Plan 9 - man page for scsi (plan9 section 3)
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scsi - SCSI command interface
bind #S /dev
The scsi interface is accessed through a two-level directory. The scsiid file contains
the SCSI id of the host interface, typically 7, represented textually. Some implementa-
tions allow this to be changed by writing to the file; in many cases, the higher-order
bits are hardware specific.
Each SCSI target n (0<=n<=7) is associated with a subdirectory #S/n containing files cmd,
data, and debug. The following steps may be used to execute a SCSI command:
The command block is written to the cmd file.
The data file is either written or read depending on the direction of the transfer.
(A command that involves no data transfer is executed with a zero-length write.)
The cmd file is read to retrieve the status of the command, returned as a 4-byte
Writing an ASCII to the debug file causes tracing information to be written to /dev/klog;
writing a turns the tracing off.
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