Changing drive permissions

HI,
We have upgraded our Mac Pro Workstation from Snow Leopard to Snow Leopard Server by swapping out the main boot drive for a new, blank drive to install Snow Leopard Server. The reasoning being that if anything went south, we would simply re-connect the original drive to quickly resurrect the machine.
The one thing we never considered was the permissions on the raid array (composed of 3 disks). SL Sever recognizes the drive(s) however the permissions are associated with the old SL operating system and the drive is locked. The permissions within the GUI interface state that the permissions are set to Custom and don't seem changeable - even by an admin account.
Is there a relatively simple way of changing the permissions to that of the current user / group?
Thanks very much in advance for any assistance you can provide.
Regards,
Cdntech.

You can't change the write permissions of the drive. The write capability is determined by two things:
1. The hardware itself -- IOW, a drive with no burn capabilities for DVD's can't burn to that media because it physically lacks a laser that will do that.
2. The type of media & its state. For instance, commercial DVD's are pressed, not burned, & their media layer can't be changed by shining a laser on it, period. DVD-R's can be written to once & only once. DVD-RW's can be erased & reused, but it is an all or nothing process.
What type of DVD have you put into the drive?

Similar Messages

Changing Sharing & Permissions on a Mac OS Extended External Drive

I'm using ChronoSync to back up to 4 external hard drives. Three of them were formatted as Mac OS Extended (Journaled), while the 4th is not journaled. On the journaled HD's, I can change the privileges for me, staff and everyone in Get Info; I can also check or uncheck "Ignore ownership on this volume" on 2 of them. My Time Machine volume doesn't have the option to ignore ownership. My issue is that changing privileges on the Mac OS Extended volume is grayed out, and the box to ignore ownership is checked. Therefore, Chronosync cannot write to the volume.
I could try to use chmod in Terminal to change permissions on this volume, but I don't know the syntax to get to a mounted volume (I know they're listed in /Volumes).
So I have two questions:
1. Does this issue indicate a substantial difference between journaled and not-journaled Mac OS file systems?
2. What is the syntax in Terminal to change the permissions on the volume (name is Video Backup) so that I can at least uncheck the "Ignore ownership on this volume"?
I apologize if this has been asked and answered elsewhere on this forum, but I wasn't able to locate such a discussion.
Thanks,
Nick
Message was edited by: nickditoro

Hi mackjack,
The commands Niel posted were to regain access to a drive not to change existing permissions. Nonetheless, I executed them so at least I know the syntax to use in order to get to an external hard drive (something I hadn't known before), so thanks!!! I might try chmod 770
Update:
Now that I know the basic syntax (thanks to you) I can now change permissions for any user I like. Chronosync is able to synchronize to the drive.
Thanks!!
Nick
Message was edited by: nickditoro

How do i get my external hard drive permissions changed from read only to read and write?

Does anyone know how to get an external drive to unlock the permissions from read only to read and write? Without reformatting or buying an app?

Hey P,
If you single click on your external drive icon on the desktop and then goto
'File > Get Info' a window will display the information for that drive. At the
bottom of the window their should be a check box that either allows you
to recognise users of not. You probably want to uncheck this box.
Or... You can keep the user option and just change the permissions
using the same Get Info window.
A.

System Folder errors after I changed all permissions on HD to read & write

Hi,
Two things may have caused probs on my new 2010 iMac (Snow Leopard), and Applecare is shut so I would really appreciate some help as I have urgent work.
1) INCORRECT PERMISSIONS
I have been stupid. I clicked on Macintosh HD and changed all permissions to read & write because I wanted to be sure I could open and edit all documents on other computers.
I ran Disk Utility Repair Permissions from the install disc, but I am still getting system error messages, and my HP printer won't work.
The first message, in Repair Permissions, said: Warning: SUID file System/Library/Cores has been modified and will not be repaired. I have read a support doc on this which says no need to worry but I don't like it and would like to fix this.
More importantly, my HP printer won't work, displays error beside the document in print dialogue box.
Deleting the printer and readding it didn't work, so I downloaded new drivers and tried to install them, which is when I got the second system error message: System extension System/Library/Extensions/BJUSBLoad.kext was installed improperly and cannot be used. Please try reinstalling it or contact product's vendor for an update.
I checked the permissions on the file and they were still wrong despite Repair Permissions, allowing everyone to read & write. So I have now clicked on the entire System folder and changed the permissions to: System read & write, admin read only, everyone read only.
Will this fix it or do I need to do something else, such as check ownership, to make sure all permissions on the computer are now correct?
2) MEMORY STICK SHUT DOWN MY IMAC
Additionally (though I don't think this had anything to do with my problems), I inserted a Sandisk USB memory stick the other day and it immediately shut down the computer. When I inserted it into my Macbook it initially rejected it and gave me a message saying the device wanted too much power so it had ejected it to prevent damage to my computer. When I tried again it was OK. I totally reformatted the stick in case there was something harmful on it, but should I now bin the stick as faulty? Scared to use it again.
3) IS IT BEST TO REINSTALL ENTIRE SOFTWARE?
If I do a reinstall of all the software from the install disc, will it wipe out all my data, such as Mail, documents, bookmarks and other apps?
I would back-up, but if I try and back up files on my external drive it will automatically do a Time Machine back-up and I don't want to do that in case it backs-up all the corrupted files. Otherwise, I wouldn't mind starting again just to be sure all is well.
Expert advice would be very much appreciated.
Thank you
Sarah

