IBM 00E4385 server / storage / networking hardware Server Hardware / Parts

The IBM 00E4385 is an Enclosure Services Manager (ESM) module for the EXP24S SAS disk drive enclosure, feature code 5887, the controller card that manages drive communication, enclosure monitoring and SAS fabric switching inside the expansion drawer. EXP24S enclosures are typically fitted with a pair of ESM modules for redundancy, each providing dual SAS ports back to the host adapter so drive access survives a single module failure. The 5887 drawer is a long-serving external storage option across IBM Power Systems and mid-range server platforms, and genuine ESM replacements are a routine requirement when a module reports a fault or when building out additional storage capacity. Specifiers should confirm the drawer’s exact configuration before ordering.