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NetBSD 6.1.5 - man page for scsictl (netbsd section 8)

SCSICTL(8)			   BSD 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 com-
     mand to perform, and any arguments the command may require.  scsictl determines if the spec-
     ified 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:

     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

     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 dif-
     ferent 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 abil-
     ity 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 the specified device, displaying the device's SCSI bus, target, and lun, as well as
     the device's vendor, product, 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.


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


     Send a ``RESERVE'' command to the device to place a reservation on it.


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


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


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


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


     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.


     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.

     The following commands are supported for SCSI busses:


     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

     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 con-
     sole.  No information is printed for already probed devices.

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

     ioctl(2), cd(4), ch(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 Aerospace Simulation
     Facility, NASA Ames Research Center.

BSD					 January 22, 2007				      BSD

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