Oh, silly really. I was in a hurry and working on docs that I needed to take to the office and open on another computer there.
But when I checked the permissions on the doc it said I could read & write but everyone else was read only.
I thought if I opened it on another machine I'd be stuck with read only access and not be able to work on there. I think I couldn't change it, so I thought to avoid any future problems like that I would change everything on machine!
Yikes. Won't do that again
Sarah

Why can't I change ACL permissions of a volume on mac os x 10.6

Hello,
I'm currently working with a Mac OS X 10.6.8 Server with 2x1TB drive installed in RAID configuration (/Volumes/LTRK) and 1x2TB installed as a regular volume (/Volumes/LTRK2/). For both volumes I could set all permissions perfectly, but recently, I cannot change the permissions on the 2TB volume. I have the following current permissions:
ACL:
Group of regular division members (read + all descendants)
Group of ICT co-workers (read/write + all descendants)
Administrators (read/write + all descendants)
Everyone (read + all descendants)
POSIX:
The admin user account (read/write + this folder)
The 'staff' group which is automatically there (read/write + this folder)
Others (read + this folder)
If I compare to the drive where I can change the permissions and where everything works correctly (the RAID config), the only difference is that the 'Everyone' group permissions are not set to be inherited for the working drive (so only on the volume level). I wanted to check whether this was the source of my problems and tried to change the permissions of the 'Everyone' group. However, as soon as I click Save in Server Admin, it automatically reverts to all descendants.
The results of the failure to reset the permissions, leads to the fact that I don't have write access anymore with the admin user accound (I guess due to counteracting permissions). I also tried to delete all permissions from the volume with "chmod -R -N /Volumes/LTRK2" but this gives me a list of every file on that volume, with the error message: "chmod: Filed to clear ACL on file filename: Invalid argument"
Does anyone have any suggestions on how to solve this issue?
Kind regards

Welcome to iMovie Discussions.
See my 2nd reply to 'getzcreative', here.

Can't update iPod - external hard drive permissions error

I'm trying to change file permissions on an iTunes folder on an external hard drive. I'm able to get to the folder, but when I open the documents info screen, the Ownership and Permission section of it is disabled and I can't change it. I'm the administrator of the computer- there are no other users other than me, so I assume I can change permissions for a folder.
The problem is that all the easy options (I'm no UNIX tinkerer) are grayed out. I don't have the option to lock/unlock, change permissions, etc... because there is no way to access these options. See the screenshot of the folder here:
http://digital-goddess.com/img/itunes_screengrab.jpg
I have tried changing permissions on the parent of this folder and applying to all subfolders, but that didn't change this folder or my access to it. This folder holds half my iTunes library and throws up an error that I don't have sufficient permissions to update my iPod. This is very annoying and worrisome. Any help?

Sorry, I forgot one step.
When you expand 'Details' a button called 'Apply to enclosed items..' appears. Click on that to apply all permissions to the files inside the folder.
You can also use a free (donationware) utility called BatchMod to set the correct permissions.
Hope this helps.
M
Edit:
Just realized, you have that folder on an external HD.
Apply the Ownership & Permissions to all contents of the drive to prevent possible trouble with other applications.
17' iMac fp 800 MHz 768 MB RAM Mac OS X (10.3.9) Several ext. HD (backup and data)
Message was edited by: macmenno

Overwritten temp folder / drive permissions

Hello,
I have this annoying issue with windows 8.1, my temp folder permission is changed periodically (like once a month or so) and I have to change it back manually, but I don't know what and why is doing this.
And right now this issue is grown, When I'm trying to copy or save a file to my secondary HDD a Windows allert pops up saying something like this: A required privilege is not held by the client (0X80070522)
Than I looked up the permissions and the Authenticated User was blanked out none of the checkboxes were checked
The funny thing is that Windows put the boot to that drive and haf of my softwares are also there and still something was able to change permissions (and or Ownership),
I would think Windows protects the MBR more.
So, I would like to know how can I resolve this and get my rights back to my HDD and find what is messing with my folder and drive permissions. Oh and is that right that the owner on that drive is TrustedInstaller because on my other drive Administrators
are the owner?
And please don't say to delete my user account because I use a lots of software which needs configuration (like IIS, MySQL, etc..) and right now I don't have a day or two to reconfigure everything.

