Free space & filesystem type
I am new to unix , i want to know - how to check filesystem SAN / NFS & total free space in system.
Well, a beginners' course in Unix is far beyond the scope of this forum.
Please get the friendly manual, and feel free to make use of Google and the like.
A hint: Start with df command. Output will differ for various flavours of Unix.
For more info type:
man df
hope this helps
Similar Messages
-
Calculate Free Space On Filesystem Level
Hi,
I need to add datafile on an file system for example /D00/oracle/data/ file system, Before adding datafiles to that particular file system I need to check the free space on OS level and also I need to check the estimated auto extensible growth on the file system. So that I can new datafiles depending on the remaining space available to that file system. Is there any sql script available to calculate the estimated auto extend growth on one particular filesystem and give us the remaining space on the OS level….
Regards,Can you define the term "estimated auto extend growth"? That could mean the maximum size the data file could extend to. It could mean some sort of projection based on prior extend operations that were captured in some sort of log table.
What version of Oracle?
What operating system?
Realistically, no SQL script can see the free space available on the file system. You could write a Java stored procedure that called your operating system's free space function (i.e. df in Linux), made the results of that call available to Oracle, and then query that.
Justin -
Logical Volume Group and Logical Partition not matching up in free space
I was dual booting Windows 7 and Mountain Lion. Through Disk Utility, I removed the Windows 7 Partition and expanded the HFS+ partition to encompass the entire hard drive. However, the Logical Volume Group does not think that I have that extra free space. The main problem is that I cannot resize my partition. I am wanting to dual boot Ubuntu with this. Any ideas? Any help is appreciated. I will post some screenshots with the details. Furthermore, here are some terminal commands I ran: /dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *250.1 GB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 249.2 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS MAC OS X *248.9 GB disk1 Filesystem 1024-blocks Used Available Capacity iused ifree %iused Mounted on
/dev/disk1 243031288 153028624 89746664 64% 38321154 22436666 63% /
devfs 189 189 0 100% 655 0 100% /dev
map -hosts 0 0 0 100% 0 0 100% /net
map auto_home 0 0 0 100% 0 0 100% /home CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group 52A4D825-B134-4C33-AC8B-39A02BA30522
=========================================================
Name: MAC OS X
Size: 249199587328 B (249.2 GB)
Free Space: 16777216 B (16.8 MB)
|
+-< Physical Volume 6D7A0A36-1D86-4A30-8EB5-755D375369D9
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 249199587328 B (249.2 GB)
|
+-> Logical Volume Family FDC4568F-4E25-46AB-885A-CBA6287309B6
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: Converting
Conversion Direction: backward
Has Encrypted Extents: Yes
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume BB2662B7-58F3-401C-B889-F264D79E68B4
Disk: disk1
Status: Online
Size (Total): 248864038912 B (248.9 GB)
Size (Converted): 130367356928 B (130.4 GB)
Revertible: Yes (unlock and decryption required)
LV Name: MAC OS X
Volume Name: MAC OS X
Content Hint: Apple_HFSHere is another try via the command line:
dhcp-10-201-238-248:~ KyleWLawrence$ diskutil coreStorage resizeVolume BB2662B7-58F3-401C-B889-F264D79E68B4 210g
Started CoreStorage operation
Checking file system
Performing live verification
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Incorrect block count for file 2012.12.11.asl
(It should be 390 instead of 195)
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Checking volume bitmap
Checking volume information
Invalid volume free block count
(It should be 21713521 instead of 21713716)
The volume MAC OS X was found corrupt and needs to be repaired
Error: -69845: File system verify or repair failed -
HT6114 how to free space on mac
Please help
Empty the Trash if you haven't already done so. If you use iPhoto, empty its internal Trash first:
iPhoto ▹ Empty Trash
Do the same in other applications, such as Aperture, that have an internal Trash feature. Then reboot. That will temporarily free up some space.
According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation. You also need enough space left over to allow for growth of the data. There is little or no performance advantage to having more available space than the minimum Apple recommends. Available storage space that you'll never use is wasted space.
