HP ProLiant ML570 Quickspecs page 10

QuickSpecs
Standard Features
Availability Availability Availability Availability HP Advanced Memory Protection Technology HP Advanced Memory Protection Technology - delivers unsurpassed memory protection and server HP Advanced Memory Protection Technology HP Advanced Memory Protection Technology
availability with the following supported modes of operation:
Advanced ECC (1 or More Memory Boards) Advanced ECC (1 or More Memory Boards) Advanced ECC (1 or More Memory Boards) Advanced ECC (1 or More Memory Boards)
Advanced ECC Memory is the default memory protection mode for the HP ProLiant ML570 G4. In
Advanced ECC, the server is protected against correctable memory errors. The server will provide
notification if the level of correctable errors exceeds a predefined threshold rate. The server does
not fail because of correctable memory errors.
Advanced ECC provides additional protection over Standard ECC in that it is possible to correct
certain memory errors that would otherwise be uncorrectable and result in server failure. Whereas
Standard ECC can correct single-bit memory errors, Advanced ECC can correct single-bit and
multi-bit memory errors if all failed bits are on the same DRAM device on the DIMM. Advanced
ECC is the only mode in which hot-add operations are supported by adding a memory board with
memory to the server while it is running.
Online Spare Memory (1 or More Memory Boards) Online Spare Memory (1 or More Memory Boards) Online Spare Memory (1 or More Memory Boards) Online Spare Memory (1 or More Memory Boards)
Offers a higher level of memory protection than Advanced ECC alone. If the number of single-bit
correctable errors on a bank exceeds the pre-defined error threshold, that bank will fail over to the
online spare bank without intervention or server interruption. The failed memory can then be
replaced at the user's convenience during a scheduled maintenance window. Online Spare
Memory is achieved by protecting active memory with online spare memory on the same memory
board. No operating system support is required.
Hot Plug Mirrored Memory (2 or 4 Memory Boards) Hot Plug Mirrored Memory (2 or 4 Memory Boards) Hot Plug Mirrored Memory (2 or 4 Memory Boards) Hot Plug Mirrored Memory (2 or 4 Memory Boards)
Hot Plug Mirrored Memory provides a higher level of availability than Advanced ECC and Online
Spare Memory. With Hot Plug Mirrored Memory, the server is protected against uncorrectable
memory errors that would otherwise result in server failure. Hot Plug Mirrored Memory allows the
server to keep two copies of all memory data on separate memory boards. If an uncorrectable
error is encountered, the proper data is retrieved from the memory board that did not fail. In
addition, Hot Plug Mirrored Memory allows failed or degraded DIMMs to be replaced while the
server is running without requiring server downtime. The memory board with the failed DIMMs can
be removed from the front of the server, failed DIMMs replaced, and the board re-inserted into the
server without disengaging the server from the rack or interrupting the operating system.
Hot Plug RAID Memory (4 Memory Boards) Hot Plug RAID Memory (4 Memory Boards) Hot Plug RAID Memory (4 Memory Boards) Hot Plug RAID Memory (4 Memory Boards)
Hot Plug RAID Memory provides a similar level of protection as Hot Plug Mirrored Memory but
obtains this protection using a smaller percentage of the installed memory. While Hot Plug
Mirrored Memory keeps two copies of all memory data, Hot Plug RAID Memory keeps only one
copy of all memory data and additional parity information. If an uncorrectable memory error is
encountered, the server can create the proper data using data from the parity information and the
other memory boards that contain no failures. In a Hot Plug RAID Memory configuration, 75% of
the installed memory is available to the Operating System; 50% more than in a Hot Plug Mirrored
Configuration. As with Hot Plug Mirrored Memory, Hot Plug RAID Memory allows failed DIMMs to
be replaced while the server remains running and safely engaged in the rack.
Supported Modes Supported Modes Supported Modes Supported Modes
Number of DIMMs
Supported (Dual
Ranked / Single
Ranked)
Maximum Memory 16 GB / 12 GB
Supported (4GB
Dual Ranked / 2GB
SingleRanked)
DA - 12474 Worldwide — Version 28 — August 1, 2008
# of Memory Boards Installed # of Memory Boards Installed # of Memory Boards Installed # of Memory Boards Installed
1 Board 1 Board 1 Board 1 Board 2 Boards 2 Boards 2 Boards 2 Boards
4 / 6 8 / 12
32 GB / 24 GB
HP ProLiant ML570 Generation 4 (G4) HP ProLiant ML570 Generation 4 (G4) HP ProLiant ML570 Generation 4 (G4) HP ProLiant ML570 Generation 4 (G4)
3 Boards 3 Boards 3 Boards 3 Boards
12 / 18
48 GB / 36 GB
4 Boards 4 Boards 4 Boards 4 Boards
16 / 24
64 GB / 48 GB
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