Hi,
For this issue,please reset the security settings on your system from the following article.
http://support.microsoft.com/kb/313222
Note:This article is for windows vista and let us test if it works Windows 8.1.
Just run in a evalated prompt the following command.
secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose
If the issue persists,please reset all permissions, run this command:
icacls * /reset /t /c /q
Regards,
Kelvin Xu
TechNet Community Support

External Hard drive permissions

I have a 4 TB external hard drive which is formatted as NTFS - when I load it on my mac I can only read the drive and cannot edit, add, delete etc. therefore obviously making it useless!
This problem hadn't occurred to me before purchasing my mac so I guess I have 2 questions,
1. Is there a single format that I could use which would allow me to read and write on my Windows PC and Mac.
2. Is there a stable and reliable way of changing the permissions on this drive so that I can read and write on both my mac and PC? Also as it is several TB in size and I do not have a larger drive to back it up to is there a way I could do this without losing the data??
Thanks

Great I'll try formatting it to that - will I be able to use Disk Utility to do that??
I've downloaded paragon which has worked a treat for now but I don't particularly want to pay for it... needs must perhaps though.

Change DVD permissions

change DVD permissions on OSX 10.5 ancient G4 powerbook

Or have the computer's optical drive (5) region Codes been used up?
{This is kind of like a guessing game.
...But don't know if I'm having fun yet.}
Good luck & happy computing!

Changing folder permissions, deleted account

EDIT: Figured it out. I had to enable the root user and make a new folder.
I recently had a hard drive failure, no backup other than random files on a hard drive.
I created a new account on a fresh install of OSX, and I no longer have permission to view folders on the old hard drive.
How can i change the permissions when the folder doesnt know what its permissions are?
I tried the old account name, user name, and password, but none worked.

Unlock the lock (bottom right)
Click the + add yourself and give yourself read and write privelidges
Click the gear and apply to enclosed items

External hard drive permissions - altered?

I attached my (relatively) new external HD to do a full time machine backup after installing Yosemite, but the backup was refused as the drive was listed as "read only." This is a Mac OS extended format and I have been using it for about a month with no issues. It was not a read only drive before. Disk Utility will not allow me to change the permissions. My questions:
1. Why is my external HD now read only?
2. How can I change it back so I can do backups again?
thanks!
john

Hi John,
If you are having an unexpected read-only error on your Time Machine volume when trying to back up, you may want to try the troubleshooting steps outlined in the following article:
Time Machine: Troubleshooting backup issues
Regards,
- Brenden

Want to change my Permissions on my account

Hi. I need to update my "Personal" account to have the same access as the root. When I go into "Accounts" it lists my account as "admin". Yet I still can't access everything.
Is there a way to make my login account equal to root?

Okay,
Here's the way I dealt with the permissions problem:
Right-click on a folder that is giving you trouble. I would suggest you start with the folders in the main directory of your hard drive, as in Macntosh HD\Video\ as opposed to Macintosh HD\Video\Final Cut Projects\.
Choose "Get Info" from the menu
At the bottom of this window, you will see "Sharing & Permissions." Left-click on the lock icon at the bottom left. Assuming your account has administrator privileges it will prompt you for a username and password then allow you to edit the permissions.
You should see the name of your account listed (with "me" next to it in parenthesis), along with "Read & Write" in the "Privileges" column.
If you only see "Read" in the Privileges column, left-click the up/down arrows and choose "Read & Write."
If don't see your account listed at all, hit the "plus" icon and choose your account.
If your current account is the primary user, I would suggest highlighting your account and selecting "Make ACCOUNT NAME (Me) the Owner" from the asterisk drop-down menu to the left of the plus/minus buttons.
Once you're satisfied with your choices, choose "Apply to Enclosed Items" from the asterisk menu. This will take a second, as it is changing the permissions for the files and folders saved within this file.
Now, if someone who has more Mac experience and/or a deeper knowledge of permissions and file structure sees something wrong with these instructions, please let me know. I figured this out because I had to get access to my Media HD, not because I was trained in Leopard theory.
But so far it's worked for me -aside from loosing and FCP 5.1 project . . . one of my files can no longer be loaded by FCP. But I did reinstall FCP after erase and install of leopard, so I think it has to do with FCP versions more then permissions issues.
Is this what you needed?
CMF
If you see any accounts listed as "unknown" select them and then hit the "minus" button at the bottom.
Message was edited by: Smileswearily

