292:) each. When the content of the image changes, one or more band files is changed, created, or deleted. This allows easier shrinking of the amount of space used on the underlying filesystem when a large amount of data is deleted inside the disk image, as long as the code supporting the filesystem inside the image notifies the kernel of the "releasing" of blocks, as happens in filesystems that support SSD "trim" operations to be triggered automatically for de-allocated filesystem blocks.
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A customized ".sparseimage" image file can be assigned a larger total capacity than the physical volume (or HD partition) on which it originally resides. While the virtual volume will seem to make that capacity available, attempting to exceed the physical capacity of the underlying volume will result
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the backup destination no longer needs to be an HFS+/HFSX volume (for the hard links to work and to preserve metadata), but can be any shared folder, on any server, connected using any protocol and using any file system to store the actual
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the entire sparse bundle is replicable from one location to another; this is particularly useful when upgrading the backup storage and when the on-site backup storage needs to be replicated to an off-site backup storage. A tool such as
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that grows in size as the user adds data to the image, taking up only as much disk space as stored in it. Encrypted sparse image files are used to secure a user's home directory by the
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image files automatically expand to their preassigned limit when data is added, they cannot be arbitrarily resized without the use of
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Two limitations are therefore worth noting regarding the use of this image file format:
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feature in Mac OS X Snow
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may be used to keep one or more disk images consistent across various systems.
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file must first be moved to a larger physical disk or partition.
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Sparse bundle advantages over non-diskimage backup for
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filesystem for reading macOS sparse-bundle disk images
380:"Live FileVault and Sparse Bundle Backups in Leopard"
280:. Instead of a single big file, a sparse bundle is a
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49:. Unsourced material may be challenged and removed.
284:(directory) containing a number of files called
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410:"Backing up Sparse Bundle Images Over SSH"
245:in a disk error: "ran out of space". The
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464:This Macintosh-related article is a
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47:adding citations to reliable sources
468:. You can help Knowledge (XXG) by
150:Uniform Type Identifier (UTI)
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34:needs additional citations for
276:introduced the concept of the
252:As noted above, while mounted
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353:"hdiutil(1) OS X Manual Page"
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41:Please help
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236:Limitations
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509:Categories
384:macosx.com
337:August 13,
317:References
207:disk image
181:disk image
171:Apple Inc.
99:March 2011
69:newspapers
412:. LBackup
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359:. Apple
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195:objects
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90:JSTOR
76:books
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418:2013
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339:2020
226:.dmg
62:news
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