EISA Fast SCSI Caching Adapter
Warning: Do not power-down the system while this LED is still active. Doing so may result in loss of data as the contents of the cache buffer have not been completely written to the disk.
Mirroring Beeper (JP2)
JP2 is used to issue the warning beep through a speaker when an error occurs during the process of disk mirroring. It can be connected to the SPEAKER in the front panel of your system or to another speaker complying with the same specification of the system’s SPEAKER.
Floppy Enable/Disable (JP3)
JP3 is shorted to enable the floppy controller of the DC-820B. Note that only one floppy controller can be enabled in the system. If another floppy control- ler in the system cannot be disabled, then JP3 should be left open (floppy controller disabled).
1.2 Checking the Terminators on the SCSI Bus
In order to stabilize the SCSI bus only two sets of resistor array terminators should be installed — one at each end. Since DC-820B equips with Active Terminators on board and can be selected to Enable or Disable by entering the ECU utility of your mainboard, you don't need to open your cabinet to do the adjustment (refer to Sec. 1.6.2 for Controller Terminator option). The following explains the terminators installation:
1.Only internal devices are connected to the DC-820B: Leave terminators mounted on both the host adapter (i.e., Enable) and the last device connected to the internal SCSI cable. Remove the terminators on all devices connected in between.
2.Only external devices are connected to the DC-820B: Leave terminators mounted on both the host adapter (i.e., Enable) and the last device connected to the external SCSI cable. Remove the terminators on all devices connected in between.
3.Both internal and external devices are connected to the DC-820B: Re- move terminators on the host adapter (i.e., Disable) and leave the other sets of terminators mounted on the last devices connected to the internal and