When Time Machine backs up a portable Mac, some of the free space will be used to make local snapshots, which are backup copies of recently deleted files. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. In the Storage display of System Information, local snapshots are shown as Backups. The snapshots are automatically deleted when they expire or when free space falls below a certain level. You ordinarily don't need to, and should not, delete local snapshots yourself. If you followed bad advice to disable local snapshots by running a shell command, you may have ended up with a lot of data in the Other category. Reboot and it should go away.
See this support article for some simple ways to free up storage space.
You can more effectively use a tool such as OmniDiskSweeper (ODS) or GrandPerspective (GP) to explore the volume and find out what's taking up the space. You can also delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. That means you have multiple backups, not just one. Note that ODS only works with OS X 10.8 or later. If you're running an older OS version, use GP.
Deleting files inside an iPhoto or Aperture library will corrupt the library. Any changes to a photo library must be made from within the application that created it. The same goes for Mail files.
Proceed further only if the problem isn't solved by the above steps.
ODS or GP can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To see everything, you have to run it as root.
Back up all data now.
If you have more than one user account, make sure you're logged in as an administrator. The administrator account is the one that was created automatically when you first set up the computer.
Install the app you downloaded in the Applications folder as usual. Quit it if it's running.
Triple-click anywhere in the corresponding line of text below on this page to select it, then copy the selected text to the Clipboard by pressing the key combination command-C:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
sudo /Applications/GrandPerspective.app/Contents/MacOS/GrandPerspective
Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V). You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning to be careful. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
The application window will open, eventually showing all files in all folders, sorted by size. It may take a few minutes for the app to finish scanning.
I don't recommend that you make a habit of doing this. Don't delete anything as root. If something needs to be deleted, make sure you know what it is and how it got there, and then delete it by other, safer, means. When in doubt, leave it alone or ask for guidance.
When you're done with the app, quit it and also quit Terminal. -
my start up disc is full i have a macbook air, i back everuthing up with time capsule and have movies all my music libraries and photos onto that too so as i have free space, but my max still says my startup disc is full with "other"
First, empty the Trash if you haven't already done so. Then reboot. That will temporarily free up some space.
According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation. You also need enough space left over to allow for growth of your data. There is little or no performance advantage to having more available space than the minimum Apple recommends. Available storage space that you'll never use is wasted space.
If you're using Time Machine to back up a portable Mac, some of the available space will be used to make local snapshots, which are backup copies of files you've recently deleted. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. In the Storage display of System Information, local snapshots are shown as "Backups." The snapshots are automatically deleted when they expire or when free space falls below a certain level. You ordinarily don't need to, and should not, delete local snapshots yourself.
To locate large files, you can use Spotlight as described here. That method may not find large folders that contain a lot of small files.
You can also use a tool such as OmniDiskSweeper (ODS) to explore your volume and find out what's taking up the space. You can delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. That means you have multiple backups, not just one.
Proceed further only if the problem hasn't been solved.
ODS can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To see everything, you have to run it as root.
Back up all data now.
Install ODS in the Applications folder as usual.
Triple-click the line of text below to select it, then copy the selected text to the Clipboard (command-C):sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V). You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
I don't recommend that you make a habit of doing this. Don't delete anything while running ODS as root. If something needs to be deleted, make sure you know what it is and how it got there, and then delete it by other, safer, means.
When you're done with ODS, quit it and also quit Terminal. -
Why am I losing free space on my mac?
I'm currently down to 143.4MB of available space, my capacity is 499.76GB. I freed up some space by getting rid of some picture and files I don't need so i then had 4.32GB but then an apple tech told me to unload everything in my caches which I did but instead of recoverning more free space now I have less. Somebody please help me if you can.
