Storage And Raids Flashcards
What is the primary purpose of a storage device?
To store data and programs for later use.
What are common types of storage devices?
HDD, SSD, NVMe, optical drives, and flash drives.
What is the difference between HDD and SSD?
HDD uses spinning disks, while SSD uses flash memory for faster performance.
What is an NVMe drive?
A high-speed SSD that uses the PCIe interface.
What is the function of an optical drive?
To read and write data from optical discs like CDs, DVDs, and Blu-rays.
What is the purpose of an external storage device?
To provide portable and additional storage capacity.
What are examples of removable storage media?
USB flash drives, SD cards, and external hard drives.
What is a hybrid drive?
A storage device that combines SSD speed with HDD capacity.
What does RAID stand for?
Redundant Array of Independent (or Inexpensive) Disks.
What is the purpose of RAID?
To improve performance, redundancy, or both for storage systems.
What is RAID 0?
Data is striped across drives for better performance; no redundancy.
What is RAID 1?
Data is mirrored across drives for redundancy; no performance gain.
What is RAID 5?
Data is striped with parity across drives; offers redundancy and performance.
What is RAID 10 (1+0)?
Combines RAID 1 and RAID 0; mirroring and striping for redundancy and performance.
What is the minimum number of drives required for RAID 0?
Two drives.
What is the minimum number of drives required for RAID 1?
Two drives.
What is the minimum number of drives required for RAID 5?
Three drives.
What is the minimum number of drives required for RAID 10?
Four drives.
What is a common use case for RAID 0?
Video editing and applications requiring high performance but no redundancy.
What is a common use case for RAID 1?
Data backup and systems needing high availability.
What is a common use case for RAID 5?
Servers requiring redundancy and performance.
What is the main advantage of RAID 10?
Combines the speed of RAID 0 with the redundancy of RAID 1.
What happens if a single drive fails in RAID 0?
All data is lost since there is no redundancy.
What is the difference between hardware RAID and software RAID?
Hardware RAID uses a dedicated controller, while software RAID uses the operating system.