CHAPTER 4: Installing Components www.gateway.com42Mirroring mode:Sparing modeFor the sparing mode, follow the online spare FBDIMM configurationrequirements (in addition to general configuration requirements) below:■ When only DIMM1 and DIMM3 are being used, they must be fullypopulated with dual-rank FBDIMMs.■ If DIMM1 and DIMM3, and DIMM2 and DIMM4 are being used, they mustbe fully populated.■ If installed, DIMM1 and DIMM3, and DIMM2 and DIMM4 must containFBDIMMs with identical part numbers.■ If installed, DIMM5 and DIMM7, and DIMM6 and DIMM8 must also containFBDIMMs with identical part numbers.In the online spare mode, FBDIMMs must be populated as specified in thefollowing table:* Use only DIMM1 and DIMM3 with dual-rank FBDIMMs.DIMM Installation Options - Mirroring ModeDIMM DIMM1 DIMM2 DIMM3 DIMM4 DIMM5 DIMM6 DIMM7 DIMM8 TotalUsableMemory4 512 MB - 512 MB - 512 MB - 512 MB - 1 GB1 GB - 1 GB - 1 GB - 1 GB - 2 GB2 GB - 2 GB - 2 GB - 2 GB - 4 GB4 GB - 4 GB - 4 GB - 4 GB - 8 GB8 512 MB 512 MB 512 MB 512 MB 512 MB 512 MB 512 MB 512 MB 2 GB1 GB 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB 1 GB 4 GB2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 2 GB 8 GB4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 4 GB 16 GBDIMM Installation Options - Sparing ModeDIMM DIMM1 andDIMM3 DIMM2 andDIMM4 DIMM5 andDIMM7 DIMM6 andDIMM82* X - - -4 X X - -8 X X X X