Mac OS X
Version 10.6.8
Processor 3.06GHz intelCorei3
Memory 4GB 1333 MHz DDR3First, empty the Trash if you haven't already done so. Then reboot. That will temporarily free up some space. According to Apple documentation, you need at least 9 GB free on the startup volume for normal operation. You also need enough space left over to allow for growth of your data. Use a tool such as OmniDiskSweeper to explore your volume and find out what's taking up the space. Proceed further only if the problem hasn't been solved. ODS can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To really see everything, you have to run it as root. Back up all data now. Launch the Terminal application in either of the following ways: ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.) ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens. After installing ODS in the Applications folder, drag or copy — do not type — the following line into the Terminal window, then press return:sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up.
I don't recommend that you make a habit of this. Don't delete anything while running ODS as root. When you're done with it, quit it and also quit Terminal. -
I'm getting scratch disk full messages because my start up disk HD is wildly fluctuating the amount of free space it is reporting.
It is going from 168GB free (+50%) to zero KB and anywhere in between every few seconds. Even now while I am typing with only Mail and Safari running. I have 10GB of RAM so the scratch disk shouldn't really need to use the HD.
I've tried Disk Utility from Install Disk which reports nothing wrong, AHT - no problems, Onyx maintenance and cleaning.
Console is repoting:
Nov 29 12:42:33 CK-MacPro KernelEventAgent[35]: tid 00000000 received VQ_LOWDISK event (4)
Nov 29 12:42:33 CK-MacPro KernelEventAgent[35]: tid 00000000 type 'hfs', mounted on '/', from '/dev/disk0s2', low disk
Nov 29 12:42:33 CK-MacPro KernelEventAgent[35]: tid 00000000 found 1 filesystem(s) with problem(s)
which I presume is when the HD space is going down to zero.
Also - (not sure if this is related):
Nov 29 12:31:20 CK-MacPro mDNSResponder[16]: CK-MacPro._afpovertcp._tcp.xxx\.xxx.members.mac.com.: bad signature
Nov 29 12:31:20 CK-MacPro mDNSResponder[16]: Error -65560 for registration of service CK-MacPro._afpovertcp._tcp.xxx\.xxx.members.mac.com.
Nov 29 12:31:22 CK-MacPro mDNSResponder[16]: _autotunnel._udp.CK-MacPro.xxx\.xxx.members.mac.com.: bad signature
Nov 29 12:31:22 CK-MacPro mDNSResponder[16]: hndlRecordUpdateReply: Registration of record _autotunnel._udp.CK-MacPro.xxx\.xxx.members.mac.com. type 33 failed with error -65560
Nov 29 12:31:22 CK-MacPro mDNSResponder[16]: CK-MacPro._device-info._tcp.xxx\.xxx.members.mac.com.: bad signature
Nov 29 12:31:22 CK-MacPro mDNSResponder[16]: hndlRecordUpdateReply: Registration of record CK-MacPro._device-info._tcp.xxx\.xxx.members.mac.com. type 16 failed with error -65560
Nov 29 12:31:24 CK-MacPro mDNSResponder[16]: _kerberos.CK-MacPro.xxx\.xxx.members.mac.com.: bad signature
Nov 29 12:31:24 CK-MacPro mDNSResponder[16]: hndlRecordUpdateReply: Registration of record _kerberos.CK-MacPro.xxx\.xxx.members.mac.com. type 16 failed with error -65560
Any suggestions?Can I completely trash Mail and all its prefs and reinstall it?
That may not be as straight-forward as it first it appears.
First if you did that you would have to reestablish all your settings (accounts, rules).
Second some of the mail-related stuff is kept in non-obvious and not readable data bases and I don't know the implications of just deleting the "obvious" stuff like ~/Library/Mail and com.apple.mail.plist. I'm thinking here of references to ~/Library/Application Support/SyncServices info.
Here's one thing that a "little" safer that you might try but even with this make sure you have backups. In ~/Library/Mail you will (I think, based on what I see) see a folder with the name POP-f(account), where f(account) is some naming convention which is a function of your account. Inside there you will see the various mailboxes folders -- names ending with .mbox. Delete the appropriate mbox folder.
