idisk man page on HP-UX

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idisk(1M)							     idisk(1M)

       idisk - create partitions for disks on an Integrity system

       size] capacity]
	      partition_description_file}] device


       creates	operating  system partitions for disks on an Integrity system.
       It reads in the partition information from a  data  file	 that  may  be
       specified in the command string or redirected from stdin.

       By  default,  operates  in  read-only  mode  and displays the partition
       information that is currently on the  disk.   To	 write	new  partition
       information on the disk, the user must specify the option.

       recognizes the following options:

	      Print the primary EFI partition header and partition tables.

	      Print the alternate EFI partition header and partition tables.

	      Print the legacy partition table that resides in the master
		   boot	 record.   writes  partition information for the first
		   four partition in the partition table in used by legacy DOS
		   and	Windows.   This information is used as a backup in the
		   event all the EFI information is corrupted.

	      Print the first usable and last usable block numbers that
		   are available to create partitions.	First  usable  is  the
		   first  block	 a partition can start on.  Last usable is the
		   last block that can be contained  in	 a  partition.	 These
		   numbers are relative to the whole disk and do not take into
		   account any partitions that may exist.  They represent  the
		   total  disk	space that can be partitioned.	Use the option
		   to only print the values without headings.

	      Work silently.  No user prompts or warnings.  For use  in	 shell

	      Validate	EFI  partition	information.  Does the same checks the
	      driver does
		   verifying that both the primary and alternate EFI partition
		   headers  and	 tables are correct.  Returns two if either is
		   bad and zero if both are correct.

	      Restore the EFI  partition  headers  and	tables.	  This	option
	      checks both
		   the	primary header and tables and the alternate header and
		   tables.  If one is found bad it is restored from the	 other
		   good	 version.   One	 of  either  the  primary or alternate
		   header and tables must be good for this option to  succeed.
		   The	option must be specified for information to be written
		   to the disk.

	      The  partition_description_file contains the  number  of	parti‐
		   tions to be created and the type and requested size of each
		   partition.  The filename may be  specified  here  or	 redi‐
		   rected from stdin when the dash is used.

	      Enable write mode.  By default,
		   operates  in read-only mode.	 To create and write partition
		   information to the disk you must specify the option.

	      Specify alignment restriction for	 all  partitions.   Used  only
		   is  creating	 a new partition table.	 All partitions speci‐
		   fied in the partition description file will start on a mul‐
		   tiple  of  the  given  size	parameter  with respect to the
		   beginning of the disk.  The size parameter may carry a suf‐
		   fix	of 'K', 'M', or 'G' to represent kibibytes, mebibytes,
		   or gibibytes, respectively.

	      Extend HP-UX data partition.  Used when the  underlying  storage
	      has been
		   increased  in  size.	 Resizes the HP-UX data partition, and
		   relocates the HPSP to the end of  the  underlying  storage.
		   The	option must be specified for information to be written
		   to the disk.

	      Remove all EFI partition headers and tables from the disk.  This
		   also	 destroys the information contained in the MBR (master
		   boot record).  The option must be specified for information
		   to be written to the disk.

	      Override	the  capacity  of  the underlying storage device.  The
		   parameter is used instead of the detected capacity  of  the
		   device.   When  this	 option is given, will also bypass the
		   check requiring the device to be a raw device special file.
		   The	capacity  parameter may carry a suffix of 'K', 'M', or
		   'G'	to  represent  kibibytes,  mebibytes,  or   gibibytes,

   Partition Description File
       The first entry in the partition description file is the number of par‐
       titions to create.  The maximum number of  partitions  allowed  is  12.
       This is followed by a line containing the type and size for each of the

       Recognized partition types are: and

       The EFI (Extensible Firmware Interface) partition type is used for  the
       HP-UX  bootloader and other programs and data that are used to boot HP-
       UX.  The HPUX partition type is used as the storage area for  the  root
       volume group and swap/dump (the root VG and swap/dump space may include
       other storage, as well).	 The HPSP partition type is used  for  storage
       of offline firmware updates and diagnostics.  HPDUMP is deprecated.

       At  least one EFI partition is required to create a valid partition ta‐
       ble.  Size may be specified in megabytes or  as	a  percentage  of  the
       whole disk.

       Internally,  creates the partitions whose size is specified in MB first
       then creates those whose size was specified  as	a  percentage.	 Those
       partitions  specified  as  a  percent  are  assigned space from what is
       available after the MB partitions are created.  If the size of a parti‐
       tion is specified as 100%, then all space remaining is assigned to that

       may allocate slightly less space than requested for the	EFI  partition
       on  a disk containing both an EFI and an HP-UX data partition.  This is
       done to adjust the starting position of the  HP-UX  data	 partition  to
       align  to  common  RAID	stripe	sizes  (even on non-RAID disks).  This
       behavior may be prevented by adding the keyword 'EXACT' to the EFI par‐
       tition specification in the partition description file.

       An example partition description file is shown below:

       The first entry specifies the number of partitions to create.  The sec‐
       ond specifies an EFI partition of 100 megabytes.	 The last entry speci‐
       fies a HPUX partition consisting of all the remaining space on the disk
       after the EFI partition has been created.

       When creating partitions, the device file name  must  be	 that  of  the
       whole  disk.   Legacy  device  files must not have any partition number
       bits set in the minor number.  For legacy disk devices, the last	 eight
       bits of the minor number represent the option bits.

       For Integrity system disks, the last four option bits are used to indi‐
       cate the partition number.  Since there are only four bits  for	parti‐
       tion  number,  only one to fifteen partitions are supported.  For exam‐
       ple, a device node with a minor number of  0x008001  would  indicate  a
       disk at target eight, partition number one.  A minor number of 0x00500F
       would indicate a disk at target 5 partition fifteen.   A	 minor	number
       with  no partition bits set would indicate the whole disk (for example,
       0x008000 would be the same disk as above but represent the  whole  disk
       and not a partition).

       Persistent  device  special  files  do  not use or contain minor number
       information.  A detailed description on persistent device special files
       can be found in intro(7).  Note:	 For partitions created by device spe‐
       cial files must be created for each legacy hardware path	 to  the  disk
       and  for	 the  LUN  hardware path using or (see intro(7) for details on
       legacy and agile modes).	 If legacy mode is disabled (see the  descrip‐
       tion of the option in rmsf(1M)), device special files must only be cre‐
       ated for the LUN hardware path.

       has been ported to Windows NT 4.0 and 2000.

       Exit values are:

	  Successful completion.
	  Error condition occurred.

       Create the partitions specified in the above description file, printing
       only the primary partition information:

       Create the partitions specified in the above description file, printing
       only the primary partition information using a persistent  device  spe‐
       cial file (see intro(7)):

       Create the partitions specified in the above description file, printing
       all available information (default), redirecting input from stdin:

       Only read the disk, printing all tables (default) on the disk:

       Get the first and last usable block for partitioning on the disk:

       Destroy all partition information on the disk:

       Restore partition information from either a good primary	 or  alternate
       header or table to the header or table that is bad:

       Modify  an  existing partition table on a device whose storage capacity
       has increased, allocating the increased storage to HP-UX data:

       was developed by HP.

       insf(1M), mksf(1M), efi(4), intro(7).

			    Integrity Systems Only		     idisk(1M)

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