HP ProLiant ML350 G4p Server - Frequently Asked Questions

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HP ProLiant ML350 G4p Server - Frequently Asked Questions Where to locate detailed information on the ML350 G4p specifications and supported options? Does the ML350 G4p come in tower models only? Are there any features of the ML350 G4 that are not included on the ML350 G4p? Does HP offer solutions for racking the ProLiant ML350 G4p in Telco and Third Party Racks? How does cache size affect processor performance? What is EM64T? Does the ML350 G4p support interleaved memory? Do all models of the ML350 G4p support U320 SCSI, SATA, or SAS hard drives? How can a single drive cage support both SATA and SAS? What are the product specific options that are available for the new ProLiant ML350 G4p server? How does USB compare to floppy? Can the front USB port on the ML350 be used for floppy replacement? Does the second serial port option require connection through an I/O slot? How does the new ML350 redundant system fan work? Where to locate detailed information on the ML350 G4p specifications and supported options? The ML350 G4p QuickSpecs include descriptions of all models of the ProLiant ML350 G4p and an extensive list of supported options from HP ( Click here to view the ProLiant ML350 G4p Quickspecs ). top Does the ML350 G4p come in tower models only? Both rack and tower models are available for the ProLiant ML350 G4p. In addition, a tower-to-rack conversion kit is available that provides a true rack conversion (5U) for ProLiant ML350 G4 and G4p tower models. top Are there any features of the ML350 G4 that are not included on the ML350 G4p? The ML350 G4p is a fourth generation ML350; it uses the same chassis and chipset as the ML350 G4. It also supports most of the G4 options. The G4p system board, however, includes support for DDR2 memory, 6 memory modules, Integrated Lights-Out management, and Serial ATA. The only feature included on the G4 that does not appear on the G4p is a second rear USB port. The G4p has one front and one rear USB port; the G4 includes one front and two rear USB ports. Note that the following features included on the ML350 G3 are not available for the fourth generation ML350 servers (G4 and G4p): The ML350 G4 and G4p do not include support for 33MHz PCI cards keyed for 5V signaling only. The ML350 G4 and G4p do not support Ultra 3 Smart Array controllers (Smart Array 532 and 5300 Series). The ML350 G4 and G4p do not support Windows NT 4.0 The ML350 G3 supported optional interleaving. Optional interleaving made it possible to populate memory in any configuration. Architecture changes in the ML350 G4 and G4p require that memory be populated in identical pairs whenever more than one DIMM is installed. top Does HP offer solutions for racking the ProLiant ML350 G4p in Telco and Third Party Racks? Yes, the ML350 G4 and G4p rack models and rack conversion kits support any square or round hole rack from 24"-35" deep. Installation into Telco racks requires a 3rd party option kit from Rack Solutions ( Click here for more information on "Rack Solutions" ). top How does cache size affect processor performance? When evaluating the performance of a processor, it is essential to consider both the processor speed and cache size. The ML350 G4p includes Xeon processors with 2 MB level 2 cache. Cache is memory on the processor chip itself that allows frequently accessed data to be available to the processors with less waiting. A large cache provides faster response times, support for more users, and enhanced scalability. top What is EM64T? Intel Extended Memory 64 Technology (EM64T) extends IA-32 computing to 64-bit. 64-bit extension technology enhances next generation IA-32 server platforms with 64-bit addressability & related instructions ( Click here for additional information on Intel Extended Memory 64 Technology (EM64T) )¹. top Does the ML350 G4p support interleaved memory? Yes. Unlike the ML350 G3, memory in the ML 350 G4 and G4p must be populated in identical pairs (interleaved) whenever more than one DIMM is installed. top Do all models of the ML350 G4p support U320 SCSI, SATA, or SAS hard drives? No. When selecting an ML350 G4p model, choose a SCSI model for U320 support and SATA/SAS model for serial hard drive support. U320 SCSI is a parallel drive architecture; the U320 hard drives share a bus when communicating with the server system. SATA and SAS use serial communication. Each SATA or SAS drive communicates with the system via its own, point-to-point connection. Due to this substantial difference in architecture, serial drives require a different drive cage and different cables. top How can a single drive cage support both SATA and SAS? A key advantage of serial drive architecture is the deployment flexibility it provides. SAS specifications include support for both SATA and SAS so that one design can accommodate both low cost bulk storage (SATA) and high performance SAS. Note that support for mixed SAS/SATA configurations requires a SAS drive controller. Availability of the ML350 G4p may precede availability of SAS hard drives and controllers. Configurations that include SATA drives only can utilize a SATA RAID controller. top What are the product specific options that are available for the new ProLiant ML350 G4p server? For a complete list of supported options, including product specific options, please review the ML350 G4p QuickSpecs ( Click here to view the ProLiant ML350 G4p Quickspecs ). top How does USB compare to floppy? USB 2.0 offers a fast interface for low speed peripheral devices - including storage devices. USB drive keys support large data capacities. Available capacities on USB disk keys can support anywhere from 16 to 300 times more capacity than a 1.44 MB floppy disk. top Can the front USB port on the ML350 be used for floppy replacement? Utilities are now available that allow the use of USB drive keys instead of floppy for a number of tasks, including system boot from USB drive key ( Click here for information on "HP Drive Key Boot Utility" )². top Does the second serial port option require connection through an I/O slot? No. The second serial port option connects to a header on the system board and extends at the back of the server through an I/O knockout. top How does the new ML350 redundant system fan work? When installed, the redundant system fan runs in parallel with the standard fan. In the event of a system fan failure, the redundant system fan will provide cooling to the system. Downtime will need to be scheduled to replace the failed fan and re-establish the server's redundant fan mode. top Note 1: One or more of the links above will take you outside the Hewlett-Packard Web site. HP does not control and is not responsible for information outside of the HP Web site. Note 2: Adobe Acrobat Reader software needs to be installed to view the PDF file. Download and install Adobe Acrobat Reader software from the following URL: http://www.adobe.com/products/acrobat/readstep2.html . ©Copyright 2025 Hewlett Packard Enterprise Development LP Hewlett Packard Enterprise Development shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HPE nor its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett Packard Enterprise Development and the names of Hewlett Packard Enterprise Development products referenced herein are trademarks of Hewlett Packard Enterprise Development in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners.

