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Figure 45 DDR5 DIMM population schemes for four processors (2)
Number of DIMMs
CH8
H0
4
√
8
√
16
√
24
√
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32
√
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48
√
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64
√
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Storage
The SFF hard drive backplane supports the installation of SFF SAS/SATA hard drives.
The LFF hard drive backplane supports the installation of LFF SAS/SATA hard drives, or SFF to
LFF SAS/SATA hard drives.
The SFF UniBay hard drive backplane supports the installation of SFF SAS/SATA/NVMe hard
drives.
The LFF UniBay hard drive backplane supports the installation of LFF SAS/SATA/NVMe hard
drives, or SFF to LFF SAS/SATA/NVMe hard drives.
The E1.S hard drive backplane supports the installation of E1.S NVMe hard drives.
NOTE:
An SFF (Small Form Factor) drive is a 2.5-inch drive.
An LFF (Large Form Factor) drive is a 3.5-inch drive.
Table 36 Comparison of RAID levels
Explanation of
RAID levels
RAID 0
RAID 1
RAID 5
RAID 6
RAID 10
RAID 1E
RAID 50
RAID 60
Note: N represents the number of member drives in a RAID group and M represents the number
of sub-groups for a RAID group.
I/O expansion
The R6900 G6 provides the following types of PCIe extended modules. You can choose devices
based on required module types and rates.
FC HBA modules
Processor mezzanine board (processor 4)
CH7
CH6
CH5
CH1
H1
G0
G1
F0
F1
E0
E1
A1
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Reliability
Read performance
Low
High
High
High
Higher
High
Higher
High
High
High
High
Medium
High
High
High
High
DIMM population
CH2
CH3
CH4
CH8
A0
B1
B0
C1
C0
D1
D0
H0
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Write performance
High
Low
Medium
Medium
Medium
Medium
Higher
Higher
3
Processor mezzanine board (processor 3)
CH7
CH6
CH5
CH1
H1
G0
G1
F0
F1
E0
E1
A1
●
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CH2
CH3
CH4
A0
B1
B0
C1
C0
D1
D0
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Disk utilization
100%
50%
(N-1)/N
(N-2)/N
50%
50%
(N-M)/N
(N-M*2)/N
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