Intel S2600WF Series - Figure 10. 2 U, no Drive Bays, Chassis Only Building Block (Intel Server Chassis R2000 Wfxxx); Figure 11. 2 U, 3.5 X 8 Drive Configuration (Intel Server System R2308 Wfxxx); Figure 12. 2 U, 3.5 X 12 Drive Configuration (Intel Server System R2312 Wfxxx - Storage Configuration)

Intel® Server S2600WF Product Family Configuration Guide
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Figure 10. 2U, No drive bays, chassis only building block (Intel® Server Chassis R2000WFxxx)
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Figure 11. 2U, 3.5" x 8 drive configuration (Intel® Server System R2308WFxxx)
Figure 12. 2U, 3.5" x 12 drive configuration (Intel® Server System R2312WFxxx – storage configuration)