Removing EnclosuresDell Compellent 199Remove an SC200/SC220 EnclosureThese instructions describe how to remove the top enclosure from a SC200/SC220enclosure chain. If the configuration has two enclosure chains, you do not need to take asystem outage; however, the controller must be able to see all drives through one chainwhile the other side is down.Disconnect the A-side ChainDisconnect the enclosure to be removed from the A‐side chain.1 Disconnect the A‐side cable from Controller A: slot 6, port 1. The B side continues tocarry IO while the A side is disconnected (see Figure 128 on page 200).2 In the Configure Local Ports wizard, make sure that the B‐side ports on both controllersare Up and the Target Count recognizes the drives through the B side.3 Remove the cable between: Enclosure 1: top, port B → Enclosure 2: top, port A (seeFigure 128 on page 200).4 Move the cable from Enclosure 1: top, port A → Enclosure 2: top, port A (see Figure 129on page 201).5 Reconnect the top cable to Controller A: slot 6, port 1 (see Figure 130 on page 203).Caution: To disconnect the A‐side cabling without a system outage, make sure thatyou first disconnect the A‐side cable from the controller. Disconnecting any othercable first disrupts IO to the enclosure, resulting in a system outage.
