Figure 12-21 shows the SAS cabling on a Storwize V5030 with six attached expansion  enclosures (three enclosures in each chain). Important:  When a SAS cable is inserted  ensure that the connector is oriented correctly  by confirming that the following conditions are met: GLYPH<SM590000> Cabling is done from the controller view top  down. Top/down button up is  not supported. GLYPH<SM590000> When the connector is inserted correctly  the connector can be removed only by pulling  the tab. GLYPH<SM590000> Insert the connector gently until it clicks into place. If you feel resistance  the connector  is probably oriented the wrong way. Do not force it. GLYPH<SM590000> The pull tab must be below the connector. Figure 12-21 SAS expansion cabling on the Storwize V5030 Chapter 12. RAS  monitoring  and troubleshooting  639