Mac disk utility image format sparse

Sparse Image: A Secure Disk Image For Your Mac

With TrueCrypt you specify the size of the image, and the total size of the image is dedicated on your hard drive. When setting up the Sparse Image , you set up the maximum size of the image, but the image itself grows dynamically as you begin to use it for storage. For example: As the 26 MB space begins to fill, the Sparse Image will begin to take more hard drive real-estate until the maximum allocation of 2.

Unlike TrueCrypt , the container created by Sparse Image is elastic, expanding as you need it, and capping off at its maximum size. This dialog box will appear: Do the following in the New Blank Image dialog box: Enter the name for the Sparse Image you are creating in the Save As dialog box.

How to Use Mac OS X Sparse Bundle Disk Images

Choose where you want to save your Sparse Image. I suggest the Desktop. It makes it easier to open the disk image.

From the drop down dialog box, choose the maximum Size Cd and DVD references are used to help you evaluate sizes you want for the Sparse Image. Select the level of encryption to be used. The recommended Bit AES will work fine. For those paranoid about security, a Bit AES is offered, though some performance penalties will result.

Choose Sparse Disk Image as the image format. Click the Create button.


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Another dialog box opens asking you make up a secure password and type it twice. If you store the password with Keychain access, no password will be needed to open the Sparse Image.

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Better WordPress Security Fix. Leave a Reply Cancel reply. Search LarryTalksTech: The options here are supported filesystem formats in OS X, which include both case-sensitive and case insensitive options, with and without journaling support. Case-sensitive filesystems differentiate between capital and lower case letters in names. Generally keep the default case-sensitive filesystem for your formatting, unless you have specific need otherwise.

Journaling is a feature that caches file writes in a special sector called the journal, before they are written to disk. This helps prevent interruptions in the writing process from causing corruption to the data on disk. For the most part, enabling journaling will help preserve the integrity of data stored on the disk. Encryption This option is for the disk image file, and not the disk contained within the image.

When set, the image file will be encrypted at either bit or bit encryption. Selecting these options will require you supply a password for the encryption.

Partitions This is where you set whether or not the disk within the image is to have a partition map. This can be used if you plan on doing any work with the image that requires partitioning or special properties of a partitioning scheme. One example here is the use of a disk image as a netboot device, where it will require a GUID partition map. Image Format These options allow you to set the specific format of the disk image file itself.