Content modification control

An electronic apparatus for transactional modification of content in a solid state storage of a device, comprising logic operable to perform a method to:

• receive a delta data structure comprising at least one delta targeting at least one data block;
• copy a first data block targeted by said at least one delta from said first data block's home location into a non-volatile store;
• modify a first flag of a plurality of flags stored in said delta data structure following said copying of said first data block;
• read said first data block into memory;
• modify said first data block in memory according to said at least one delta to produce a ready-to-write data block;
• erase a target location;
• write said ready-to-write data block to said target location;
• modify a second flag of said plurality of flags stored in said delta data structure following said modifying said first data block and said erasing said target location;
• record in said delta data structure that said first data block has been modified;
• responsive to a restart of the device following an interruption to said method, test for existence of said plurality of flags in said delta data structure;
• and
• responsive to said plurality of flags existing in said delta data structure, scan said plurality of flags for an unmodified flag and resume said method from a point corresponding to the unmodified flag.

A non-transitory computer-readable medium having stored thereon instructions that, when executed by a computer, cause the computer to perform a method to:

• receive a delta data structure comprising at least one delta targeting at least one data block;
• copy a first data block targeted by said at least one delta from said first data block's home location into a non-volatile store;
• modify a first flag of a plurality of flags stored in said delta data structure following said copying of said first data block;
• read said first data block into memory;
• modify said first data block in memory according to said at least one delta to produce a ready-to-write data block;
• erase a target location;
• modify a second flag of said plurality of flags stored in said delta data structure following said modifying said first data block and said erasing said target location;
• write said ready-to-write data block to said target location;
• record in said delta data structure that said first data block has been modified;
• responsive to a restart of the computer following an interruption to said method, test for existence of said plurality of flags in said delta data structure;
• and
• responsive to said plurality of flags existing in said delta data structure, scan said plurality of flags for an unmodified flag and resume said method from a point corresponding to the unmodified flag.