EMC Updated D-ISM-FN-01 Exam Questions and Answers by aminah

RAID 1isdisk mirroring. It writes identical copies of data to two disks simultaneously, providing redundancy.

Minimum of 2 disks (no parity, no striping).

Excellent read performance, write performance equivalent to a single disk.

Providesfault tolerancebecause data is duplicated.

Dell RecoverPoint is a continuous data protection (CDP) solution that uses journaling to provideany point-in-time recoveryof data. It continuously captures and replicates data changes, storing them in a journal to enable precise recovery to any required point in the past.

Dell SRDF (Symmetrix Remote Data Facility):Provides synchronous/asynchronous replication, not CDP.

Dell TimeFinder SnapVX:Creates point-in-time snapshots but doesn’t offer continuous journaling.

Dell Cloud Tier:Used for archiving older data to the cloud.

The exhibit shows a Fibre Channel (FC) switch connected to another FC switch. The port "X" is used for inter-switch link (ISL) connectivity, which is characteristic of anE_port (Expansion Port).

F_port (Fabric port):Connects an N_port (host or storage device) to a switch.

N_port (Node port):End device port in FC networks (like HBA in hosts or storage).

NL_port (Node Loop port):Used for Arbitrated Loop topologies.

E_port:Connects two FC switches together for ISL, which is exactly what's shown in the exhibit.

Sub-LUN tiering allows for the movement of data at a more granular level within a Logical Unit Number (LUN), enabling:

Granular control over data placement:Specific data blocks can be moved to appropriate storage tiers based on access patterns.

Cost optimization:Frequently accessed data resides on high-performance (and more expensive) storage, while less accessed data is moved to cost-effective storage, optimizing overall storage costs.

Other options:

Reduced need for storage capacity:Not directly impacted by sub-LUN tiering.

Reduced need for storage tiering policies:Policies are still required to manage data movement.

Simplified storage management:While sub-LUN tiering adds efficiency, it may introduce complexity in management.