HP Integrity rx4640 Server - Manual (Page 5)

Hardware features 5
Hardware features
E500 model
Item ID Description
1 Connector for mini-SAS port 1E (external), 4x wide
2 Connector for mini-SAS port 2E (external), 4x wide
3 40-bit, 256-MB cache module (also known as array accelerator)
CAUTION: Do not use this controller with cache modules designed for other controller models,
because the controller can malfunction and you can lose data. Also, do not transfer this cache
module to a different controller module, because you can lose data.