SG0-001 · Question #90
Which of the following provides high availability? (Select TWO).
The correct answer is A. Multipath B. Hot spare. Multipathing and hot spares are common technologies that enhance storage high availability by providing redundant paths and automatic drive replacement, respectively.
Question
Which of the following provides high availability? (Select TWO).
Options
- AMultipath
- BHot spare
- CRAID0
- DSnapshot
- EZoneset
How the community answered
(37 responses)- A89% (33)
- C3% (1)
- E8% (3)
Why each option
Multipathing and hot spares are common technologies that enhance storage high availability by providing redundant paths and automatic drive replacement, respectively.
Multipathing provides high availability by creating multiple physical paths from a server to a storage device, ensuring that if one path fails, I/O can seamlessly continue over another path without interruption. This redundancy prevents single points of failure in the storage connectivity.
A hot spare is an unconfigured disk drive installed in a RAID array that automatically replaces a failed drive without manual intervention or system downtime. This ensures continuous operation and high availability of the data stored in the RAID array by quickly restoring redundancy after a drive failure.
RAID0 (striping) improves performance by spreading data across multiple disks but offers no data redundancy or fault tolerance, meaning a single disk failure results in complete data loss and system downtime, thus not providing high availability.
A snapshot creates a point-in-time copy of data, primarily used for data recovery or backups, but it does not inherently provide high availability for ongoing operations or protection against hardware failures.
A zoneset is a configuration in a Fibre Channel fabric that defines which devices can communicate with each other, enhancing security and management but not directly providing high availability for storage access or data.
Concept tested: Storage high availability concepts
Source: https://www.redhat.com/sysadmin/raid-levels-explained
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