Topics in This Overview
- Enterprise storage fundamentals
- IBM FlashSystem overview
- Storage Area Networks (SAN)
- Fibre Channel technology
- LUN management
- RAID concepts
- NPIV and MPIO
- Snapshots and replication
- Performance optimization
- Troubleshooting storage issues
What is Enterprise Storage?
Enterprise storage systems provide centralized, high-speed storage for multiple servers. Instead of using local disks, enterprise servers access storage through SAN infrastructure, allowing better scalability, redundancy, and simplified management.
Typical Storage Architecture
IBM FlashSystem
│
Fibre Channel SAN
│
SAN Switches
│
VIOS / NPIV
│
IBM Power Server
│
AIX / Linux / IBM i
IBM FlashSystem
IBM FlashSystem is IBM's enterprise storage platform that delivers low latency, high availability, encryption, compression, snapshots, replication, and advanced data reduction technologies.
Main Features
- NVMe Flash Storage
- Thin Provisioning
- Compression
- Deduplication
- Snapshots
- FlashCopy
- Remote Replication
- High Availability
Storage Area Network (SAN)
A SAN is a dedicated high-speed network connecting servers to centralized storage. It enables multiple hosts to securely access shared storage devices with high performance.
Fibre Channel
- High-speed communication
- Low latency
- Redundant paths
- Enterprise reliability
- Supports 8G, 16G, 32G and higher speeds
Logical Unit Number (LUN)
A LUN represents a logical storage device presented from the storage system to a host. Operating systems detect these LUNs as disks that can be partitioned and formatted.
RAID Technologies
- RAID 1 - Mirroring
- RAID 5 - Striping with parity
- RAID 6 - Dual parity
- RAID 10 - Performance and redundancy
NPIV (N_Port ID Virtualization)
NPIV allows client LPARs to access SAN storage directly through virtual Fibre Channel adapters, while sharing physical Fibre Channel ports on the VIOS.
MPIO (Multipath I/O)
MPIO provides multiple redundant paths between servers and storage devices. If one path fails, I/O automatically continues through another available path, ensuring high availability.
Snapshots and Replication
- FlashCopy Snapshots
- Remote Copy
- Metro Mirror
- Global Mirror
- Disaster Recovery Replication
Common Administration Tasks
- Create storage volumes
- Map LUNs to hosts
- Monitor storage health
- Check SAN connectivity
- Verify MPIO paths
- Expand storage capacity
- Monitor performance
- Review storage events
Useful AIX Storage Commands
lspv lsvg lslv lspath cfgmgr errpt bootinfo lsattr iostat vmstat
Best Practices
- Maintain multiple SAN paths.
- Monitor storage latency.
- Keep firmware updated.
- Use redundant SAN switches.
- Regularly verify backups.
- Monitor storage capacity growth.
Learning Roadmap
Beginner
Learn disks, LUNs, SAN, Fibre Channel, and RAID concepts.
Intermediate
IBM FlashSystem administration, storage mapping, MPIO, and NPIV.
Advanced
Replication, snapshots, storage optimization, and disaster recovery.
Expert
Enterprise storage architecture, performance tuning, and production troubleshooting.
Related on AIXOSQuiz
Continue from this overview to storage guides:
Frequently Asked Questions
What is the difference between SAN and NAS?
SAN provides block-level storage over a dedicated network, while NAS provides file-level storage over standard IP networks.
Why is MPIO important?
MPIO ensures storage availability by providing multiple communication paths between the host and storage system.
What is IBM FlashSystem?
IBM FlashSystem is IBM's enterprise storage platform offering high-performance flash storage with advanced data services.
Next Steps
- IBM FlashSystem Fundamentals
- SAN Architecture
- Fibre Channel Basics
- LUN Management
- NPIV Configuration
- MPIO Administration
- Snapshots and Replication
- Performance Monitoring
- Troubleshooting Storage Issues
- Enterprise Best Practices