HP ProLiant DL380p HP ProLiant DL380p Gen8 Server User Guide - Page 50

For the latest supported memory information, see the QuickSpecs on the HP website (http://h18000.www1.hp.com/products/quickspecs/ProductBulletin.html). At the website, choose the geographic region, and then locate the product by name or product category. Memory configurations To optimize server availability, the server supports the following AMP modes: • Advanced ECC-provides up to 4-bit error correction and enhanced performance over Lockstep mode. This mode is the default option for this server. • Online spare memory-provides protection against failing or degraded DIMMs. Certain memory is reserved as spare, and automatic failover to spare memory occurs when the system detects a DIMM that is degrading. This allows DIMMs that have a higher probability of receiving an uncorrectable memory error (which would result in system downtime) to be removed from operation. Advanced Memory Protection options are configured in RBSU. If the requested AMP mode is not supported by the installed DIMM configuration, the server boots in Advanced ECC mode. For more information, see "HP ROM-Based Setup Utility (on page 95)." The server also can operate in independent channel mode or combined channel mode (lockstep). When running in lockstep mode, you gain reliability in one of two ways: • If running with UDIMMs (built with x8 DRAM devices), the system can survive a complete DRAM failure (SDDC). In independent channel mode, this failure would be an uncorrectable error. • If running with RDIMM (built with x4 DRAM devices), the system can survive the complete failure of two DRAM devices (DDDC). Running in independent mode, the server can only survive the complete failure of a single DRAM device (SDDC). Maximum capacity DIMM type RDIMM RDIMM LRDIMM UDIMM UDIMM DIMM rank Single-rank Dual-rank Quad-rank Single-rank Dual-rank One processor 96 GB 192 GB 384 GB 32 GB 64 GB Two processors 192 GB 384 GB 768 GB 64 GB 128 GB For the latest memory configuration information, see the QuickSpecs on the HP website (http://www.hp.com). Advanced ECC memory configuration Advanced ECC memory is the default memory protection mode for this server. Standard ECC can correct single-bit memory errors and detect multi-bit memory errors. When multi-bit errors are detected using Standard ECC, the error is signaled to the server and causes the server to halt. Advanced ECC protects the server against some multi-bit memory errors. Advanced ECC can correct both single-bit memory errors and 4-bit memory errors if all failed bits are on the same DRAM device on the DIMM. Advanced ECC provides additional protection over Standard ECC because it is possible to correct certain memory errors that would otherwise be uncorrected and result in a server failure. Using HP Advanced Memory Error Detection technology, the server provides notification when a DIMM is degrading and has a higher probability of uncorrectable memory error. Hardware options installation 50