FireWire Drive Permissions

Hello and thanks in advance for the support.
I'm sharing my home computer with my 3 year old daughter and have set up a user account for her.
From her account, I changed the permissions of my firewire drives to NONE so she could not delete any files. I assumed this would affect only her user.
I was wrong, and now when I start up, no fire wire drives appear. No icon is apparent so I can't go back and change the permissions back.
The drives appear in the disk utility but I can't change permissions from there.
How can I change the permissions of my drives back to normal?
Any help much appreciated.
Yes, I've learned the simple finder option for her user is a better approach:)

Let us assume the drive's name is "My Nice Drive" (You will have to substitute whatever name you gave it). Do as follows
connect your drive
Open Terminal (found in /Applications/Utilities/)
In Terminal type the text in the grey zone (or copy and paste it) and hit return
ls -l /Volumes
You should see a line that reads somehow like
d---rwxr-t 48 root admin 1734 Sep 22 14:34 My Nice Drive
If that line does not appear, post back for more info... If it appears read on
Still in Terminal, type (don't forget to substitute your drive name for "My Nice Drive" and put it inside quotes if it contains spaces like the example) hit enter and give your password when needed
sudo chmod ug+rwx /Volumes/"My Nice Drive"
sudo chmod o+r /Volumes/"My Nice Drive"
Normally your drive should appear on the desktop. If it does not, logout and then back in
In case of doubts, write back...

Drive Permissions Problem

I have several hard drives.
All of the drives and enclosing folders have been set with the following permissions ...
owner = system
access = read and write
group = admin
access = read and write
others = read only
- ignore ownership on this volume = unchecked
- for some reason one of my drives is not using permissions correctly. Even know I reset all the permissions ( and copy permissions to enclosed folders) for the drive as above several times - it has the following problems ...
- every new folder I create uses a different permissions set up from what is listed above...
- if I tried to delete a folder on the drive - it says it will be deleted immediately - rather than putting it in the trash...
- this is just a dated Drive - there is no system on it.
- I ran disk utility on the drive - repair disk - but it did not help.
* Question: How can I fix this? What is going on? I sure would hate to reformat the drive...

Rev,
First, I'll advise you not to try to change permissions on an entire drive with the "Apply to enclosed items..." button. Hidden files on that drive should have specific permissions. Like the .Trashes folder and its sub-folders. You cannot change the permissions on a folder or file unless you own the file or you are the root user. The "Apply to enclosed items..." button will not work if you do not own the enclosed files or folders.
Firewire drive are set to "ignore permissions" when you initialize the drive (put a file system on it). Unchecking the box in the Finder's Get Info window can produce varying results. In the Terminal application, type:
vsdbutil -c
and a space. Drag the hard drive icon on to the Terminal window. If the drive is permissions enable you should see something similar to this.
Permissions on '/Volumes/<nameofvolume>' are enabled.
If the drive is set to ignore permissions you cannot change the owner or group of the folder or file until the ignore permissions bit is removed from the volume header. It is "legal" to have an attached drive set to "ignore permissions" or have a drive owned by a specific user other the root (system). My preference is to have every attached drive owned by root (system) with read, write, execute permissions, the group set to admin with read, write, execute permissions, and others set to read and execute. With this setup only the root user or an admin user can grant rights within the drive's file system.

Airport Hard Drive Permissions

Hello, I have a AirPort Extreme with a 3T hard drive connected to it. and If I check the permissions via my computer it says
(Unknown) Read& Write
everyone No Access
I have no idea who unknown is, and If I try to change the privieges, it tells me i dont have the permissions to make theses changes. I am an admin, and I did try to go in has root. Still no luck. So My Media hubs cant access the files on my HD.
Please help/

That is because once connected to the AEBS it becomes a network drive. You then have to mount the network drive in order to use it.
You should not change the permissions attached to the drive after you have partitioned and formatted it. Be sure you have prepped the drive for this use:
Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Eject the drive upon completion and connect to the USB port on your AEBS. Open Airport Utility to configure it under Drives and turn on Sharing and File Sharing. You can then mount the drive for use by selecting Connect to Server under the Finder's Go menu.

Changing drive permissions

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