ix
Hardware diagnostic testing 131
Verifying proper operation of key system lights 131
Specific problems and corrective actions 132
Error beep codes 139
BIOS POST error beep codes 139
ARMC/3 module error beep codes 141
Diagnostic POST code LEDs 142
Appendix A: Acer Altos R520
rack installation guide 149
Setting up the system rack 151
System rack installation 153
Vertical mounting hole pattern 154
Installing the system into the rack 155
Appendix B: RAID configuration 163
Configuring integrated SAS RAID 165
Configuring the integrated SAS SW RAID 167
Configuring the onboard SATA RAID 169
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