February 3, 1997 SE 4

### NAME

se - Cabletron EA41x SCSI bus Ethernet interface driver

### SYNOPSIS

se* at scsibus? target ? lun ?

### DESCRIPTION

The se driver supports the Cabletron EA41x SCSI bus Ethernet interface.

This driver is a bit unusual. It must look like a network interface and it must also appear to be a SCSI device to the SCSI system.

In addition, to facilitate SCSI commands issued by userland programs, there are open(``), close(``), and ioctl(``) entry points. This allows a user program to, for example, display the EA41x statistic and download new code into the adaptor - functions which can't be performed through the ifconfig(8) interface. Normal operation does not require any special userland program.

### SEE ALSO

scsi(4), ifconfig(8)

### AUTHORS

Ian Dall <ian.dall@dsto.defence.gov.au>

Acknowledgement: Thanks are due to Philip L. Budne <budd@cs.bu.edu> who reverse engineered the EA41x. In developing this code, Phil's userland daemon "etherd", was referred to extensively in lieu of accurate documentation for the device.

### BUGS

The EA41x doesn't conform to the SCSI specification in much at all. About the only standard command supported is "inquiry. Most commands are 6 bytes long, but the recv data is only 1 byte. Data must be received by periodically polling the device with the recv command.