Question 1

A company wants to implement a three-site disaster recovery solution. It is considering a Concurrent SRDF/Star environment where the production data on R11 devices are replicated to two R2 devices in two remote arrays. Site 2 will use SRDF/S links, and Site 3 will use SRDF/A links from Site 1.

What is the correct configuration for recovery links?

ASRDF/S links must be configured between Site 3 and Site 2

BSRDF/S links must be configured between Site 1 and Site 3

CSRDF/A links must be configured between Site 3 and Site 2

DSRDF/A links must be configured between Site 1 and Site 2

Answer : A

In a Concurrent SRDF/Star environment where the production data on R11 devices are replicated to two R2 devices in two remote arrays, SRDF/S links must be configured between Site 3 and Site 2. This is because in a Concurrent SRDF/Star configuration, there are two target sites and one source site.If there's a failure, the source site can switch to either of the target sites based on the business continuity plan1.Reference:Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide,SRDF Star software uses and best practices - Dell

Question 2

An application server has the following data characteristics:

80% of the I/O is generated with 8 KB random small blocks

20% of the I/O is generated with 64 KB sequential large blocks

50% of all I/O is a write

What workload profile do these data characteristics represent?

ARWM

BRRH

CDCS

DOLTP

Answer : D

The data characteristics represent an Online Transaction Processing (OLTP) workload profile.OLTP workloads typically consist of a high percentage of small, random I/O operations2.In this case, 80% of the I/O is generated with 8 KB random small blocks, which is characteristic of OLTP workloads2.Reference:Use DISKSPD to test workload storage performance - Azure Stack HCI | Microsoft Learn

Question 3

A storage administrator migrated an AIX host using NDM.

When they commit the migration, how is host access to the source array removed?

ASource volumes are set NR

BMasking view is deleted

COld host paths are set NR

DSource volumes are deleted

Answer : B

During a Non-Disruptive Migration (NDM), when the migration is committed, the host access to the source array is removed by deleting the masking view. The masking view is a logical grouping of host initiators, storage ports, and a storage group (which contains volumes).Deleting the masking view removes the host's access to the volumes on the source array12.Reference:Dell EMC PowerMax and VMAX: Non-Disruptive Migration Best Practices and Operational Guide,VMAX/PowerMax Non-Disruptive Migration (NDM) for the IBMi host platform | Dell US Support Knowledge Base Article

Question 4

An administrator implemented SYMACLs on a PowerMax using host-based Access IDs. The administrator is no longer able to run SYMCLI commands against the volumes belonging to a host.

What is a possible reason for this issue?

AThe disks the volumes were on were replaced

BHost network interface card was replaced

CSYMAPI options file was manually modified with the wrong host ID.

Dsymacl ---unique ---passphrase was run using a different passphrase

Answer : C

If an administrator implemented SYMACLs on a PowerMax using host-based Access IDs and is no longer able to run SYMCLI commands against the volumes belonging to a host, one possible reason could be that the SYMAPI options file was manually modified with the wrong host ID. The SYMAPI options file contains configuration settings for Solutions Enabler, including host IDs for access control.If this file is incorrectly modified, it could prevent the administrator from running SYMCLI commands against certain volumes34.Reference:Dell EMC PowerMax and VMAX All Flash: Embedded Management,Role Based Access Control on PowerMax -- Storage Intelligence

Question 5

An organization has PowerMax systems on three sites. They plan to implement SRDF/Star to provide remote protection.

What is a restriction for an SRDF/Star configuration?

AThe asynchronous PowerMax requires twice the SRDF directors compared to the two synchronous arrays

BAll the SRDF Groups must be defined and in suspended state

CSRDF Groups cannot be shared between SRDF/Star configurations

DAll SRDF/Star device pairs must be of the same geometry and size