Exam 11: Mass-Storage Structure

A) the bit corruption is limited to the data portion of the sector/page.
B) the bit corruption hasn't occurred in the ECC of the sector/page.
C) the bit corruption hasn't occurred in the ECC or the header of the sector/page.
D) number of bits corrupted is low irrespective of where the corruption occurs in the sector/page.

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ZFS maintains checksums of all...

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One approach to managing bad blocks is s...

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A) 128 TB.
B) 32 TB.
C) 32 GB.
D) 128 GB.

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The C-SCAN algorithm is a variant of SCA...

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A) sector sparing uses spare sectors while sector slipping does not.
B) sector sparing results in copying of a single sector while sector slipping may result in copying of multiple sectors.
C) sector sparing can help recover from hard errors while sector slipping cannot.
D) sector slipping can help recover from hard errors while sector sparing cannot.

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Performance of a scheduling algorithm de...

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A) both higher throughput and lower latency.
B) higher throughput, but higher latency.
C) lower latency, but lower throughput.
D) neither higher throughput and lower latency.

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A) Cloud storage is accessed like a file system while NAS is API based.
B) In an event of temporary network disconnection, an application using NAS will typically hang while an application using cloud storage will typically pause.
C) Cloud storage is typically accessed over a LAN while NAS is accessed over a WAN.
D) All of the above.

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FCFS can cause the disk head to move wil...

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A) services the request with the minimum seek time
B) services the request next to the current head position in the direction of the head movement
C) chooses to service the request furthest from the current head position
D) services the request next to the current head position in the opposite direction of the head movement

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If the rotation speed of a disk is to re...

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A) 87 - 90 - 99 - 67 - 19 - 11 - 150 - 210
B) 210 - 67 - 11 - 99 - 87 - 90 - 19 - 150
C) 90 - 99 - 150 - 210 - 11 - 19 - 67 - 87
D) 90 - 99 - 150 - 210 - 87 - 67 - 19 - 11

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A) Device manufacturers store the initial file-system data structures in the device.
B) Operating system can create multiple partitions with in a single device.
C) Volume creation is implicit when a file system is placed directly within a partition.
D) Not every partition contains a copy of the operating systems.

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A) translates user data to a format that can be written on the NVM.
B) tracks which physical block contains the most number of consecutive invalid pages.
C) tracks which physical block contains only valid pages.
D) tracks which physical block contains only invalid pages.

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A) merge adjacent read requests but not adjacent write requests.
B) merge adjacent write requests but not adjacent read requests.
C) merge all adjacent I/O requests.
D) do not merge requests at all.

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