Lenovo ThinkSystem SR645 Maintenance Manual page 110

Table 23. 2.5-inch drive bay combinations (continued)
Total
No.
drives
SAS/SATA
2b 10
3a 10
3b 12
3c 10
3d 12
3e 10
3f 10
3g
12
3h 12
3i 10
Table 24. 3.5-inch drive bay combinations
Total
No.
drives
SAS/SATA
1a 4
1b 6
1c 6
2a 4
2c 6
2d 6
Note: For models without any backplanes or drives, field upgrades to other models are available. For details,
check the option part numbers you will need when ordering for different configurations:
Drive installation requirements
The following notes describe information that you must consider when you install a drive.
• The drive bays are numbered to indicate the installation order (starting from number "0"). Follow the
installation order when you install a drive. See Front view.
• The drives in a single RAID array must be the same type, same size, and same capacity.
• You can mix drives of different types and different capacities in one system, but not in one RAID array.
The following priorities are recommended:
– Drive type priority: NVMe SSD, SAS SSD, SATA SSD, SAS HDD, SATA HDD
– Drive capacity priority: the lowest capacity first
– RAID arrays are not support for NVMe SSD drives.
– RAID arrays are not support for AIC(all-in-card) SSD drives.
– RAID arrays are not support for SED or FIPS HDD/SSD drives.
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Front bays
AnyBay
8
10
10
8
6 4
6 4
6
6 2
Front bays
AnyBay
4
4
4
4
Rear bays
NVMe SAS/SATA
2
2
10
10 2
2
2
4 2
2
Rear bays
SAS/SATA NVMe
2
2
2
2
7mm drives M.2 drives
SATA/NVMe SATA/NVMe
Optional
Optional Optional
Optional
Optional Optional
Optional
Optional Optional
Optional
Optional
Optional
7mm drives M.2 drives
SATA/NVMe SATA/NVMe
Optional Optional
Optional
Optional
Optional Optional
Optional
Optional
Field upgrades