Discussion
In RAID 4, the main performance bottleneck arises due to
Answer: C
The bottleneck is a single dedicated parity disk.
RAID 4 stripes data in blocks across several disks and keeps all parity on one extra disk. Reads can be spread across the data disks, but every write, to any data disk, also has to update the parity block on that one parity disk. Small random writes therefore queue up on the parity disk, which limits write throughput. RAID 5 removes the problem by rotating parity across all disks.
Disk mirroring is RAID 1 and is not used in RAID 4. Fragmentation is a file-system issue, and RAID 4 uses uniform block sizes, so those options do not describe its weakness.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development