Explore the role of the Local Link Domino attribute in SRDF/Metro configurations in Dell EMC PowerMax and VMAX All Flash storage arrays. Learn how it impacts device readiness in the Dell DES-1121 certification exam context.
Table of Contents
Question
A host is connected to two PowerMax arrays with SRDF/Metro. Host I/Os cannot be delivered across the SRDF link. The devices in the SRDF group have been forced into a Not Ready state to the host. Which attribute is set on the SRDF group to cause this behavior?
A. Link Limbo Period
B. Local Auto Link Recovery
C. Update After Resume
D. Local Link Domino
Answer
D. Local Link Domino
Explanation
The attribute that causes the devices in the SRDF group to be forced into a Not Ready state to the host when a host is connected to two PowerMax arrays with SRDF/Metro and host I/Os cannot be delivered across the SRDF link is Local Link Domino.
SRDF/Metro is a feature of Dell EMC PowerMax and VMAX All Flash storage arrays that significantly changes the traditional behavior of SRDF to better support critical applications in high availability environments. In a typical SRDF/Metro setup, both the R1 and R2 devices are accessible, and the host or hosts can read and write to both R1 and R2 devices with SRDF/Metro ensuring that each copy remains current and consistent.
The Local Link Domino attribute, when set, forces the devices in the SRDF group into a Not Ready state to the host if host I/Os cannot be delivered across the SRDF link. This is a protective measure designed to prevent data inconsistency or loss in the event of a link failure.
Dell DES-1121 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Dell DES-1121 exam and earn Dell DES-1121 certification.