Lenovo 3797 - Manual (Page 98)

Notes:
1. When you restart the server for the first time after you install a SAS controller
with a battery, the monitor screen remains blank while the controller initializes
the battery. This might take a few minutes, after which the startup process
continues. This is a one-time occurrence.
Important: You must allow the initialization process to be completed. If you do
not, the battery pack will not work, and the server might not start.
The battery comes partially charged, at 30% or less of capacity. Run the server
for 4 to 6 hours to fully charge the controller battery. The LED just above the
battery on the controller remains lit until the battery is fully charged.
Until the battery is fully charged, the controller firmware sets the controller
cache to write-through mode; after the battery is fully charged, the controller
firmware re-enables write-back mode.
2. When you restart the server, you will be given the opportunity to import the
existing RAID configuration to the new SAS controller.
Moving the SAS-controller retention bracket
Note: This procedure applies only to servers that have the following SAS riser card
installed.
1 USB connector
2 PCI Express RAID adapter
3 SATA tape signal
4 Tape drive power
5 SAS controller error LED
6 USB tape
To move the SAS-controller retention bracket to a different position to accommodate
the dimensions of the current SAS controller, complete the following steps:
1. Read the safety information that begins on page vii and “Installation guidelines”
on page 33.
2. Make sure that the server and all peripheral devices are turned off and that the
power cords and all external cables are disconnected.
3. Remove the SAS riser-card assembly from the server (see “Removing the SAS
riser card and controller assembly” on page 77).
4. Remove the RAID controller from the SAS riser card.
82 ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide