Lenovo ThinkSystem SR950 Setup Manual page 336

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 40.
Step 4. Repeat Step 1 on page 331, Step 2 on page 331, and Step 3 on page 332 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 40.
• 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 317.
2. Turn the tray right-side up.
3. Install the upper compute tray or storage tray. See "Install a compute tray" on page 307 or "Install the
storage tray (fully removed)" on page 377.
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 324.
5. Install the front cover. See "Install the front cover" on page 322.
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
CAUTION:
The power-control button on the device and the power switch on the power supply do not turn off the
electrical current supplied to the device. The device also might have more than one power cord. To
remove all electrical current from the device, ensure that all power cords are disconnected from the
power source.
"
CAUTION:
Make sure that all server power cords are disconnected from their power sources before performing
this procedure.
Complete the following steps to install a hard disk drive backplane in the lower compute tray.
Watch the procedure. A video of the replacement process is available:
•
YouTube
ThinkSystem SR950 Setup Guide
332
" on page 56 " " on page 254