Assignmtne 6

What is the difference between block oriented I/O devices and stream oriented I/O devices. Give an molding of each. Block-oriented device stores information in blocks that atomic number 18 usu every(prenominal)y of unyielding size, and transfers are made champion block at a time. An exemplification is USB keys. Stream-oriented device transfers information in and out as a stream of bytes, with no block structure. An example is printers. What handgrip elements are involved in a disk strike or write? A Rotational delay Briefly severalise the 7 RAID levels. RAID Level 0 is non-redundant, when info is distri howevered over completely disks in array. Data is striped dress circle robin over consecutive disks, and all information on all disks will be lost if any one disk fails. RAID Level 1 is mirrored. It happens when all the information is duplicated. The data requests can be serviced by either of couple disks and all writes must occur twice. RAID Level 2 is redundancy through Hamming code. Level 2 is a parallel access technique. All disks execute for each I/O request or synchronized. Hamming code make use of to correct single dapple and detect double phone number errors. Required fewer disks than Level 1. RAID Level 3 is bit-interleaved parity. Level 3 is a single redundant disk, no matter how large the disk array. The parallel access and data distri exclusivelyed in small strips.

check bit bit computed for bits in resembling position on all disks. RAID Level 4 - is block-level parity. In Level 4 each array operates independently. proport ion bit computed for bits in same position o! n all disks. RAID Level 5 is block-level distributed parity. Which is similar to Level 4, but parity distributed across all disks. This helps avoids the potential I/O bottleneck of the single parity disk found in Level 4. RAID Level 6 is dual redundancy. monster different parity calculations are carried out and stored in crock up blocks on different disks. Level 6 provides extremely eminent data availability. List and briefly define five devote organizations. Pile - Data are...If you want to get a massive essay, order it on our website: OrderCustomPaper.com

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