Dell DCA-ISM study plan

Define the five core information storage building blocks (host, connectivity, storage, fabric, management) and write a one-paragraph description of each in your own words

Distinguish block, file, and object storage by access method, typical workload, and metadata model, and build a comparison table with at least four rows

Trace a write I/O path from application through file system, volume manager, HBA, fabric, and array cache to physical media, annotating each layer's role

Explain the data center evolution from dedicated silos to converged and hyperconverged infrastructure, listing three drivers for each shift

Identify the components of an intelligent storage system (controllers, cache, front-end and back-end ports, LUN masking) and describe the function of each

Compare RAID 0, 1, 5, 6, and 10 on minimum disks, usable capacity, fault tolerance, read/write penalty, and rebuild behavior, and fill in a decision matrix

Calculate usable capacity and IOPS for a given disk count and RAID level, showing your arithmetic for at least three worked examples

Describe how array cache, write-back versus write-through policy, and cache mirroring affect data integrity during a controller failure

Explain LUN masking, zoning, and port login steps in FC SAN and state which layer enforces which control

List the differences between FC SAN, iSCSI, and NAS in transport, typical latency, and best-fit workloads

Describe FC topology options (point-to-point, arbitrated loop, switched fabric) and the role of the name server and fabric services

Explain WWN, NPIV, zoning types, and the difference between hard and soft zoning with a concrete failure scenario for each

Trace an iSCSI session from initiator to target, covering discovery, CHAP authentication, and the role of the portal group

Compare NFS and SMB/CIFS semantics and describe how NAS appliances handle file locking and permissions

Diagram an IP SAN with two separate VLANs and justify the design choices for throughput and fault isolation

Explain object storage fundamentals: buckets, objects, keys, eventual consistency, and the REST/HTTP access model

Compare unified storage (block plus file plus object on one platform) with purpose-built arrays and list three trade-offs

Define RPO and RTO and map backup, snapshot, and replication technologies to each objective

Describe backup methods (full, incremental, differential, synthetic full) and match each to a recovery scenario

Explain synchronous versus asynchronous replication in terms of distance, latency, and data loss exposure

Design a three-site disaster recovery topology and justify the role of each site (production, hot standby, vault)

Describe replication consistency groups and the consequences of breaking a consistency group during failover

List the primary threats to stored data (ransomware, insider misuse, media failure, site loss) and match each to at least one control

Explain encryption at rest and in flight, key management, and the difference between array-based and host-based encryption

Describe role-based access control, audit logging, and secure multi-tenancy in a shared storage environment

Describe the SNMP, SMI-S, and REST API management interfaces and state one use case for each

Explain the metrics that matter for storage health: latency, IOPS, throughput, queue depth, cache hit ratio, and port utilization

Interpret a simple performance scenario where latency rises while IOPS stays flat, and list three plausible causes

Describe capacity planning and chargeback/showback models and how thin provisioning affects reported utilization

Explain how event correlation and alert thresholds reduce false positives in monitoring

Define cloud service and deployment models and map each to a storage use case

Compare object, block, and file cloud storage services on durability, access pattern, and cost model

Explain cloud tiering, data migration to cloud, and the role of a gateway appliance

Describe the shared responsibility model and how it changes the security controls you own versus the provider's

Explain how cloud storage supports backup and DR targets, including cost and restore-time trade-offs

Explain software-defined storage architecture and how it decouples the control plane from the data plane

Describe how AI and ML training pipelines consume storage (high concurrency, large sequential reads, checkpoint writes) and what that demands of the array

Compare NVMe over Fabrics with legacy SCSI transports on queue depth, latency, and CPU overhead

Review all nine domains and list every concept you cannot yet explain in one sentence without notes

Re-drill the gaps from the review list until each item is answered correctly twice in a row