Fujitsu PRIMERGY RX2530 M4 Operating Manual page 24

Functional overview
RAID controllers (expansion cards)
RAID controllers
Slots
PCI-Express 3.0 x8
PCI-Express 3.0 x16 3x low profile (2nd CPU required for slot 4)
Slot notes
Drive bays
HDD bay
configuration
Accessible drive bays 1x 5.25/0.5-inch for DVD/RW-Blu-ray (not for 10 HDD
Notes accessible
drives
24
Modular RAID 0/1 controller with "MegaRAID
functionality" (integrated MegaRAID).
RAID levels 0, 1, 10, 5 and 50 are supported for
internal HDD configurations.
Modular RAID 5/6 controller with "MegaRAID
functionality" (integrated MegaRAID).
RAID levels 0, 1, 10, 5, 50, 6 and 60 are supported for
internal HDD configurations. As an option, a flash
backup unit (FBU) can save the memory content even
if the power fails. Cache memory size of up to 8GB are
available.
1x low profile
One PCIe Gen3 x8 slot may be occupied with a
Modular RAID controller if configured.
4x, 8x, 10x 2.5-inch or 4x 3.5-inch
variant)
all possible options described in relevant system
configurator
Operating Manual
RX2530 M4