Man page 9 : proc_scsi_write

proc_scsi_write - handle writes to /proc/scsi/scsi

ssize_t proc_scsi_write(struct file *  file , const char __user *  buf , size_t  length , loff_t *  ppos );

file
    not used

buf
    buffer to write

length
    length of buf, at most PAGE_SIZE

ppos
    not used

this provides a legacy mechanism to add or remove devices by Host, Channel, ID, and Lun. To use, « echo Aqscsi add-single-device 0 1 2 3Aq > /proc/scsi/scsi » or « echo Aqscsi remove-single-device 0 1 2 3Aq > /proc/scsi/scsi » with « 0 1 2 3 » replaced by the Host, Channel, Id, and Lun.

this seems to be aimed at parallel SCSI. Most modern busses (USB, SATA, Firewire, Fibre Channel, etc) dynamically assign these values to provide a unique identifier and nothing more.

James Bottomley <>
    Author.

Rob Landley <>
    Author.