Partition Types

Partition Types

Each partition has a type that is displayed by fx and prtvtoc. Table 1-2 lists the partition types, their uses, and the partition numbers that can be assigned to those types. (Partition 9 isn't listed in this table; remember that it is reserved.) Partition types, except for xlv, are assigned by fx. The type xlv is automatically assigned by several XLV logical volume commands.

Partition Types and Uses
Partition Type Partition Use Partitions That Can Be This Type
efs EFS filesystem 0, 6, 7 (standard partitions);
2, 3, 4, 5, 11, 12, 13, 14, 15 (custom partitions)
xfs XFS filesystem 0, 6, 7 (standard partitions);
2, 3, 4, 5, 11, 12, 13, 14, 15 (custom partitions)
xfslog External log for an XFS filesystem (part of an XLV log subvolume) 15 (standard partition);
0, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14 (custom partitions)
raw Swap space 1
volhdr Volume header 8
volume Entire volume, including the volume header 10
xlv Part of an XLV data or real-time subvolume 0, 1, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15 (partitions are changed to type xlv by XLV commands)
lvol Part of an lv logical volume 0, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15 (partitions are changed to type lvol by mklv)

Partition Types and Uses
Partition Type	Partition Use	Partitions That Can Be This Type
efs	EFS filesystem	0, 6, 7 (standard partitions); 2, 3, 4, 5, 11, 12, 13, 14, 15 (custom partitions)
xfs	XFS filesystem	0, 6, 7 (standard partitions); 2, 3, 4, 5, 11, 12, 13, 14, 15 (custom partitions)
xfslog	External log for an XFS filesystem (part of an XLV log subvolume)	15 (standard partition); 0, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14 (custom partitions)
raw	Swap space	1
volhdr	Volume header	8
volume	Entire volume, including the volume header	10
xlv	Part of an XLV data or real-time subvolume	0, 1, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15 (partitions are changed to type xlv by XLV commands)
lvol	Part of an lv logical volume	0, 2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15 (partitions are changed to type lvol by mklv)

The partitions listed as standard partitions in Table 1-2 are created when you use the fx repartition commands rootdrive, usrrootdrive, and optiondrive. Prompts ask you whether you want partition type efs or xfs, and, if you specify xfs for usrrootdrive or optiondrive, if you want an xfslog partition. To use an xfslog partition (an external XFS log), you must configure the xfslog partition as an XLV log subvolume. (See Chapter 7, "Creating and Administering XLV Logical Volumes," for more information about XLV.) If you do not use an xfslog partition, the XFS log is stored in an xfs partition (and called an internal log).

To assign a partition type to a partition number listed as a custom partition in Table 1-2, you must use the expert mode of fx (fx -x) to create the partition and assign the type. (See the fx(1M) reference page for more information about the expert mode of fx.)