IBM 81Y4559 Controller
IBM ServeRAID M5100 Series 1GB Flash / RAID 5 Upgrade (Part Number: 81Y4559) — is a performance and feature enhancement module for the M5100 series RAID controllers. This upgrade kit adds 1GB of Flash-backed cache memory, which dramatically improves I/O performance by buffering write operations. Additionally, it unlocks the RAID 5 capability, allowing users to configure parity-based redundant arrays for better storage efficiency. Unlike older battery-backed units, this flash-based module offers permanent data retention during power loss and requires zero maintenance.
Key Specifications:
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Cache Capacity: 1GB.
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RAID Levels: Unlocks RAID 5.
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Supported Controllers: ServeRAID M5110 and M5120.
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Server Compatibility: IBM System x M4 generation servers.
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Benefit: High-speed data processing and enhanced data protection.
