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HCIE-Storage study materials
HCIE-Storage study resources

HCIE-Storage: SAN, NAS and Object Service Configuration

HCIE-Storage · Work through your exam, one topic at a time.

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SAN, NAS and Object Service Configuration

Domain 2 - SAN, NAS and Object Service Configuration

This domain tests day-2 provisioning across block, file and object on OceanStor: mapping views, initiator and host-group hygiene, multipathing and ALUA, NFS and SMB export design, and S3 bucket policy.

Block services

  • A LUN becomes visible only through the full chain: LUN into LUN group, mapping view, port group. The host must exist in a host group whose initiators (WWN or iSCSI IQN) are registered.
  • ALUA: array ports report preferred and non-preferred paths. UltraPath or native MPIO must be installed so the host uses preferred paths and fails over without unnecessary ownership trespass.
  • iSCSI: keep service and management networks separate, enable CHAP where the baseline requires it, and make MTU consistent end to end - jumbo frames everywhere or 1500 everywhere.

File and object

  • NFS exports need host or subnet access control and an explicit root-squash decision; SMB shares need correct AD integration plus the signing and encryption policy your security baseline mandates.
  • Quotas, HyperSnap schedules and NDMP backups are configured per file system, and snapshot space is reserved from the pool.
  • Object access is controlled by bucket policy and access-key pairs; WORM retention is set at bucket or object level and cannot be shortened once locked.

Worked example

A Linux host with two HBAs sees no LUN. Check in order: initiator WWPNs registered and online; host object created with both WWPNs; host belongs to the host group; the LUN is in the LUN group referenced by the mapping view; the port group contains the target ports zoned to the host; the mapping view is mapped and the LUN is online. If the LUN appears twice, the host is seeing both ALUA paths without multipath - install UltraPath rather than masking one path.

Traps

Mapping one LUN to two independent hosts without a cluster file system; forgetting to re-zone when an array port is added; carrying service traffic on management ports; letting snapshots exhaust the pool because no reservation was made; mismatched iSCSI MTU causing intermittent login failures.