现有一二手IBM xseries232，
（三无：无保修、说明书、光盘。）
双128M SD内存，插在1，4槽上。
现买了两根ECC 256M 内存，插在2，3槽上。
插上之后已开机认出768M内存，
但提示：164 MEMORY SIZE HAS CHANGED
要进行BIOS设置，
在Advanced Setup/Memory Settings下找到设置：

问题在这：Memory Settings下的
BANK1  ROW 0  ENABLE
BANK1  ROW 1  EMPTY        无法改为 ENABLE
BANK2  ROW 2  ENABLE
BANK2  ROW 3  EMPTY        无法改为 ENABLE

按任何键都无法设置。
用过IBM服务器的帮个忙。谢谢。

这是网上查到的说明书有关BIOS的项：

- system partition visibility

    select this choice to choose whether the system partition is visible or hidden.

    - memory settings

    select this choice to manually disable or enable a bank of memory.

    if a memory error is detected during post or memory configuration, the server can automatically disable the failing memory bank and continue operating with reduced memory capacity. if this occurs, you must manually enable the memory bank after the problem is corrected. select memory settings from the advanced setup menu, use the arrow keys to highlight the bank that you want to enable; then, use the arrow keys to select enable.