Where to locate detailed information on the ML350 G4p specifications and supported options?

Does the ML350 G4p come in tower models only?

Are there any features of the ML350 G4 that are not included on the ML350 G4p?

Does HP offer solutions for racking the ProLiant ML350 G4p in Telco and Third Party Racks?

How does cache size affect processor performance?

What is EM64T?

Does the ML350 G4p support interleaved memory?

Do all models of the ML350 G4p support U320 SCSI, SATA, or SAS hard drives?

How can a single drive cage support both SATA and SAS?

What are the product specific options that are available for the new ProLiant ML350 G4p server?

How does USB compare to floppy?

Can the front USB port on the ML350 be used for floppy replacement?

Does the second serial port option require connection through an I/O slot?

How does the new ML350 redundant system fan work?

Where to locate detailed information on the ML350 G4p specifications and supported options?

The ML350 G4p QuickSpecs include descriptions of all models of the ProLiant ML350 G4p and an extensive list of supported options from HP ( Click here to view the ProLiant ML350 G4p Quickspecs ).

top

Does the ML350 G4p come in tower models only?

Both rack and tower models are available for the ProLiant ML350 G4p. In addition, a tower-to-rack conversion kit is available that provides a true rack conversion (5U) for ProLiant ML350 G4 and G4p tower models.

top

Are there any features of the ML350 G4 that are not included on the ML350 G4p?

The ML350 G4p is a fourth generation ML350; it uses the same chassis and chipset as the ML350 G4. It also supports most of the G4 options. The G4p system board, however, includes support for DDR2 memory, 6 memory modules, Integrated Lights-Out management, and Serial ATA. The only feature included on the G4 that does not appear on the G4p is a second rear USB port. The G4p has one front and one rear USB port; the G4 includes one front and two rear USB ports.

Note that the following features included on the ML350 G3 are not available for the fourth generation ML350 servers (G4 and G4p):

The ML350 G4 and G4p do not include support for 33MHz PCI cards keyed for 5V signaling only.
The ML350 G4 and G4p do not support Ultra 3 Smart Array controllers (Smart Array 532 and 5300 Series).
The ML350 G4 and G4p do not support Windows NT 4.0
The ML350 G3 supported optional interleaving. Optional interleaving made it possible to populate memory in any configuration. Architecture changes in the ML350 G4 and G4p require that memory be populated in identical pairs whenever more than one DIMM is installed.

top

Does HP offer solutions for racking the ProLiant ML350 G4p in Telco and Third Party Racks?

