Models: DSAS-3270, 3360, 3540 and 3720

Option block

Jumper position and function are as shown below.  The jumpers control SCSI device ID, Auto spin up, Unit attention, SCSI terminator connection, and Target initiated synchronous negotiation.

Default settings

Notes:

1. The jumper position of JP1, 2, and 3 define SCSI ID of the drive.
   If JP1,JP2,JP3 are Off, Off, Off the SCSI ID is 0. (Shipping default)
   If JP1,JP2,JP3 are On, Off, Off the SCSI ID is 1.
   If JP1,JP2,JP3 are Off, On, Off the SCSI ID is 2.
   If JP1,JP2,JP3 are On, On, Off the SCSI ID is 3.
   If JP1,JP2,JP3 are Off, Off, On the SCSI ID is 4.
   If JP1,JP2,JP3 are On, Off, On the SCSI ID is 5.
   If JP1,JP2,JP3 are Off, On, On the SCSI ID is 6.
   If JP1,JP2,JP3 are On, On, On the SCSI ID is 7.
2. If JP4 is Off, the drive will spin up automatically after power on reset. If JP4 is On, the drive will not spin up unless the host system issues a start command to the drive.
3. If JP5 is On, Unit Attention after power on reset or SCSI bus reset is disabled.
4. If JP6 is On, the internal SCSI terminator works.
5. If JP7 is On, Target initiated synchronous negotiation is disabled, and then the Initiator is required to start a negotiation handshake if synchronous SCSI transfers are desired.
6. The drive has an internal Active SCSI bus terminator, and can be controlled on/off with one jumper block provided at the card edge.