Deleting the mbox I think deletes the actual data. So hopefully you can launch Mail and not get hung up on the large amount of data represented by those message. However, those data bases I mentioned earlier will still think the data is there and show the messages in Mail's display. So you still need to try to delete those messages in Mail to get the data base back in sync with the fact that those messages are not there. No guarantees this is going to work and have that backup in case it fails. -
Inconsistent disk space indications: how to free space?
Checking size of Directory /Users on my Mac, I got 604 GB
Checking size of each sub-directory in /Users and summing up, I got 536 GB
Any idea of how I can get back the lacking 68 GB free space??
Thanks for your help!!
OS 10.8.4
MacBook ProEmpty the Trash if you haven't already done so. If you use iPhoto, empty its internal Trash first:
iPhoto ▹ Empty Trash
To locate large files, you can use Spotlight. That method may not find large folders that contain a lot of small files.
You can more effectively use a tool such as OmniDiskSweeper (ODS) to explore your volume and find out what's taking up the space. You can also delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. That means you have multiple backups, not just one.
Deleting files inside an iPhoto or Aperture library will corrupt the library. Any changes to a photo library must be made from within the application that created it. The same goes for Mail files.
Proceed further only if the problem isn't solved by the above steps.
ODS can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To see everything, you have to run it as root.
Back up all data now.
Install ODS in the Applications folder as usual. Quit it if it's running.
Triple-click the line of text below on this page to select it, then copy the selected text to the Clipboard (command-C):sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V). You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
The application window will open, eventually showing all files in all folders. It may take some minutes for ODS to list all the files.
I don't recommend that you make a habit of doing this. Don't delete anything while running ODS as root. If something needs to be deleted, make sure you know what it is and how it got there, and then delete it by other, safer, means. When in doubt, leave it alone or ask for guidance.
When you're done with ODS, quit it and also quit Terminal. -
I made a dumb decision to 'Erase Free Space' on my drive. I now have no free space, I realize because it wrote 0's over all my free space. Is there a way to undo this??? Help please I can't save any documents now! Thanks in advance all, it is truly appreciated. how can find the hidden temporary files using the terminal what do i type in?
It's more likely a failed Erase Free Space, which creates a huge temporary file; that's why it looks like you have no more available drive space. You can recover from this. See these links
https://discussions.apple.com/message/10938738#10938738
http://www.macgeekery.com/tips/quickie/recovering_from_a_failed_secure_erase_fre e_space
Post back if you need any help with this. -
How to find out the used space and free space in the DB for attachments
Hi,
In CRM 5.2 web UI, we can save a transaction by saving attachments like work documents or text files.
Could someone help me find out the used space, free space, maximum capacity on the CRM DB for these attachments.
Thanks & Best Regards,
Ramesh.Hi,
check with below table
TNAPR --- Processing programs for output
and NACE Transaction code
NACE -- out types
Regards,
Madhu -
Free space problem in / with oracle-xe-11.2.0-1.0.x86_64
Hi,
I'm trying to install Oracle-xe-11g on Red Hat 5.6, but I have the following problem:
[root@localhost] rpm -ivhf oracle-xe-11.2.0-1.0.x86_64.rpm
Preparing... ########################################### [100%]
installing package oracle-xe-11.2.0-1.0.x86_64 needs 180MB on the / filesystem
However I have enough free space in /, df command shows:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 3960348 3326380 429544 89% /
/dev/sda3 30368632 4066116 24734976 15% /home
/dev/sda1 46633 11310 32915 26% /boot
tmpfs 2198372 0 2198372 0% /dev/shmHow do I fix it?
Thank you in advantage
Edited by: 905637 on 03-ene-2012 4:43How do I fix it?Add Space.
Looks like you've got a less than 4G total for / with about 420MB free. That's nowhere near enough space, out-of-the-box the datafiles alone take about 1G.