Yes, the ML350 G4 and G4p rack models and rack conversion kits support any square or round hole rack from 24"-35" deep. Installation into Telco racks requires a 3rd party option kit from Rack Solutions ( Click here for more information on "Rack Solutions" Non-HPE site ).

top

How does cache size affect processor performance?

When evaluating the performance of a processor, it is essential to consider both the processor speed and cache size. The ML350 G4p includes Xeon processors with 2 MB level 2 cache. Cache is memory on the processor chip itself that allows frequently accessed data to be available to the processors with less waiting. A large cache provides faster response times, support for more users, and enhanced scalability.

top

What is EM64T?

Intel Extended Memory 64 Technology (EM64T) extends IA-32 computing to 64-bit. 64-bit extension technology enhances next generation IA-32 server platforms with 64-bit addressability & related instructions ( Click here for additional information on Intel Extended Memory 64 Technology (EM64T) Non-HPE site )¹.

top

Does the ML350 G4p support interleaved memory?

Yes. Unlike the ML350 G3, memory in the ML 350 G4 and G4p must be populated in identical pairs (interleaved) whenever more than one DIMM is installed.

top

Do all models of the ML350 G4p support U320 SCSI, SATA, or SAS hard drives?

No. When selecting an ML350 G4p model, choose a SCSI model for U320 support and SATA/SAS model for serial hard drive support. U320 SCSI is a parallel drive architecture; the U320 hard drives share a bus when communicating with the server system. SATA and SAS use serial communication. Each SATA or SAS drive communicates with the system via its own, point-to-point connection. Due to this substantial difference in architecture, serial drives require a different drive cage and different cables.

top

How can a single drive cage support both SATA and SAS?

A key advantage of serial drive architecture is the deployment flexibility it provides. SAS specifications include support for both SATA and SAS so that one design can accommodate both low cost bulk storage (SATA) and high performance SAS.

Note that support for mixed SAS/SATA configurations requires a SAS drive controller. Availability of the ML350 G4p may precede availability of SAS hard drives and controllers. Configurations that include SATA drives only can utilize a SATA RAID controller.

top

What are the product specific options that are available for the new ProLiant ML350 G4p server?

For a complete list of supported options, including product specific options, please review the ML350 G4p QuickSpecs ( Click here to view the ProLiant ML350 G4p Quickspecs ).

top

How does USB compare to floppy?

USB 2.0 offers a fast interface for low speed peripheral devices - including storage devices. USB drive keys support large data capacities. Available capacities on USB disk keys can support anywhere from 16 to 300 times more capacity than a 1.44 MB floppy disk.

top

Can the front USB port on the ML350 be used for floppy replacement?

Utilities are now available that allow the use of USB drive keys instead of floppy for a number of tasks, including system boot from USB drive key ( Click here for information on "HP Drive Key Boot Utility" )².

top

Does the second serial port option require connection through an I/O slot?

No. The second serial port option connects to a header on the system board and extends at the back of the server through an I/O knockout.

top

How does the new ML350 redundant system fan work?

When installed, the redundant system fan runs in parallel with the standard fan. In the event of a system fan failure, the redundant system fan will provide cooling to the system. Downtime will need to be scheduled to replace the failed fan and re-establish the server's redundant fan mode.

top

Note 1: One or more of the links above will take you outside the Hewlett-Packard Web site. HP does not control and is not responsible for information outside of the HP Web site.

Note 2: Adobe Acrobat Reader software needs to be installed to view the PDF file. Download and install Adobe Acrobat Reader software from the following URL: http://www.adobe.com/products/acrobat/readstep2.html Non-HPE site .

©Copyright 2025 Hewlett Packard Enterprise Development LP Hewlett Packard Enterprise Development shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HPE nor its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett Packard Enterprise Development and the names of Hewlett Packard Enterprise Development products referenced herein are trademarks of Hewlett Packard Enterprise Development in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners.