
SINGLE CHANNEL MODE FOR EARLY REVISION DRIVES
On early revisions of the drive, JP1 did not exist. These drives are identified by having a serial number of “50” or less and only have an 
The SELECT_ID bits are normally configured by jumpers or a switch that allows the ID of the drive to be set using the backplane of the 
Table 39. SELECT_ID Configurations
Bit 6 | Bits 5  | Bit 0  | Configuration Result | 
  | 
  | 
  | 
  | 
0  | XXXXX  | X  | Loop ID 0 - 63  | 
  | 
  | 
  | Drive operates down both channels.  | 
  | 
  | 
  | 
  | 
1  | XXXXX  | 0  | Loop ID 64 - 126 and even  | 
  | 
  | 
  | Drive operates down channel A only.  | 
  | 
  | 
  | 
  | 
1  | XXXXX  | 1  | Loop ID 65 - 127 and odd  | 
  | 
  | 
  | Drive operates down channel B only.  | 
  | 
  | 
  | 
  | 
66  | ZeusIOPS   |