Try bumping sda2 up another 4G, or add a (at least) 4G partition and mount it at /usr/lib/oracle
Per the Linux install guide ... "Disk Space ... 1.5GB minimum" http://docs.oracle.com/cd/E17781_01/install.112/e18802/toc.htm#BABHICJH
Edited by: clcarter on Jan 3, 2012 11:40 AM
add install doc URL -
Hello,
I have an Oracle 11gR2 RAC on two Oracle Linux 5 nodes. For storage I use a couple of OCFS2 partitions.
I have deleted a database using dbca and also have deleted the remaining files from shared partitions. When I consulted the free space with df I was surprised to see that the partitions appear to have a lot of used space even that there are no files on them. I've seen a similar behavior on a gpfs partition on AIX. Even that the database was closed and deleted (and lsof doesn't return anything), and I don't see how some files could be still opened, I rebooted both nodes (complete shutdown and start after both were down).
Now I see this:
[root@node1 bin]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdf1 4.0G 283M 3.7G 8% /d01
/dev/sde1 2.0G 283M 1.7G 15% /d02
/dev/sdj1 1.0G 91M 934M 9% /d03
[root@node1 bin]# cd /d01
[root@node1 d01]# ls -a
[root@node1 d01]#
How is it possible to have used space on those partitions even if they are empty?
How can I do some space management on OCFS2 partitions?
[root@node1 d01]# modinfo ocfs2
filename: /lib/modules/2.6.32-300.27.1.el5uek/kernel/fs/ocfs2/ocfs2.ko
license: GPL
author: Oracle
version: 1.6.3
description: OCFS2 1.6.3
srcversion: B8AF3035CE0F00B763D188F
depends: ocfs2_stackglue,ocfs2_nodemanager
vermagic: 2.6.32-300.27.1.el5uek SMP mod_unload modversions
Thanks.fsck.ocfs2 -f /dev/iscsi/openfiler:disk01/part1
mount /dev/iscsi/openfiler:disk01/part1 /d01
Filesystem Size Used Avail Use% Mounted on
/dev/sdf1 4.0G *283M* 3.7G 8% /d01
It's the same.
Just to add, the partitions were formatted like this:
mkfs.ocfs2 -b 4K -C 32K -N 4 -L oracrsfiles /dev/iscsi/crs/part1
/etc/fstab:
/dev/iscsi/openfiler:disk01/part1 /d01 ocfs2 _netdev,datavolume,nointr 0 0 -
Difference between free space on disk and column FREE_MB in V$ASM_DISKGROUP
Hi ,
in our RAC environment we have setup an ACFS. We use that mainly for RMAN backups. When connecting to the ASM instance and executing the query
Select name, state, total_mb, free_mb from v$asm_diskgroup;
we are getting the following result:
NAME STATE TOTAL_MB FREE_MB
DG00_CRS MOUNTED 10738 9912
DG01_FR MOUNTED 409592 360173
DG02_DATA MOUNTED 6553568 1628732
DG03_BACKUP MOUNTED 5615920 4227
Seems to me that the ASM instance believes that the amount of frees space in diskgroup DG03_BACKUP is 4227 MB. Butr when checking on
operatingsystem level, the result looks different:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/asm/v03_backup-33
5746196480 2430545120 3315651360 43% /u01/app/oracle/orabackup
=> As a matter of fact, we have about 3,3 TB free space available. Should that result not be shown when running the query above? I currently
don't have a clue why the query returns 4227 MB...
Any help will be appreciated...
Rgds
JHACFS is a 11.2 feature, while ASM existed long before
ASM will consider such volumes as used space when querying V$ASM_DISKGROUP, or issuing lsdg in asmcmd
you can use the views V$ASM_ACFSVOLUMES and V$ASM_FILESYSTEM for ACFS
or volinfo in asmcmd -
"Free Space" Partition disaster on new Mountain Lion iMac
"Help"
I just received a new 27 inch iMac as a replacement for my old machine, which apparently disntegrated during warranty. In setting it up, I tried to create a small partition on the hard drive to run a Linux distro for testing purposes. It seems that with the non-system disc versions of the OS this has become more complex, and what I recall as an easy process turned into a disaster where 2 of the 3 TBs on the machine are locked out as "free space". I humbly retreat from any thoughts of working with partitions on this machine - I just want to clean it up and get it to a one-partition state for music and graphic design production. I have a backup. Here is a snapshot of this nightmare:
I also note that at the top level, where I am used to seeing "Hitachi" (or whomever makes the hard drive) it says Macintosh HD. That can't be right?
