1                          SCSI Kernel Parameters
2                          ~~~~~~~~~~~~~~~~~~~~~~
3
4See Documentation/admin-guide/kernel-parameters.rst for general information on
5specifying module parameters.
6
7This document may not be entirely up to date and comprehensive. The command
8"modinfo -p ${modulename}" shows a current list of all parameters of a loadable
9module. Loadable modules, after being loaded into the running kernel, also
10reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
11parameters may be changed at runtime by the command
12"echo -n ${value} > /sys/module/${modulename}/parameters/${parm}".
13
14
15	advansys=	[HW,SCSI]
16			See header of drivers/scsi/advansys.c.
17
18	aha152x=	[HW,SCSI]
19			See Documentation/scsi/aha152x.txt.
20
21	aha1542=	[HW,SCSI]
22			Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]
23
24	aic7xxx=	[HW,SCSI]
25			See Documentation/scsi/aic7xxx.txt.
26
27	aic79xx=	[HW,SCSI]
28			See Documentation/scsi/aic79xx.txt.
29
30	atascsi=	[HW,SCSI]
31			See drivers/scsi/atari_scsi.c.
32
33	BusLogic=	[HW,SCSI]
34			See drivers/scsi/BusLogic.c, comment before function
35			BusLogic_ParseDriverOptions().
36
37	gdth=		[HW,SCSI]
38			See header of drivers/scsi/gdth.c.
39
40	gvp11=		[HW,SCSI]
41
42	ips=		[HW,SCSI] Adaptec / IBM ServeRAID controller
43			See header of drivers/scsi/ips.c.
44
45	mac5380=	[HW,SCSI]
46			See drivers/scsi/mac_scsi.c.
47
48	scsi_mod.max_luns=
49			[SCSI] Maximum number of LUNs to probe.
50			Should be between 1 and 2^32-1.
51
52	scsi_mod.max_report_luns=
53			[SCSI] Maximum number of LUNs received.
54			Should be between 1 and 16384.
55
56	NCR_D700=	[HW,SCSI]
57			See header of drivers/scsi/NCR_D700.c.
58
59	ncr5380=	[HW,SCSI]
60			See Documentation/scsi/g_NCR5380.txt.
61
62	ncr53c400=	[HW,SCSI]
63			See Documentation/scsi/g_NCR5380.txt.
64
65	ncr53c400a=	[HW,SCSI]
66			See Documentation/scsi/g_NCR5380.txt.
67
68	ncr53c8xx=	[HW,SCSI]
69
70	osst=		[HW,SCSI] SCSI Tape Driver
71			Format: <buffer_size>,<write_threshold>
72			See also Documentation/scsi/st.txt.
73
74	scsi_debug_*=	[SCSI]
75			See drivers/scsi/scsi_debug.c.
76
77	scsi_mod.default_dev_flags=
78			[SCSI] SCSI default device flags
79			Format: <integer>
80
81	scsi_mod.dev_flags=
82			[SCSI] Black/white list entry for vendor and model
83			Format: <vendor>:<model>:<flags>
84			(flags are integer value)
85
86	scsi_mod.scsi_logging_level=
87			[SCSI] a bit mask of logging levels
88			See drivers/scsi/scsi_logging.h for bits.  Also
89			settable via sysctl at dev.scsi.logging_level
90			(/proc/sys/dev/scsi/logging_level).
91			There is also a nice 'scsi_logging_level' script in the
92			S390-tools package, available for download at
93			http://www-128.ibm.com/developerworks/linux/linux390/s390-tools-1.5.4.html
94
95	scsi_mod.scan=	[SCSI] sync (default) scans SCSI busses as they are
96			discovered.  async scans them in kernel threads,
97			allowing boot to proceed.  none ignores them, expecting
98			user space to do the scan.
99
100	scsi_mod.use_blk_mq=
101			[SCSI] use blk-mq I/O path by default
102			See SCSI_MQ_DEFAULT in drivers/scsi/Kconfig.
103			Format: <y/n>
104
105	sim710=		[SCSI,HW]
106			See header of drivers/scsi/sim710.c.
107
108	st=		[HW,SCSI] SCSI tape parameters (buffers, etc.)
109			See Documentation/scsi/st.txt.
110
111	wd33c93=	[HW,SCSI]
112			See header of drivers/scsi/wd33c93.c.
113