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24 Cards in this Set
- Front
- Back
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What is a system reboot?
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Controlled system restart.
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What is Emergency system restart?
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Uncontrolled system restart.
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What is System cold start?
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Use this when regular recovery process cannot recover the system.
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What is meant by sanitizing a disk?
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Erasing
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What is meant by clearing a disk?
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Overwriting a few times
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What is meant by purging a disk?
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Degausing and making unrecoverabe
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What is meant by zeroization of a disk?
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overwriting with a pattern
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What is meant by degausing a disk?
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magnetic scrambling
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What is meant by data remanence?
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residual physical representation of information
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What is Mean Time To Repair (MTTR)?
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Amount of time it will take to get a device fixed and back into production
May pertain to fixing component or device, replacing, or maybe vendor SLA If the MTTR is too high, redundancy should be used |
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What is Parity?
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Fault tolerance - instructions that tell the RAID system how to rebuild the lost data to a new drive
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What is Striping
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Technique of segmenting logically sequential data, such as a file, in a way that accesses of sequential segments are made to different physical storage devices
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What is mirroring?
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Replication of logical disk volumes onto separate physical hard disks in real time to ensure continuous availability.
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What is hamming?
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Error correction
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What is RAID 0?
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Block-level striping without parity or mirroring. Used for performance
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What is RAID 1?
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Mirroring without parity or striping
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What is RAID 2?
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39 disks.
Bit-level striping with dedicated Hamming-code parity. |
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What is RAID 3?
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Byte-level striping with dedicated parity.
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What is RAID 4?
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Block-level striping with dedicated parity.
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What is RAID 5?
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Stripe all of drives
Interleave parity |
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What is Clustering?
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Fault tolerant server technology that is similar to redundant servers except each server takes part in processing services that are requested.
Group of servers viewed logically as a single logical system Multiple servers managed as a whole |
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What is Full Backup?
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All data backed up and saved to storage media
Archive bit is cleared or set to 0 Back up and restore take a long time |
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What is Differential Backup?
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Backs up files that have been modified since last full backup
Does not change the archive bit |
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What is Incremental Backup?
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Backs up files that have changed since the last full or incremental backup
Sets archive bit to 0 |
