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harv47 Author

Level 1

27 points

How to unlock a locked drive?

Partial output from diskutil list:

/dev/disk5

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *1.0 TB disk5

1: 0xEE 1.0 TB disk5s1

Partial terminal session:

Macintosh:~ harv$ diskutil mount /dev/disk5

Volume on disk5 failed to mount; if it has a partitioning scheme, use "diskutil mountDisk"

Macintosh:~ harv$ diskutil mountDisk /dev/disk5s1

Volume(s) mounted successfully

Macintosh:~ harv$

Disk Utility can't do anything with this disk.

Drive Genius sees the drive, but says it must

be unlocked before I can initialize it.

How do I unlock it?

Thanks,

Harv

Mac Pro (Early 2008), Mac OS X (10.7.4)

Posted on Jul 8, 2012 5:15 PM

Top-ranking reply

Kappy

Level 10

361,849 points

Posted on Jul 8, 2012 5:17 PM

Try:

Fix Permissions for a Locked Drive

Open Terminal in the Utilities folder. Paste the following commands at the prompt. Press RETURN after each. The first command will prompt for you to enter your admin password. It will not be echoed to the screen. After entering your password press RETURN again.

sudo chflags 0 /Volumes/*

sudo chmod a+rx /Volumes/*

killall Finder

An alternative is to download BatChmod and use it to fix the permissions.

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23 replies

Kappy

Level 10

361,849 points

Jul 8, 2012 8:32 PM in response to harv47

What do you mean by "Disk Utility can't do anything with it?" Have you tried repairing the drive or repartitioning the drive?

WZZZ

Level 6

13,226 points

Jul 9, 2012 8:05 AM in response to harv47

I'm seeing Partition Map Scheme: Unformatted. It should be GUID Parition Table. You have to go back in and enter that.

See this article from Pondini

http://pondini.org/OSX/DU1.html

Kappy

Level 10

361,849 points

Jul 9, 2012 11:46 AM in response to harv47

Did you repartition the drive per Step 3? If so and you still are having this issue then I would contact Newer Tech's support to see if they have a solution.

WZZZ

Level 6

13,226 points

Jul 10, 2012 9:16 AM in response to harv47

That error might mean the drive itself or the chipset in the enclosure is failing or failed. (Partition Map Scheme is still showing up as Unformatted.)