A global app must keep reading storage data even during a regional outage, without waiting for Microsoft to fail over the account. Which redundancy option provides read access to the secondary region at all times?
A.LRS
LRS = one datacenter, no region protection.
B.ZRS
ZRS = zones within one region.
C.GRS
GRS secondary is offline-readable only after failover is declared.
D.RA-GRS (read-access geo-redundant storage)
RA-GRS = always-readable secondary. Correct.
Why this answer
GRS replicates to the paired region but the secondary is NOT readable until Microsoft declares failover. RA-GRS adds continuous read access to the secondary endpoint — required when apps must read through an outage without failover orchestration.
Correct answer: D · Last reviewed 2026-02-14
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