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

NAME
     scsictl -- a program to manipulate SCSI devices and busses

SYNOPSIS
     scsictl device command [arg [...]]

DESCRIPTION
     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.

DEVICE COMMANDS
     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
                   SCSIPI_DEBUG.

     defects [primary] [grown] [block|byte|physical]
                   Read the primary and/or grown defect lists from the
                   specified 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
                   parameter is different form the Current or Default Mode
                   Page 3 parameters, the device will update Mode Page 3 at
                   the successful 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
                   available.  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 recovery for the drive requires issuing a correct
                   Format command, 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
                   progressing.  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,
                   product, and revision strings.  It 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
                   reservation 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
                   typically 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,
                   specifying 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
                   speed.

     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
                   automatic read reallocation enabled (r), the automatic
                   write reallocation enabled (w), or both automatic read and
                   write reallocation enabled (rw).  If the drive's automatic
                   reallocation parameters are savable, specifying save after
                   the automatic reallocation enable state will cause the
                   parameters to be saved in non-volatile storage.

BUS COMMANDS
     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
                 wildcarded.

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

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

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

HISTORY
     The scsictl command first appeared in NetBSD 1.4.

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

NetBSD 7.1.2                   November 19, 2016                  NetBSD 7.1.2