Permissions problem with External Hardrive

Sorry to drag up this old topic, but I have a situation on a friends iMac that I cannot correct following the steps here.
It has an external drive connected that is data only, no MacOS. I have followed step #3 by typing the following chmod 775/Volumes/G-DRIVE/
I get a reply in the Terminal Window that shows:
usage: chmod [-fv] [-R [-H | -L | -P]] [-a | +a | =a [# [ n]]] mode |entry file... static-72-67-xxx-xxx :~accountname
(the x's represent the static I.P.)
but I still cannot see the drive.
Does this have to be done from the account that caused this issue, or can it be done with any account that has Admin privileges?
Sorry about dual posting. I picked up a thread that shows as solved earlier and can't delete my post there.

Thank you, it worked. I missed the space after 775.
He was trying to keep people from having access to the external drive when signed into that account.

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Permissions problem with external HD

Prior to updating to 10.4.3, I was able to write to any external HD to transfer large files betweek my iBook and a windows PC. After upgrading, I am no long able to use 3 out of the 4 external HDs that I used to be able to. I always get an error message stating a problem with permissions. I get info on the drive and it says read only and will not allow me to change to read and write. I plug the same drive into my Windows PC and change the permissions to read and write, and get the same message when I go back to my iBook, I get the same read only problem.
Any ideas?

Eric,
I, too, apologize for the delay in posting. I have been away from the discussions for a rather extended period.
Well, any NTFS formatted volume will only be accessible to you as read only. No, this is not something new, but has always been the case. To make matters worse, I have heard that Windows no longer provides any way to create a FAT-32 volume; one must use OS X to format the volume or use a third-party application in Windows. This information may be incorrect, but I wouldn't be surprised if it is true (we're talking about Microsoft, here).
If you can copy any data on this drive to some other location, then use Disk Utility to format it as FAT-32, the data can then be copied back and it can be used to transport the data cross-platform, with read/write access on both ends. Is this a possibility for you?
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Permissions problem with External Hard drive.

Hi,
I've been using my external hard drive for almost a year now and out of the blue last night I ran into a interesting problem. For some reason I couldn't transfer any files to a thumb drive and shortly after I realized I didn't have Read and write permissions for any files on my mac, and everything required my password to get to. I went into disk utility and repaired the permissions and the list went on forever. Upon completion of that nothing was resolved.
SO! I popped in my Snow leopard disk and did a repair of the permissions and system through there hoping that would fix it. I than booted up the main drive and got stabbed in the face with a HUGE error message upon the apple loading screen with a "MISSING DRIVER" "KERNAL ERROR" "CORRUPT FILE" etc.
I went back and did a restore from my external harddrive hoping that would work, and it did. I can access my time machine backups from my external harddrive but cannot do so through my own control.
What should I do? Should I reformat my external harddrive? Which would suck because I'm a paranoid freak and if something would happen during the reformatting I will lose literally over a year of work that is crucial.
error message upon opening my backup
http://s91.photobucket.com/albums/k302/nomhak/?action=view&current=Screenshot201 0-03-01atMarch1-201061.png
error message upon trying to backup
http://s91.photobucket.com/albums/k302/nomhak/?action=view&current=Screenshot201 0-03-01atMarch1-201-1.png
icon of backup drive
http://s91.photobucket.com/albums/k302/nomhak/?action=view&current=Screenshot201 0-03-01atMarch1-201062.png
Can anyone shed some light?

nomhak wrote:
I went back and did a restore from my external harddrive hoping that would work, and it did. I can access my time machine backups from my external harddrive but cannot do so through my own control.
What is that, a "clone?" What do you mean by "cannot do so through my own control."?
What should I do? Should I reformat my external harddrive? Which would suck because I'm a paranoid freak and if something would happen during the reformatting I will lose literally over a year of work that is crucial.
Again, what's on that drive? Do you have a clone and TM backups on the same external? If so, are they in the same partition?
error message upon trying to backup
http://s91.photobucket.com/albums/k302/nomhak/?action=view&current=Screenshot201 0-03-01atMarch1-201-1.png
This one says you need to repair or reformat the disk; that means your backups are corrupted.
Try to do a +*Repair Disk+* (not permissions) on it.
If there are errors that Disk Utility can't fix, or the +*Repair Disk+* option is grayed out (meaning OSX has already determined that it can't fix it), post back.

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Starting today I have been unable to copy anything to my 1T Seagate FA GoFlex external HDD. I can access the drive, I can copy files FROM the drive back to my Mac Mini, but I cannot copy anything to the drive. Whenever I try to copy anything I get the error "The operation can’t be completed because an unexpected error occurred (error code -50)." I have spent the last four hours doing an exhaustive search, and have tried every solution I've come.
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Message was edited by: web-betty (replaced screenshots)

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Eric,
I, too, apologize for the delay in posting. I have been away from the discussions for a rather extended period.
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Permissions problem with External Hardrive

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