CS439: Principles of Computer Systems
Due: 8:45a Friday, April 12, 2013 Homeworks
will be submitted electronically. Please refer to
the homework turnin instructions.
Is it fundamentally necessary to store on disk the information about the
unallocated disk sectors? Explain why.
Pooh Software Ltd. is selling a file system that
uses a UNIX-like file system with multi-level indexing. For more reliability,
the inode array is actually replicated on the disk in two different places.
The intent is that if one or a group of sectors that are storing either
replica of the array become bad, the system can always recover from the
replica. Discuss the effect of having this replicated data structure on
True or False. A virtual memory system that uses paging is vulnerable
to external fragmentation.
Some file allocation schemes limit the size of the file whether or not
there is enough space for a larger file. Which ones and why?
- Multi-Level index
Which file allocation scheme that we studied is most similar to paging?