Hitachi VSP E990 Upgrade Guide
Maximize the performance and lifespan of your Hitachi VSP E990 (VSP-E). Every upgrade option below is verified compatible.
Verified Specifications
| Processor Options | Dual active/active controllers, 4U controller tray; 5.8M IOPS, 30 GB/s bandwidth, read latency as low as 64 microseconds |
| Memory Configuration | Max cache 1,024 GiB (global cache shared across both controllers) |
| Drive Configurations | All-NVMe: max 96x 2.5in NVMe SSD incl. spares (1.9/3.8/7.6/15TB options) via up to 4x 2U 24-NVMe expansion trays; max raw internal 1.444PB (15TB NVMe SSD), external virtualized 287PB; back-end 64x NVMe links; no internal drive slots in controller tray |
| Power Supply Options | Redundant power supplies per 4U controller tray (165 lbs/75 kg) |
| RAID Controllers | RAID-6 (6D+2P, 12D+2P, 14D+2P), RAID-5 (3D+1P, 4D+1P, 6D+1P, 7D+1P), RAID-1 (2D+2D, 4D+4D) |
| Networking Options | Max host ports 80x Fibre Channel, 40x iSCSI; interfaces FC 16/32Gb, iSCSI 10Gb; optional 2U controller host I/O expansion tray (max 1); fibre bandwidth to host 204,800 MB/s |
| Specification Source | Hitachi official documentation (verified 2026-07-02) |
Upgrade Power & Cooling
This category provides verified compatible upgrade paths. ICD engineers validate every part for compatibility with your specific server model and workload requirements.
3276081-A Hds AMS2000 Dae Power Supply
3276255-A Hds AMS2500 Power Supply Unit
3276374-A Hds AMS2000 Fan Assembly
3285122-A Hds Hus 110/130 AC Power Supply
3285131-A Hds Hus Fan Module
3285165-A Hds Hus Power Unit for Cbl
Upgrade Storage
Moving from spinning disk to SSD or NVMe storage provides the largest single performance improvement — often 10-50x faster I/O. Consider NVMe for boot drives and high-IOPS workloads.
0B22187 Hitachi 146GB 15K SAS Hard Drive Sun 390 0371
0B28473 Hitachi 1 2TB 10K SAS 2 5IN SFF Hard Drive W Bracket
3276138-A Hitachi Data Systems AMS 146 Gb 15K RPM SAS Hdd, 3
3276139-E Hitachi Data Systems AMS 3 Tb 7
3282279-A Hitachi - AMS 2TB 7
3282390 Hitachi E Hard Drive 1 2TB 10K SAS 2 5IN W Bracket
Upgrade Controllers
Upgrading your RAID controller enables faster disk I/O, larger cache, and support for newer drive technologies. Essential when adding NVMe or SAS-4 drives.
3276159-A Hds AMS2000 Dae Control Unit
3282247-A Hds AMS2300 Controller Unit Rkem
3282248-A Hds AMS2100 Controller 8GB FC
3282249-A Hds AMS2500 Controller 8GB
3285140-A Hds Hus 130 Drive Box Frame SFF
3285153-A Hds Hus FC 8G Host I/O Module
Upgrade Memory
Memory is the most impactful upgrade for virtualization and database workloads. Upgrading from 64GB to 128GB or 256GB can dramatically improve VM density and application response times.
3276125-J Hds AMS 4GB Cache Memory Module
3285126-A Hds Hus 8GB Cache Memory
3289043-A Hitachi VSP G400/G600 128GB Cache Flash Memory Module DW-F800-BM20
5541840-A VSP Cpc Cache Memory Adapter
5541842-A VSP 16GB Cache Memory Module
5541843-A VSP 8GB Cache Memory Module
More Hitachi VSP E990 Resources
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