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Write short note on recovery regarding the file system in Windows 2000.
In many file systems a power breakdown at the wrong time can damage the file system data structures so severely that the entire volume is scrambled. NTFS has a variant approach to file-system robustness. In NTFS all file-system and data-structures updates are performed inside transactions. Previous to a data structure is altered, the transaction writes log records that contains redo and undo information then data structure has been changed the transaction writes a commit record to the log to signify that the transaction succeeded. Subsequent to a crash the system can restore the file system data structures to a consistent state by processing the log records first redoing the operations for the committed transactions after that undoing the operations for transactions that did not commit successfully before the crash.
The different paging techniques are 1. Multilevel paging or hierarchical paging method: In definite cases the page table may consist up to 1 million entries. This would be
BEST FIT ALGORITHM Here scanning is for the finest fit one. Signifies it searches the entire list for the best fit position. For the process therefore in that the process will
combined approaches (ULT/KLT)
Q. Why is rotational latency typically not considered in disk scheduling? How would you alter SSTF, SCAN and C-SCAN to comprise latency optimization? Answer: Most disks don't
What are threads? A thread is alike to sequential programs. Single threads have a beginning, sequence and end. At any given point in time during the runtime of the thread there
What is the basic approach of page replacement? If no frame is free is available, find one that is not presently being used and free it. A frame can be freed by writing its con
Multi-level page tables are tree-like structures to hold page tables. As an example, consider a two- level page table, again on a 32-bit architecture with 212 = 4 kbyte pages. Now,
A UNIX file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contains 10 direct entries, and one single, double, and triple indirect entry
Define deadlock. A process requests resources; if the resources are not available at that time, the process enters a wait state. Waiting processes might be never again change s
Operating Systems have evolved tremendously in the last few decades. The first approach for building Operating Systems, taken during the 40s through early 60s, was to allow only on
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