Specify that bootpath is to be used as the boot image, rather than the default of /boot/boot1.
Install bootstrap code onto the disk. Note that since the underlying hardware platform bootstraps from partitions, not disks, this operation is only useful if there is a partition starting at offset 0.
Use cylinders for partition size display rather than (512-byte) sectors. This also changes the default interpretation of the partition size entries when editing the label, or reading from a prototype file. Thus, prototype files are only compatible when both, obtaining the file and re-installing it is done using the same -c option setting.
Enter edit mode. See Edit mode below for a more detailed explanation.
When displaying the label, make the partition size and offset values "human readable". The displayed numbers will get a suffix of B for bytes, K for 1024 bytes each, M for 1048576 bytes each, or G for 1073741824 bytes each appended. Note that due to possible rounding errors, prototype files obtained using the -h option are not suited for re-installing using the -R option.
No changes. All operations, checks etc., are performed normally, but nothing is written to disk.
Obsolete option that used to indicate that the operation should be done directly on disk, as opposed through the respective kernel services. Ignored.
Restore label from the prototype in protofile. A prototype file is simply the textual representation of the label as printed using the first form of the sunlabel utility shown in the SYNOPSIS. Note that the -c option used to obtain the prototype must match the option used when restoring the label (both present, or both absent).
Write mode. Suitable to write an initial label to disk. The type argument used to be an entry into a table of predefined labels, but this functionality is not supported by sunlabel. Instead, the only allowable type argument is the string "auto", indicating that an automatically created label should be written to disk. This automatism will try to create an initial label that fits as best as possible into the available disk capacity.
If neither of the -e -, -R , or -w options are present, the existing label for disk will be printed to standard output.
The disk argument must be given as a plain disk name, without any leading /dev/.
The line represents the label text. It must be retained exactly in the form shown. The editable text XXXX is a simple (non-whitespace) text describing the disk. By convention, this text mentions the approximate size of the disk, as in "SUN9.0G" for a 9 GB disk shipped by Sun.
The values CC, HH, and SS describe the number of cylinders, heads (tracks per cylinder), and sectors per track respectively. They might be modified to change the geometry emulation. Each number must be between 1 and 65535. The product must be less than or equal to the total number of sectors of the disk (which is given as a hint in a comment field).
The volume name (if present) is introduced by the string ""volume name:"". It can be up to 8 characters long, and might be useful to distinguish different disks in a system. Note that volume names require the VTOC elements to be present, so any of the VTOC constraints described below need to be obeyed as well if a volume name is to be set. Setting an empty volume name will delete it from the label.
Partition entries start with a letter from a through h, immediately followed by a colon, followed by the size of this partition, and the starting cylinder of the partition. The unit of the size field defaults to sectors, or to cylinders if the -c option is in effect. Alternatively, a different unit may be specified by appending s for (512-byte) sectors, c for cylinders, k for kilobytes, m for megabytes, or g for gigabytes. The last partition entry may specify the size as * to indicate that this entry should consume the rest of disk not consumed by any other partition so far.
The start of partition is always taken as a cylinder number (starting at 0) since this is what the underlying hardware uses. Alternatively, specifying it as * will make the computation automatically chose the nearest possible cylinder boundary.
Partition c must always be present, must start at 0, and must cover the entire disk (without considering the alternate cylinders though).
Optionally, each partition entry may be followed by an SVR4-compatible VTOC tag name, and a flag description. The following VTOC tag names are known:
name value comment unassigned 0x00 boot 0x01 root 0x02 swap 0x03 usr 0x04 backup 0x05 c partition, entire disk stand 0x06 var 0x07 home 0x08 altsctr 0x09 alternate sector partition cache 0x0a Solaris cachefs partition VxVM_pub 0x0e VxVM public region VxVM_priv 0x0f VxVM private region
The following VTOC flags are known:
name value comment wm 0x00 read/write, mountable wu 0x01 read/write, unmountable rm 0x10 read/only, mountable ru 0x11 read/only, unmountable
Optionally, both the tag and/or the flag name may be specified numerically, using standard C numerial notation (prefix 0x for hexadecimal numbers, 0 for octal numbers). If the flag field is omitted, it defaults to wm. If the tag field is also omitted, it defaults to "unassigned". If none of the partitions lists any VTOC tag/flags, no SVR4-compatible VTOC elements will be written to disk. If VTOC-style elements are present, partition c must be marked as "backup" (and should be marked wu).
When checking the label, partition c is checked for presence, and for the mentioned restrictions. All other partitions are checked for possible overlaps, as well as for not extending past the end of unit. If VTOC-style elements are present, overlaps of unmountable partitions against other partitions will be warned still but do not cause a rejection of the label. That way, encapsulated disks of volume management software are acceptable as long as the volume management partitions are clearly marked as unmountable.
Any other fields in the label template are informational only, and will not be parsed when reading the label.
Note that when changing the geometry emulation by editing the textual description line, all partition entries will be considered based on the new geometry emulation.