Documentation/scsi/scsi-parameters.rst

   1 .. SPDX-License-Identifier: GPL-2.0
   2
   3 ======================
   4 SCSI Kernel Parameters
   5 ======================
   6
   7 See Documentation/admin-guide/kernel-parameters.rst for general information on
   8 specifying module parameters.
   9
  10 This document may not be entirely up to date and comprehensive. The command
  11 ``modinfo -p ${modulename}`` shows a current list of all parameters of a loadable
  12 module. Loadable modules, after being loaded into the running kernel, also
  13 reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
  14 parameters may be changed at runtime by the command
  15 ``echo -n ${value} > /sys/module/${modulename}/parameters/${parm}``.
  16
  17 ::
  18
  19         advansys=       [HW,SCSI]
  20                         See header of drivers/scsi/advansys.c.
  21
  22         aha152x=        [HW,SCSI]
  23                         See Documentation/scsi/aha152x.rst.
  24
  25         aha1542=        [HW,SCSI]
  26                         Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]
  27
  28         aic7xxx=        [HW,SCSI]
  29                         See Documentation/scsi/aic7xxx.rst.
  30
  31         aic79xx=        [HW,SCSI]
  32                         See Documentation/scsi/aic79xx.rst.
  33
  34         atascsi=        [HW,SCSI]
  35                         See drivers/scsi/atari_scsi.c.
  36
  37         BusLogic=       [HW,SCSI]
  38                         See drivers/scsi/BusLogic.c, comment before function
  39                         BusLogic_ParseDriverOptions().
  40
  41         gvp11=          [HW,SCSI]
  42
  43         ips=            [HW,SCSI] Adaptec / IBM ServeRAID controller
  44                         See header of drivers/scsi/ips.c.
  45
  46         mac5380=        [HW,SCSI]
  47                         See drivers/scsi/mac_scsi.c.
  48
  49         scsi_mod.max_luns=
  50                         [SCSI] Maximum number of LUNs to probe.
  51                         Should be between 1 and 2^32-1.
  52
  53         scsi_mod.max_report_luns=
  54                         [SCSI] Maximum number of LUNs received.
  55                         Should be between 1 and 16384.
  56
  57         NCR_D700=       [HW,SCSI]
  58                         See header of drivers/scsi/NCR_D700.c.
  59
  60         ncr5380=        [HW,SCSI]
  61                         See Documentation/scsi/g_NCR5380.rst.
  62
  63         ncr53c400=      [HW,SCSI]
  64                         See Documentation/scsi/g_NCR5380.rst.
  65
  66         ncr53c400a=     [HW,SCSI]
  67                         See Documentation/scsi/g_NCR5380.rst.
  68
  69         ncr53c8xx=      [HW,SCSI]
  70
  71         osst=           [HW,SCSI] SCSI Tape Driver
  72                         Format: <buffer_size>,<write_threshold>
  73                         See also Documentation/scsi/st.rst.
  74
  75         scsi_debug_*=   [SCSI]
  76                         See drivers/scsi/scsi_debug.c.
  77
  78         scsi_mod.default_dev_flags=
  79                         [SCSI] SCSI default device flags
  80                         Format: <integer>
  81
  82         scsi_mod.dev_flags=
  83                         [SCSI] Black/white list entry for vendor and model
  84                         Format: <vendor>:<model>:<flags>
  85                         (flags are integer value)
  86
  87         scsi_mod.scsi_logging_level=
  88                         [SCSI] a bit mask of logging levels
  89                         See drivers/scsi/scsi_logging.h for bits.  Also
  90                         settable via sysctl at dev.scsi.logging_level
  91                         (/proc/sys/dev/scsi/logging_level).
  92                         There is also a nice 'scsi_logging_level' script in the
  93                         S390-tools package, available for download at
  94                         https://github.com/ibm-s390-linux/s390-tools/blob/master/scripts/scsi_logging_level
  95
  96         scsi_mod.scan=  [SCSI] sync (default) scans SCSI busses as they are
  97                         discovered.  async scans them in kernel threads,
  98                         allowing boot to proceed.  none ignores them, expecting
  99                         user space to do the scan.
 100
 101         sim710=         [SCSI,HW]
 102                         See header of drivers/scsi/sim710.c.
 103
 104         st=             [HW,SCSI] SCSI tape parameters (buffers, etc.)
 105                         See Documentation/scsi/st.rst.
 106
 107         wd33c93=        [HW,SCSI]
 108                         See header of drivers/scsi/wd33c93.c.