Make sure you understand construct the relationships between ip-> addrs[], the indirect block, the doubly-indirect block and the singly-indirect blocks it points to, and data blocks. make sure you understand why adding a doubly-indirect block increases the maximum file size by 16,384 blocks (really 16383, since you have to decrease the number of direct blocks by one). think about how you'll index the doubly-indirect block, and the indirect blocks it points to, with the logical block number. if you change the definition of ndirect, you'll probably have to change the size of addrs[] in struct inode in file. h. make sure that struct inode and struct dinode have the same number of elements in their addrs[] arrays.

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explanation:

we can all learn from our past mistakes because we all have different ways of learning different types of techniques. my way may or may not another classmate remember and have the repetition to acknowledge such standard. such as remembering acronyms. using abbreviations to us remember keep things in order in our memory. this us figure out what comes next in the sequence. if so, what we have is a sentence of just letters all in caps. we either know the meaning or have no idea what it stands for. most of the time we know the meaning and context. but most of us who don't know, should learn by having a quick glance at what needs to be remembered. such as repetition in the memory for acronyms. one way that me, is the fact that i'm always doing math and english assignments. so we have to remember specific meanings such as soapstone for documents, such as citing correctly. or pemdas for doing the equations correctly, even if it's the super long way. this works for everyone. you just have to find what works for you by practicing and repetition daily.