Specifications & Manual
https://www-304.ibm.com/systems/support/supportsite.wss/docdisplay?brandind=5000008&lndocid=MIGR-58359

IBM Dynamic System Analysis (DSA) Bootable version download
http://www-304.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-5071800&brandind=5000008

IBM Dynamic System Analysis (DSA) general software matrix
http://www-304.ibm.com/systems/support/supportsite.wss/docdisplay?brandind=5000008&lndocid=SERV-DSA#xseries

Diagnostic error codes - IBM eServer xSeries 345
https://www-304.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-53292&brandind=5000008

Flash BIOS update (DOS update package) - IBM eServer xSeries 345
https://www-304.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-43902&brandind=5000008

Forum
http://www.ibm.com/developerworks/forums/forum.jspa?forumID=740

Hardware compatibility list
http://www-03.ibm.com/servers/eserver/serverproven/compat/us/xseries_old/x345.html