• View the Lenovo XClarity Controller event log for events related to power supplies or vibration issues and
resolve those events.
• View the storage subsystem log for events related to the storage subsystem and resolve those events.
A replacement hard disk drive does not rebuild
Complete the following steps until the problem is solved:
1. Make sure that the hard disk drive is recognized by the adapter (the green hard disk drive activity LED is
flashing).
2. Review the SAS/SATA RAID adapter documentation to determine the correct configuration parameters
and settings.
Green hard disk drive activity LED does not represent actual state of associated drive
Complete the following steps until the problem is solved:
1. If the green hard disk drive activity LED does not flash when the drive is in use, run the diagnostics tests
for the hard disk drives. When you start a server and press the key according to the on-screen
instructions, the LXPM interface is displayed by default. (For more information, see the “Startup” section
in the LXPM documentation compatible with your server at
https://sysmgt.lenovofiles.com/help/topic/
lxpm_frontend/lxpm_product_page.html
.) You can perform hard drive diagnostics from this interface.
From the Diagnostic page, click Run Diagnostic ➙ Disk Drive Test
2. If the drive passes the test, replace the backplane.
3. If the drive fails the test, replace the drive.
Yellow hard disk drive status LED does not represent actual state of associated drive
Complete the following steps until the problem is solved:
1. Turn off the server.
2. Reseat the SAS/SATA adapter.
3. Reseat the backplane signal cable and backplane power cable.
4. Reseat the hard disk drive.
5. Power on the server and observe the activity of the hard disk drive LEDs.
U.3 NVMe drive can be detected in NVMe connection, but cannot be detected in Tri-mode
In Tri-mode, NVMe drives are connected via a PCIe x1 link to the controller. To support Tri-mode with U.3
NVMe drives, U.3 x1 mode must be enabled for the selected drive slots on the backplane through the XCC
Web GUI. By default, the backplane setting is U.2 x4 mode.
Complete the following steps to enable U.3 x1 mode:
1. Log into the XCC Web GUI, and choose Storage ➙ Detail from the navigation tree on the left.
2. In the window that is displayed, click the icon
next to Backplane.
3. In the dialog box that is displayed, select the target drive slots and click Apply.
4. Do a DC power cycle to make the setting take effect.
Intermittent problems
Use this information to solve intermittent problems.
•
“Intermittent external device problems” on page 218
• “Intermittent KVM problems” on page 218
Chapter 8. Problem determination 217
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