Huawei HCIP-Storage flashcards
Huawei HCIP-Storage · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- RAID 5 capacity
- Usable capacity equals the number of data drives multiplied by the smallest drive capacity: (N − 1) × capacity. One drive failure is tolerated without data loss.
- RAID-TP
- A Huawei RAID scheme that tolerates three simultaneous drive failures. It is commonly used with high-capacity NL-SAS drives to reduce rebuild risk.
- RAID 2.0+ rebuild
- Huawei RAID 2.0+ divides drives into chunks and rebuilds only used extents across many drives, shortening rebuild time compared with traditional RAID.
- Thin provisioning
- A capacity method that allocates physical storage only when data is written. Mapped logical capacity can exceed physical capacity, so subscription and free space need monitoring.
- Write-back cache
- A cache policy that acknowledges writes after they reach mirrored cache with power protection. It lowers write latency but requires cache mirroring and battery or capacitor backup.
- SAN versus NAS
- SAN exports block LUNs over FC or iSCSI and is seen as a local disk. NAS exports file shares over NFS or SMB and is mounted as a network filesystem.
- LUN alignment
- Aligning partitions and filesystems to 4 KB boundaries prevents partial-stripe writes and read-modify-write overhead on RAID arrays.
- OceanStor Dorado
- Huawei's all-flash block storage family, positioned for low-latency databases and virtualized workloads that need high IOPS and consistent response times.
- OceanStor 18000
- Huawei's high-end hybrid block storage series for mission-critical workloads, providing large cache, high availability, and high-end connectivity options.
- OceanStor Pacific
- A scale-out distributed storage family for file, object, and HPC or analytics workloads, designed to scale capacity and performance by adding nodes.
- OceanStor 9000
- A scale-out NAS platform for large file sharing, media, and archive workloads. It distributes data across nodes and supports NFS and SMB access.
- OceanProtect
- Huawei's dedicated backup storage family. It provides backup appliances and features such as ransomware detection, WORM, and air-gap protection.
- SmartTier
- An OceanStor feature that migrates hot extents to high-performance tiers and cold extents to capacity tiers according to policies and I/O statistics.
- DeviceManager
- The per-array OceanStor GUI for configuration, alarm monitoring, performance views, and log collection. It manages one storage system at a time.
- F_port
- A Fibre Channel fabric switch port that connects to a node port. It participates in fabric login and zoning.
- WWN zoning
- A Fibre Channel zone defined by worldwide port names. It controls which initiators can see which targets regardless of physical switch port.
- iSCSI port 3260
- The default TCP port used by iSCSI targets. Firewalls and network ACLs must permit it between initiators and target portals.
- CHAP
- Challenge Handshake Authentication Protocol used by iSCSI to verify initiator or target identity. Mutual CHAP authenticates both ends.
- UltraPath
- Huawei host multipath software for OceanStor block arrays. It aggregates multiple paths, balances I/O, and fails over when a path fails.
- LUN masking
- Mapping a LUN to a specific host or host group so that only permitted initiators can discover and access it.
- RPO
- Recovery point objective: the maximum acceptable amount of data loss measured in time. A 15-minute RPO permits losing up to 15 minutes of writes.
- RTO
- Recovery time objective: the maximum acceptable downtime after a failure. It drives the choice of HA, replication, and backup recovery methods.
- HyperSnap
- An OceanStor snapshot feature that creates a point-in-time logical image of a LUN or file system with little initial capacity consumption.
- HyperMetro
- Huawei active-active replication for local or metro distances. Both arrays serve I/O, and a quorum server resolves split-brain.
- 3-2-1 rule
- Keep at least three copies of data, on two different media types, with one copy stored offsite. It reduces risk from media failure and site disasters.
- Synthetic full backup
- A backup method that builds a new full image from the last full plus subsequent incremental backups, avoiding a full re-read of production data.
- eSight
- Huawei's unified management platform for storage and network devices. It provides topology, alarms, performance reports, and multi-device operations.
- SmartKit
- A Huawei toolkit for health checks, upgrade preparation, configuration collection, and log gathering on OceanStor storage systems.
- Critical alarm
- The highest Huawei alarm severity. It indicates a service-impacting fault, such as a failed controller or inaccessible LUN, requiring immediate action.
- Cache hit ratio
- The percentage of read requests served from cache. A falling ratio can indicate cache pressure, poor locality, or increased backend load.
- Queue depth
- The number of I/O requests outstanding at a port, LUN, or array. Excessive depth raises latency; very low depth may leave performance unused.
- Log collection
- Gathering array logs through DeviceManager or SmartKit before rebooting or replacing parts. Logs preserve event order for root-cause analysis.