38
Figure 30 Drive numbering for the 16LFF (12 front+4 rear)+2SFF drive configuration (12LFF
server)
Figure 31 Drive numbering for the 16LFF (12 front+4 rear)+4SFF drive configuration (12LFF
server)
PCIe modules
Typically, the PCIe modules are available in the following standard form factors:
• LP—Low profile.
• FHHL—Full height and half length.
• FHFL—Full height and full length.
• HHHL—Half height and half length.
• HHFL—Half height and full length.
Some PCIe modules, such as mezzanine storage controllers, are in non-standard form factors.
Storage controllers
The server supports the following types of storage controllers depending on their form factors:
• Embedded RAID controller—Embedded in the server and does not require installation.
• Mezzanine storage controller—Installed on the Mezzanine storage controller connector of
the system board and does not require a riser card for installation.
• Standard storage controller—Comes in a standard PCIe form factor and typically requires a
riser card for installation.
For some storage controllers, you can order a power fail safeguard module to prevent data loss from
power outages. This module provides a flash card and a supercapacitor. When a system power
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