SCSICTL(8)              NetBSD System Manager's Manual              SCSICTL(8)

     scsictl -- a program to manipulate SCSI devices and busses

     scsictl device command [arg [...]]

     scsictl allows a user or system administrator to issue commands to and
     otherwise control SCSI devices and busses.  It is used by specifying a
     device or bus to manipulate, the command to perform, and any arguments
     the command may require.  scsictl determines if the specified device is
     an actual device or a SCSI bus automatically, and selects the appropriate
     command set.

     For commands which scsictl issues a SCSI command to the device directly,
     any returned sense information will be decoded by scsictl and displayed
     to the standard output.

     The following commands are supported for SCSI devices:

     debug level   Set the debugging level for the given device; the following
                   flags are supported:

                         1   Show scsi commands, errors, data.
                         2   Routine flow tracking.
                         4   Internal info from routine flows.
                         8   Device specific debugging.

                   This option is only supported with kernels compiled with

     defects [primary] [grown] [block|byte|physical]
                   Read the primary and/or grown defect lists from the speci-
                   fied device in block, byte from index, or physical sector
                   format.  The default is to return both the primary and
                   grown defect lists in physical sector format.  This command
                   is only supported on direct access devices.

     format [blocksize [immediate]]
                   (Low level) format the named device.  If the optional
                   blocksize parameter is provided, the device geometry will
                   be modified to use the specified blocksize.  If this param-
                   eter is different form the Current or Default Mode Page 3
                   parameters, the device will update Mode Page 3 at the suc-
                   cessful completion of the Format.  Device geometry may
                   change as a result of using a new device blocksize.  When
                   the optional blocksize parameter is specified, the Defect
                   List on the drive will revert to the original primary
                   defect list created at the time of manufacture if avail-
                   able.  The drive will usually recertify itself during the
                   Format and add any other defective blocks to the new Defect
                   List.  Some disks may not support the ability to change the
                   blocksize and may enter a Degraded Mode when fed a Format
                   command of this type.  If this happens the standard recov-
                   ery for the drive requires issuing a correct Format com-
                   mand, i.e. one without the blocksize parameter.

                   When the immediate parameter is also specified, the disk is
                   instructed to return from the format command right away.
                   It continues to format, and every ten seconds scsictl
                   issues a TEST UNIT READY command to check the associated
                   sense data.  This associated sense data has a progress
                   indicator which indicates how far the format is progress-
                   ing.  Note well that most SCSI disk drives prior to a few
                   years ago do not support this option.

     identify      Identify the specified device, displaying the device's SCSI
                   bus, target, and lun, as well as the device's vendor, prod-
                   uct, and revision strings.

     reassign blkno [blkno [...]]
                   Issues a REASSIGN BLOCKS command to the device, adding the
                   specified blocks to the grown defect list.  This command is
                   only supported on direct access devices.

     release       Send a ``RELEASE'' command to the device to release a
                   reservation on it.

     reserve       Send a ``RESERVE'' command to the device to place a reser-
                   vation on it.

     reset         Reset the device.  This command is only supported for
                   devices which support the SCIOCRESET ioctl.

     start         Send a ``START'' command to the device.  This is useful
                   typically only for disk devices.

     stop          Send a ``STOP'' command to the device.  This is useful typ-
                   ically only for disk devices.

     tur           Send a ``TEST UNIT READY'' command to the device.  This is
                   useful for generating current device status.

     getcache      Returns basic cache parameters for the device.

     setcache none|r|w|rw [save]
                   Set basic cache parameters for the device.  The cache may
                   be disabled (none), the read cache enabled (r), the write
                   cache enabled (w), or both read and write cache enabled
                   (rw).  If the drive's cache parameters are savable, speci-
                   fying save after the cache enable state will cause the
                   parameters to be saved in non-volatile storage.

     flushcache    Explicitly flushes the write cache.

     setspeed speed
                   Set the highest speed that the optical drive should use for
                   reading data.  The units are multiples of a single speed
                   CDROM (150 KB/s).  Specify 0 to use the drive's fastest

     getrealloc    Returns automatic reallocation parameters for the device.

     setrealloc none|r|w|rw [save]
                   Set automatic reallocation parameters for the device.
                   Automatic reallocation may be disabled (none), the auto-
                   matic read reallocation enabled (r), the automatic write
                   reallocation enabled (w), or both automatic read and write
                   reallocation enabled (rw).  If the drive's automatic real-
                   location parameters are savable, specifying save after the
                   automatic reallocation enable state will cause the parame-
                   ters to be saved in non-volatile storage.

     The following commands are supported for SCSI busses:

     reset       Reset the SCSI bus.  This command is only supported if the
                 host adapter supports the SCBUSIORESET ioctl.

     scan target lun
                 Scan the SCSI bus for devices.  This is useful if a device
                 was not connected or powered on when the system was booted.
                 The target and lun arguments specify which SCSI target and
                 lun on the bus is to be scanned.  Either may be wildcarded by
                 specifying the keyword ``any'' or ``all''.

     detach target lun
                 Detach the specified device from the bus.  Useful if a device
                 is powered down after use.  The target and lun arguments have
                 the same meaning as for the scan command, and may also be

     When scanning the SCSI bus, information about newly recognized devices is
     printed to console.  No information is printed for already probed

     /dev/scsibus* - for commands operating on SCSI busses

     ioctl(2), cd(4), ch(4), scsi(4), sd(4), se(4), ss(4), st(4), uk(4),
     atactl(8), dkctl(8)

     The scsictl command first appeared in NetBSD 1.4.

     The scsictl command was written by Jason R. Thorpe of the Numerical Aero-
     space Simulation Facility, NASA Ames Research Center.

NetBSD 9.0                     November 19, 2016                    NetBSD 9.0

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