HP0-J73 · Question #35
Which statements are true about Network RAID implementations? (Select two)
The correct answer is A. RAID 10 in a multi-site SAN ensures that data remains available in the event that one site becomes E. Network RAID 10+2 ensures that data remains available after half of the SAN is unavailable.. Network RAID 10 in a multi-site SAN provides site-level fault tolerance, and Network RAID 10+2 can survive the loss of half the SAN nodes.
Question
Which statements are true about Network RAID implementations? (Select two)
Options
- ARAID 10 in a multi-site SAN ensures that data remains available in the event that one site becomes
- BThe best applications for using Network RAID 5 volumes include applications with mostly write,
- CNetwork RAID 10+1 is preserved in the event that three storage systems become unavailable.
- DAll volumes are protected from a reboot of a Store Virtual Cluster during a Left hand OS Firmware Upgrade.
- ENetwork RAID 10+2 ensures that data remains available after half of the SAN is unavailable.
How the community answered
(23 responses)- A83% (19)
- B4% (1)
- C9% (2)
- D4% (1)
Why each option
Network RAID 10 in a multi-site SAN provides site-level fault tolerance, and Network RAID 10+2 can survive the loss of half the SAN nodes.
Network RAID 10 mirrors data across storage systems at separate sites, so if one entire site becomes unavailable the mirrored copy at the surviving site keeps data accessible.
Network RAID 5 uses distributed parity and is optimized for read-heavy, sequential workloads - write-heavy applications suffer significant performance penalties due to the parity calculation overhead on every write.
Network RAID 10+1 tolerates the failure of only one storage system at a time, not three; losing three systems would exceed its redundancy capacity.
During a LeftHand OS firmware upgrade, volumes that lack the minimum required number of network RAID mirrors may become temporarily unavailable, so not all volumes are unconditionally protected.
Network RAID 10+2 extends mirroring with two additional parity or mirror sets, allowing the cluster to remain operational even when half of the storage systems in the SAN are simultaneously unavailable.
Concept tested: HP LeftHand Network RAID fault tolerance levels
Source: https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-c03290624
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