Product Documentation
Abstract
System board diagram and jumper settings for the PC Server 325
Content
System Board
Jumper Settings
| Jumper | Default Jumper Position | Jumper Description (from left to right) |
|---|---|---|
| J23-1 |  | Primary microprocessor (default). If you replace the microprocessor that comes with the server, you might need to move the jumper to the opposite position. |
| J23-2 |  | Secondary microprocessor (default). The primary and secondary ECC microprocessors must have the same cache size and cache speed; the jumpers should be set to the same position. If you add microprocessors that differ from the one that comes with the server, you might need to move the jumpers to the opposite position. |
| J23-3 |  | Flash update enable jumper: Enabled. You must move the jumper from the default jumper position to block updates to the flash BIOS on the system board. |
| J23-4 |  | Recovery boot block is protected from accidental overwrite. The flash memory contains a protected area that cannot be corrupted. The code in this area enables the server to start from a diskette when the BIOS becomes corrupted, for example, if a power failure occurs during a flash update. After starting, the flash utility automatically recovers the system BIOS from the BIOS recovery files on the diskette. When the flash is complete, the jumper must be moved to the default, disabled, position. The recovery boot procedure requires two flash diskette: one for the main system flash, and one for the boot block. |
| J23-5 |  | Boot block is protected from accidental overwrite. |
| J23-6 |  | VPD write is disabled. You must move the jumper from the default jumper position to update or overwrite the Vital Product Data. |
| J23-7 |  | Tamper detection/Clear CMOS. The default is no jumper. When you install the System Management adapter, you must install a jumper on the two pins closest to the microprocessor board. This jumper position clears CMOS and all configuration information, including the power-on password. |
| J35 |  | SCSI Disable (normally enabled) Not present on early System Boards. |
| J36 |  | Ethernet Disable (normally enabled) Not present on early System Boards. |
Document Location
Worldwide
[{"Type":"HW","Business Unit":{"code":"BU016","label":"Multiple Vendor Support"},"Product":{"code":"HWS17","label":"Older System x->PC Server 325"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Line of Business":{"code":"","label":""}}]
Was this topic helpful?
Document Information
Modified date:
23 January 2019
UID
ibm1MCGN-3R4RN3