Disk Utility "Resize Image" ghosted

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Level 1

26 points

Disk Utility "Resize Image" ghosted

Just want to resize a disk image Folder. However the Resize Image icon AND the Resize submenu in the Images menu are both ghosted. I am following the Disk Utility Help instructions:

Resizing a disk image
If you can read from and write to a disk image, you can make it larger or smaller when you either need to save disk space or store more information in it.

"To resize a disk image:

Select the disk image if it appears in the list at the left, and then click Resize in the toolbar.

Otherwise, click Resize in the toolbar, and then select a disk image from the dialog that appears.

Select a new size."

bob

MP 2.26 GHz dual quad, 6 GB, Mac OS X (10.6.2)

Posted on Aug 29, 2010 10:41 PM

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Answer 1

baltwo

Level 9

62,386 points

Aug 29, 2010 11:29 PM in response to Bob Savryk

AFAIK, there's no such thing as a disk image folder, but there is make a disk image from a folder. Unmount the image and select it. Now, follow the steps.

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Answer 2

TeenTitan

Level 4

2,640 points

Aug 29, 2010 11:34 PM in response to Bob Savryk

make sure the disk image is not mounted
on the left column click ones on the disk image you wish to re-size
now the re-size button should not be grayed out.

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Answer 3

Bob Savryk Author

Level 1

26 points

Aug 30, 2010 3:02 PM in response to baltwo

Hello baltwo,

Thanks for your quick response. Regarding my terminology, "disk image folder", I can accept that usage as incorrect; by your answer you knew what I meant.

I did unmount the disk (image) by clicking the Unmount icon; the Resize Image icon remains ghosted.

bob

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Answer 4

Bob Savryk Author

Level 1

26 points

Aug 30, 2010 3:09 PM in response to TeenTitan

Thanks TeenTitan,

I have followed those steps and the Resize Image icon remains grayed-out.

bob

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Answer 5

baltwo

Level 9

62,386 points

Aug 30, 2010 3:36 PM in response to Bob Savryk

Then, remove the disk image from DU's window, select Images, and resize should be usable. Select it and drill to the disk image you want to resize. If you get an operation not supported, then I suspect it's read only and that's why. Alternatively, use the CLI command hdiutil. Details in the manpage.

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Answer 6

Bob Savryk Author

Level 1

26 points

Aug 30, 2010 7:59 PM in response to baltwo

baltwo,

"Resource temporarily unavailable" - this msg resulted from dragging the disk image out of DU (it never actually left the left panel but did allow me to select the Images menu).

Regarding 'Read only' - since this dmg was made from the DU, it produced a file with the Owner's permissions as: R&W; Staff as Read only; Everyone as Read only.

Regarding CLI alternative - since DU has the "Resize Image" feature, it should work from within DU.

I'm willing to learn DU,

bob

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Answer 7

baltwo

Level 9

62,386 points

Aug 30, 2010 11:16 PM in response to Bob Savryk

Go for it then. However, DU's help does state: *+If you can read from and write to a disk image, you can make it larger or smaller when you either need to save disk space or store more information in it.+*

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Answer 8

Bob Savryk Author

Level 1

26 points

Aug 31, 2010 11:42 PM in response to baltwo

Thanks for cheering me on; however, DU is not cooperating; I still am getting one of two msgs:
"Resource temporarily unavailable" or "operation not supported."

The only solution I have found so far is a kludge approach: File -> New -> Blank Disk Image
then select a size (e.g. 40 MB)
then when this is full make another Blank Disk Image of a larger size
then drag the previous image contents into the new larger disk image.

I'm using OS X 10.6.2, so is it a bug in this (Version 11.5 (298)) of DU?

bob

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Answer 9

baltwo

Level 9

62,386 points

Sep 1, 2010 8:47 AM in response to Bob Savryk

Don't know a way around the dilemma. However, if you want to report this issue to Apple's engineering, send a bug report or an enhancement request via its Bug Reporter system. To do this, join the Mac Developer Program—it's free and available for all Mac users and gets you a look at some development software. Since you already have an Apple username/ID, use that. Once a member, go to Apple BugReporter and file your bug report or enhancement request. The nice thing with this procedure is that you get a response and a follow-up number; thus, starting a dialog with engineering.

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Answer 10

Bob Savryk Author

Level 1

26 points

Sep 2, 2010 1:21 PM in response to baltwo

Thanks baltwo,

That's good advice; I will do that.

bob

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Answer 11

baltwo

Level 9

62,386 points

Sep 2, 2010 4:24 PM in response to Bob Savryk

Thanks for the feedback. Good computing.

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Answer 12

andyBall_uk

Level 7

20,516 points

Sep 2, 2010 4:36 PM in response to Bob Savryk

I think the dmg has to be created as a read-write - or at least resize does work when that's the case, but doesn't when the default 'new image from folder' options are used

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Answer 13

Bob Savryk Author

Level 1

26 points

Sep 6, 2010 12:05 AM in response to baltwo

You're welcome.

bob

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Answer 14

Bob Savryk Author

Level 1

26 points

Sep 6, 2010 12:10 AM in response to andyBall_uk

andyBall_uk,

Thanks for your input; I have already tried that by choosing File -> New -> Blank Disk Image, which resulted in a Disk Image with an Owner permission of READ/Write. However, neither the resize icon nor the Images menu Resize ... were active (ghosted each try).

bob

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Answer 15

andyBall_uk

Level 7

20,516 points

Sep 6, 2010 2:52 AM in response to Bob Savryk

Hi Bob

I just tried exactly that too - the dmg is resizeable here, but only after unmounting.
Previously I used new image from folder & chose read/write.

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