RAID 10 (a stripe of mirrors) offers excellent write performance and fault tolerance for a single drive failure (and often more, depending on which drives fail). It is commonly recommended for database logs and other write-intensive workloads where both performance and redundancy are critical. RAID 5 has good read performance but slower writes due to parity calculation. RAID 0 offers no fault tolerance, and RAID 6 has higher fault tolerance but even slower write performance than RAID 5 due to dual parity.

Consistently high cache utilization is a warning sign that requires investigation. The first step is to understand the “why” by analyzing I/O patterns, workload characteristics, and cache hit ratios. Blindly adding hardware or changing configurations without diagnosis can be costly or ineffective. It might be a normal pattern for the workload, or it could indicate a need for optimization, more cache, or a different tiering strategy.

The description is accurate. SmartThin (thin provisioning) addresses capacity efficiency by allowing over-subscription and allocating physical space only when data is written. SmartTier (auto-tiering) addresses performance efficiency by monitoring data heat and migrating hot data to faster media (like SSDs) and cold data to slower, high-capacity media (like HDDs).

SmartCache uses SSD cache to accelerate read-intensive operations. For VDI boot storms, where many identical virtual desktops read similar operating system files simultaneously, SmartCache can serve these repeated read requests from the high-speed SSD cache, dramatically reducing load on the backend disks and improving login times. SmartDedupe reduces capacity for duplicate data but doesn’t directly accelerate reads in the same way. SmartQoS manages performance limits, and SmartThin manages space allocation.

In a HyperMetro active-active configuration, both arrays can process writes simultaneously. The arbitration server’s critical role is to determine the correct sequence of writes in case of a split-brain scenario (where the two arrays lose communication with each other). It ensures write-order consistency is preserved, which is essential for data integrity and recoverability when the link between data centers fails.

FlashLink’s core innovations include a global wear-leveling algorithm. Unlike local wear-leveling within a single SSD, global wear-leveling works across all SSDs in the entire storage pool. This distributes write and erase cycles evenly, preventing any single SSD from wearing out prematurely, thus extending the overall lifespan and reliability of the all-flash array.

The fundamental difference is in purpose and scope. A remote replication pair (like HyperReplication) is designed for disaster recovery, continuously copying data from a source LUN to a remote target LUN, either synchronously or asynchronously. A clone (like HyperClone) is a local replication technology that creates a full, point-in-time copy of a source LUN on the same array, typically used for testing, analysis, or local backups.

Storage-side latency often originates at the physical disks. The first step is to check the performance metrics of the storage pool containing the LUN. High disk utilization, long service times, or queue lengths indicate the backend disks are a bottleneck. Investigating this first can quickly confirm or rule out the storage medium as the root cause before moving to more complex SAN or host configuration checks.

HyperSnap is Huawei’s snapshot technology. Its core advantage is speed and efficiency. It can create a point-in-time copy of a LUN or file system in seconds, with minimal performance impact on the production workload. When integrated with application agents (like for Oracle, SQL Server), it can ensure the snapshot is application-consistent, making it ideal for fast, frequent backups and other data protection workflows.

RAID 10 (a stripe of mirrors) offers excellent write performance and fault tolerance for a single drive failure (and often more, depending on which drives fail). It is commonly recommended for database logs and other write-intensive workloads where both performance and redundancy are critical. RAID 5 has good read performance but slower writes due to parity calculation. RAID 0 offers no fault tolerance, and RAID 6 has higher fault tolerance but even slower write performance than RAID 5 due to dual parity.0