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DISK PERFORMANCE For this assignment you will research the performance specifications of commonly used disks as...

DISK PERFORMANCE

For this assignment you will research the performance specifications of commonly used disks as well as the impact of configurations such as RAID etc on those performance characteristics. You will also research the common storage performance needs of server operating systems and applications and see how this compares to the performance characteristics you found for common systems. Be sure to detail how you the information you gathered would impact your decisions on implementing a disk. Highlight in your response how you think these items can be resolved and what needs to be kept in consideration when designing a virtualized system.

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Answer #1

RAID- is a redundancy system which is used for storing the data in different storage devices inorder to protect data incase of failure.

TYPES OF DISKS-

IDE-Integrated drive electronics

ATA-Advanced tech attached

SATA-serially adv tech attached

SAS-serially attached storage

FC-Fiber channel

EFD-enterprise flash disk

Common raid technologies are mirroring and striping

RAID0-Data is just written into multiple disks

-Not recommended for data protection

RAID1-Mirroring

-Data is written into two disks

-Min disks 2

-Fault tolerance 1

RAID3-Dedicated parity

even if one disk fails the data will be safe in the parity disk

-min disks-3

-fault tolerance 2

RAID5-Dedicated parity

data is written into the disks using extra parity disk

-fault tolerance 1 disk

RAID6-Dual distributed parity

-min disks required-4

- -fault tolerance -2

RAID 1+0 Mirroring and striping

min disks req-2

fault tolerance 2

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