Sun Microsystems Enterprise 250 Owner's Manual page 119

What to Do
1. Disconnect the diskette data cable (if present) from the top of the UltraSCSI
backplane at connector J0502.
2. Disconnect the removable media power cable from the UltraSCSI backplane at
connector J0104.
3. Disconnect the removable media SCSI cable from the top of the UltraSCSI
backplane at connector J0501.
Leave all other cabling connected to the rear of the drives in the removable media
assembly.
Chapter 6 Removing and Installing Storage Devices 101