Here is a diskutil list report:
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *3.0 TB disk0
1: EFI 209.7 MB disk0s1
2: Apple_CoreStorage 1.3 TB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Hard Drive *1.3 TB disk1
I want to get rid of disk1, I guess, and make disk0 correspond to the 3.0 TB physical volume, not a "Logical Volume Family".
Name: Macintosh HD
Size: 1255995588608 B (1.3 TB)
Free Space: 0 B (0 B)
|
+-< Physical Volume 27B24C33-92E7-4DC1-99B0-165BF47601AE
| ----------------------------------------------------
| Index: 0
| Disk: disk0s2
| Status: Online
| Size: 1255995588608 B (1.3 TB)
|
+-> Logical Volume Family 4FDA0589-59C5-4C94-AFC1-F7E82B21A450
Encryption Status: Unlocked
Encryption Type: None
Conversion Status: NoConversion
Conversion Direction: -none-
Has Encrypted Extents: No
Fully Secure: No
Passphrase Required: No
|
+-> Logical Volume 74E89BB3-AEBF-477C-B7B0-47EE71BC5BB0
Disk: disk1
Status: Online
Size (Total): 1255676813312 B (1.3 TB)
Size (Converted): -none-
Revertible: No
LV Name: Hard Drive
Volume Name: Hard Drive
Content Hint: Apple_HFS
Any thoughts? restarting to Command-R seems like it would not address the partition problem at all. I suppose I could put it in target mode and use my laptop to wipe it, but I'm not sure that would address the partitions either. I am completely comfortable with removing the built-in system recovery area if necessary, as I made a system mount on a USB stick.Two cloning programs:
SuperDuper
Carbon Copy Cloner -
How do I erase the free space on macbook pro retina?
I went to erase the free space on my MacBook Pro Retina in the Disk Utility but it says not available for this type of drive. Is there a way I can get around this?
You can't use Disk Utility to securely erase a Solid State Disk drive, because of the fact that SSD's have limited write capability, unlike hard drives, thus have to protect the sectors from as little writes as possible.
In fact TRIM (wear leveling) is enabled to write new data to the least used sectors on a SSD each time.
The NSA guidelines for secure data destruction on SSD's is to grind them into a fine powder.
If you don't require this level of data destruction, you can do this trick below, but not often or you'll premaurely wear out your SSD.
Finder > Duplicate a small file repeatly in a folder until slightly more than 50% of the remaining free space on the SSD is used up, (use Activity Monitor) then delete this folder.
Then duplicate a different small file repeatly in another folder in the same manner.
What this will do is, because of the small file, OS X will fill the smallest unused spots on the SSD, the duplicates will fill the remaining free space half way, then the second folder will (because of TRIM) fill the other remaining 50% of the free space.
You can't fill your boot drive or the machine can refuse to function or boot, but because of the wear leveling this should overwrite all your available free space on the SSD once.
If you have a laptop and TimeMachine, there is a hidden database on the boot drive which will store a copy of the deleted data.
Then there is "versions" and it's possible a copy of the deleted data is stored in that cache file still on the SSD.
I can advise how to delete the TimeMachine backup file on the boot drive, but not the "versions" database or what it contains.
How do I securely delete data from the machine?
If your really paranoid it's likely best to reformat the entire MacintoshHD partition from recovery and then with a new user, then do the Finder > Duplicate procedure to overwrite the deleted data off the SSD, this way the "versions" and TimeMachine databases are also overwritten.
Nothing is safe anymore.
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