Product Description
IBM 42R3965 / 74Y5665 New Cache Battery
The IBM 42R3965 (cross-referenced as 74Y5665) is a new replacement cache battery pack for select IBM PCI-X and PCIe RAID disk controllers. This 3.7V Lithium-Ion battery provides backup power to the write cache memory, protecting data during power interruptions and ensuring non-volatile write caching in high-availability IBM i and Power Systems environments.
Key Features
- New, fully charged Li-Ion cache battery designed for long service life.
- Ensures data integrity for RAID write-back caching during power loss.
- Direct replacement for aging or failed batteries in supported controllers.
- Compatible with multiple adapter FRUs and feature codes.
- Maintains high RAID performance and system reliability.
Technical Specifications
| Attribute | Details |
|---|---|
| Part Numbers | 42R3965, 74Y5665 |
| Type | Cache battery pack (rechargeable Li-Ion) |
| Voltage | 3.7V |
| Primary Use | Backup power for RAID controller write cache |
| Condition | New |
Installing this new IBM cache battery restores full write cache protection on RAID adapters, preventing potential data loss and maintaining optimal I/O performance. Replacing expired batteries is critical for data integrity in production IBM i systems. As a new unit, it provides maximum recharge cycles and reliability compared to used or reconditioned batteries, helping extend the operational life of legacy RAID controllers without requiring controller replacement.
Compatibility
The IBM 42R3965 / 74Y5665 cache battery is compatible with various IBM RAID controllers and adapters, including:
- 5738, 5777, 571E (PCI-X Quad-Channel Ultra320 SCSI RAID Adapter)
- 2780, 5708, 574F, 5580, 571F, 571B, 572B (PCI-X/PCIe RAID Disk Controllers)
- Other related adapters such as 0641, 0649, 5582, 5583, and equivalents It supports IBM iSeries (System i), Power Systems (pSeries/System p), and POWER5/POWER6-era servers using these controllers for disk RAID protection. Verify the exact adapter model, FRU, and battery connector in your system before installation.
Warranty: 60 days from DataTechComputer.com.
