.. SPDX-License-Identifier: GPL-2.0
  
  ======================
  SCSI Kernel Parameters
  ======================

  See Documentation/admin-guide/kernel-parameters.rst for general information on

  specifying module parameters.
  
  This document may not be entirely up to date and comprehensive. The command

  ``modinfo -p ${modulename}`` shows a current list of all parameters of a loadable

  module. Loadable modules, after being loaded into the running kernel, also
  reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
  parameters may be changed at runtime by the command

  ``echo -n ${value} > /sys/module/${modulename}/parameters/${parm}``.

  ::

  
  	advansys=	[HW,SCSI]
  			See header of drivers/scsi/advansys.c.
  
  	aha152x=	[HW,SCSI]

  			See Documentation/scsi/aha152x.rst.

  
  	aha1542=	[HW,SCSI]
  			Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]
  
  	aic7xxx=	[HW,SCSI]

  			See Documentation/scsi/aic7xxx.rst.

  
  	aic79xx=	[HW,SCSI]

  			See Documentation/scsi/aic79xx.rst.

  	atascsi=	[HW,SCSI]
  			See drivers/scsi/atari_scsi.c.

  
  	BusLogic=	[HW,SCSI]
  			See drivers/scsi/BusLogic.c, comment before function
  			BusLogic_ParseDriverOptions().

  	gdth=		[HW,SCSI]
  			See header of drivers/scsi/gdth.c.
  
  	gvp11=		[HW,SCSI]

  	ips=		[HW,SCSI] Adaptec / IBM ServeRAID controller
  			See header of drivers/scsi/ips.c.

  	mac5380=	[HW,SCSI]
  			See drivers/scsi/mac_scsi.c.

  	scsi_mod.max_luns=
  			[SCSI] Maximum number of LUNs to probe.

  			Should be between 1 and 2^32-1.

  	scsi_mod.max_report_luns=

  			[SCSI] Maximum number of LUNs received.
  			Should be between 1 and 16384.
  
  	NCR_D700=	[HW,SCSI]
  			See header of drivers/scsi/NCR_D700.c.
  
  	ncr5380=	[HW,SCSI]

  			See Documentation/scsi/g_NCR5380.rst.

  
  	ncr53c400=	[HW,SCSI]

  			See Documentation/scsi/g_NCR5380.rst.

  
  	ncr53c400a=	[HW,SCSI]

  			See Documentation/scsi/g_NCR5380.rst.

  	ncr53c8xx=	[HW,SCSI]

  	osst=		[HW,SCSI] SCSI Tape Driver
  			Format: <buffer_size>,<write_threshold>

  			See also Documentation/scsi/st.rst.

  	scsi_debug_*=	[SCSI]
  			See drivers/scsi/scsi_debug.c.

  	scsi_mod.default_dev_flags=

  			[SCSI] SCSI default device flags
  			Format: <integer>

  	scsi_mod.dev_flags=
  			[SCSI] Black/white list entry for vendor and model

  			Format: <vendor>:<model>:<flags>
  			(flags are integer value)

  	scsi_mod.scsi_logging_level=
  			[SCSI] a bit mask of logging levels

  			See drivers/scsi/scsi_logging.h for bits.  Also
  			settable via sysctl at dev.scsi.logging_level
  			(/proc/sys/dev/scsi/logging_level).
  			There is also a nice 'scsi_logging_level' script in the
  			S390-tools package, available for download at

  			https://github.com/ibm-s390-tools/s390-tools/blob/master/scripts/scsi_logging_level

  
  	scsi_mod.scan=	[SCSI] sync (default) scans SCSI busses as they are
  			discovered.  async scans them in kernel threads,
  			allowing boot to proceed.  none ignores them, expecting
  			user space to do the scan.
  
  	sim710=		[SCSI,HW]
  			See header of drivers/scsi/sim710.c.
  
  	st=		[HW,SCSI] SCSI tape parameters (buffers, etc.)

  			See Documentation/scsi/st.rst.

  	wd33c93=	[HW,SCSI]
  			See header of drivers/scsi/wd33c93.c.