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OpenSolaris 2009.06 - man page for format.dat (opensolaris section 4)

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format.dat(4)				   File Formats 			    format.dat(4)

       format.dat - disk drive configuration for the format command

       format.dat  enables  you  to use your specific disk drives with format(1M). On Solaris 2.3
       and compatible systems, format will automatically configure and label SCSI drives, so that
       they need not be defined in format.dat. Three things can be defined in the data file:

	   o	  search paths

	   o	  disk types

	   o	  partition tables.

       The following syntax rules apply to the data file:

	   o	  The  pound  #  sign  is the comment character. Any text on a line after a pound
		  sign is not interpreted by format.

	   o	  Each definition in the format.dat file appears on a single logical line. If the
		  definition  is more than one line long, all but the last line of the definition
		  must end with a backslash (\).

	   o	  A definition consists of a series of assignments that have an identifier on the
		  left	side and one or more values on the right side. The assignment operator is
		  the equal sign (=). Assignments within a definition  must  be  separated  by	a
		  colon (:).

	   o	  White  space is ignored by format(1M). If you want an assigned value to contain
		  white space, enclose the entire value in double quotes ("). This will cause the
		  white space within quotes to be preserved as part of the assignment value.

	   o	  Some assignments can have multiple values on the right hand side. Separate val-
		  ues by a comma (,).

       The data file contains disk definitions that are read in by format(1M) when it starts  up.
       Each  definition  starts  with  one of the following keywords: search_path, disk_type, and

       search_path    4.x: Tells format which disks it should search for when it starts  up.  The
		      list in the default data file contains all the disks in the GENERIC config-
		      uration file. If your system has disks that are not in the GENERIC configu-
		      ration  file, add them to the search_path definition in your data file. The
		      data file can contain only one search_path definition. However, this single
		      definition lets you specify all the disks you have in your system.

		      5.x: By default, format(1M) understands all the logical devices that are of
		      the form /dev/rdsk/cntndnsn; hence search_path is not normally defined on a
		      5.x system.

       disk_type      Defines  the  controller and disk model. Each disk_type definition contains
		      information concerning the physical geometry of the disk. The default  data
		      file  contains  definitions  for the controllers and disks that the Solaris
		      operating environment supports. You need to add a new disk_type only if you
		      have  an unsupported disk. You can add as many disk_type definitions to the
		      data file as you want.

		      The following controller types are supported by format(1M):

		      XY450	Xylogics 450 controller (SMD)

		      XD7053	Xylogics 7053 controller (SMD)

		      SCSI	True SCSI (CCS or SCSI-2)

		      ISP-80	IPI panther controller

		      The keyword itself is assigned the name of the disk type. This name appears
		      in  the  disk's  label  and is used to identify the disk type whenever for-
		      mat(1M) is run. Enclose the name in double quotes  to  preserve  any  white
		      space in the name.

		      Below  are  lists  of  identifiers  for supported controllers. Note that an
		      asterisk ('*') indicates the identifier is mandatory for that controller --
		      it is not part of the keyword name.

		      The following identifiers are assigned values in all disk_type definitions:

		      acyl*	  alternate cylinders

		      asect	  alternate sectors per track

		      atrks	  alternate tracks

		      fmt_time	  formatting time per cylinder

		      ncyl*	  number of logical cylinders

		      nhead*	  number of logical heads

		      nsect*	  number of logical sectors per track

		      pcyl*	  number of physical cylinders

		      phead	  number of physical heads

		      psect	  number of physical sectors per track

		      rpm*	  drive RPM

		      These identifiers are for SCSI and MD-21 Controllers

		      read_retries     page 1 byte 3 (read retries)

		      write_retries    page 1 byte 8 (write retries)

		      cyl_skew	       page 3 bytes 18-19 (cylinder skew)

		      trk_skew	       page 3 bytes 16-17 (track skew)

		      trks_zone        page 3 bytes 2-3 (tracks per zone)

		      cache	       page 38 byte 2 (cache parameter)

		      prefetch	       page 38 byte 3 (prefetch parameter)

		      max_prefetch     page 38 byte 4 (minimum prefetch)

		      min_prefetch     page 38 byte 6 (maximum prefetch)

		      Note: The Page 38 values are device-specific. Refer the user to the partic-
		      ular disk's manual for these values.

		      For SCSI disks, the following geometry specifiers may cause a  mode  select
		      on the byte(s) indicated:

		      asect    page 3 bytes 4-5 (alternate sectors per zone)

		      atrks    page 3 bytes 8-9 (alt. tracks per logical unit)

		      phead    page 4 byte 5 (number of heads)

		      psect    page 3 bytes 10-11 (sectors per track)

		      And these identifiers are for SMD Controllers Only

		      bps*    bytes per sector (SMD)

		      bpt*    bytes per track (SMD)

		      Note: under SunOS 5.x, bpt is only required for SMD disks. Under SunOS 4.x,
		      bpt was required for all disk types, even though it was only used  for  SMD

		      And this identifier is for XY450 SMD Controllers Only

		      drive_type*    drive type (SMD) (just call this "xy450 drive type")

       partition      Defines  a  partition  table  for a specific disk type. The partition table
		      contains the partitioning information, plus a name that lets you	refer  to
		      it  in format(1M). The default data file contains default partition defini-
		      tions for several kinds of disk drives. Add a partition definition  if  you
		      repartitioned  any of the disks on your system. Add as many partition defi-
		      nitions to the data file as you need.

		      Partition naming conventions differ in SunOS 4.x and in SunOS 5.x.

		      4.x: the partitions are named as a, b, c, d, e, f, g, h.

		      5.x: the partitions are referred to by numbers 0, 1, 2, 3, 4, 5, 6, 7.

       Example 1 A sample disk_type and partition.

       Following is a sample disk_type and partition definition in format.dat  file  for  SUN0535
       disk device.

	 disk_type = "SUN0535" \
	      : ctlr = SCSI : fmt_time = 4 \
	      : ncyl = 1866 : acyl = 2 : pcyl = 2500 : nhead = 7 : nsect = 80 \
	      : rpm = 5400
	 partition = "SUN0535" \
	      : disk = "SUN0535" : ctlr = SCSI \
	       : 0 = 0, 64400 : 1 = 115, 103600 : 2 = 0, 1044960 : 6 = 300, 876960

       /etc/format.dat	  default  data  file  if format -x is not specified, nor is there a for-
			  mat.dat file in the current directory.


       System Administration Guide: Basic Administration

SunOS 5.11				   19 Apr 2001				    format.dat(4)
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