RAID Characteristics and Storage Flashcards
Remember RAID Characteristics
Name all RAID Configurations
RAID 0
RAID 1
RAID 10
RAID 5
RAID 0 (Disk Stripping)
Min. Drives?
How is data stored?
Redundancy?
Performance?
2 or More Drives
Data is Split
No Redundancy
Fast Performance
RAID 1 (Disk Mirroring)
Min. Drives?
How is data stored?
Redundancy?
Performance?
2 or More Drives
Drives are mirrored
Full Redundancy
Slow Performance
RAID 10 (Disk Stripping & Mirroring)
Min. Drives?
How is data stored?
Redundancy?
Performance?
4 or More Drives (Must be even)
1 Set is RAID 0 / 1 set is RAID 1
Full Redundancy
Fast Performance
RAID 5 (Parity)
Min. Drives?
How is data stored?
Redundancy?
Performance?
- 3 or More Drives
- In Parity across all drives
- Full Redundancy (Only if ONE drive fails)
- Faster than RAID 1, but less storage than RAID 10. Slow Performance until failed drive is replaced
What is the maximum RPM value available in modern HDDs?
15,000 RPM (15K)
What are the common form factors for HDD in…
- Laptops
- Desktops
- 2.5 Inch
- 3.5 Inch
Name 2 interfaces used by SSDs
- NVMe (PCIe)
- SATA
Name 2 form factors used by SSDs
- M.2
- mSATA
What form factor has superseded the M.2 form factor?
mSATA
What are 5 known flash memory card formats?
- SD
- CompactFlash
- microSD
- miniSD
- xD (Old)
Describe Low-Level Format
Recreates sectors & tracks on a disk, and restores disk to original state.
Often completed at factory.
Describe High-Level Format
The process of setting up an empty file system on a disk partition or a logical volume and then installing a boot sector.
Often referred to as Quick or Standard formatting.
What state of the HDD LED light typically indicates the drive’s normal operation?
Intermittent Flashing
What metric might be of help in diagnosing the declining performance of a storage drive?
IOPS
(Input/Output Operations per Second)
