from the link in my e-mail saying you had replied. Now it says the area is restricted. What's up with that?
Rod
Here's the original post:
I used "Erase Free Space" with Disk Utility after trashing several files I no longer wanted on the hard drive or recovered. I used "Zero Out Deleted Files" option. It took over 12 hours before an error message appeared "Your start up disk is almost full. You need to make more space available on your start up disk by deleting files." I thought that was what I was doing. Disk Utility continued but got stuck on "Creating Temporary File." I force quit Disk Utility after several more hours. I had to manually shut down the computer because the restart command wouldn't work. It rebooted and appears to be OK. Evidently, this temporary file consumes significant amounts of disk space. This is an older iMac with 10.4.11 (18 GHz PowerPC G5) - I know, pretty old but I still have OS 9 on it and several files I need to extract before I trash it.
1. Should I do nothing? The iMac seems to be working fine.
2. How do I know if this Temporary File exists and consuming space? Spotlight doesn't find it. Where is it?
3. Is my start up disk in fact almost full? How would I know that?

Here's what I tried to say in my response that I wasn't authorize to make:
I can't seem to reply to your response BD . . . says I'm not authorize . . . so I'll try to reply to my original post.
Thanks BD for your reply. Here's the info on the drive: 1.3 TB capacity with 1,017 GB available. Eventually I will recycle the computer at Best Buy who guarantees the hard drive will be erased. I just want to get all my files off first. I'll just do another Erase Free Space and see, as you suggest, if there are any files to be zeroed out. Maybe there aren't any. I've extracted most of what I want but am debating how to move the entire iPhoto library to an external drive so I can access it from my Mavericks machine. Can I just drag and drop the iPhoto Library, or do I need to export it somehow?

Erased free space in Disk Utility, and after it finished it kept a DMG there.

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