Lenovo ThinkSystem SR950 Setup Manual page 219

Figure 91. Hard disk drive backplane (upper) installation
Align the backplane with its location in the tray; then, insert the backplane and push it down until it
is fully seated.
Step 3. Connect the data cables to the backplane. (SAS backplanes have only one data cable. NVME
backplanes have two data cables.) See "Cable routing for drives" on page 41.
Step 4. Repeat Step 1 on page 214, Step 2 on page 214, and Step 3 on page 215 for each hard disk drive
backplane being installed in the upper tray.
Step 5. Turn the tray upside down.
Step 6. Route and connect the data cables. See "Cable routing for drives" on page 41.
• Route each SAS data cable to its connector on the RAID adapter; then, connect the SAS cable.
• Route each NVME data cable to its connector on a system board or optional storage tray; then,
connect the NVME cable.
Step 7. Make sure that all power cables are connected to the storage interposer.
Step 8. Make sure that all of the cables are correctly routed after they have been connected.
After you install a hard disk drive backplane:
1. Install the fan cage. See "Install a fan cage (upper tray)" on page 200.
2. Turn the tray right-side up.
3. Install the upper compute tray or storage tray. See "Install a compute tray" on page 190 or "Install the
storage tray (fully removed)" on page 256.
4. Install any hard disk drives that you removed from the upper tray. Each drive should be installed in its
original location. See "Install a hard disk drive" on page 207.
5. Install the front cover. See "Install the front cover" on page 205.
Install a hard disk drive backplane (lower tray)
Hard disk drive backplanes in the lower compute tray are accessed from the front of the server. There are
several types of hard disk drive backplane. Steps that are backplane specific are noted in each procedure.
S002
Appendix B. Component reference
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