Corruption is when you write data and you read back different data of the same size. Data loss is when you write data and you read back correct data of the smal

Corruption is when you write data and you read back different data of the same size. Data loss is when you write data and you read back correct data of the smaller size or nothing. Not sure what you mean by entire fs transaction. But Linux doesn't have transactional fs interface, so open, write, close can be interrupted at any point with result of just having a new empty file after open, being one of the valid outcomes after crash.