dk(4) - NetBSD Manual Pages

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DK(4)                   NetBSD Kernel Interfaces Manual                  DK(4)


NAME
dk -- disk partition (wedge) driver
SYNOPSIS
options DKWEDGE_AUTODISCOVER options DKWEDGE_METHOD_BSDLABEL options DKWEDGE_METHOD_GPT options DKWEDGE_METHOD_MBR options DKWEDGE_METHOD_RDB options DKWEDGE_METHOD_APPLE
DESCRIPTION
The dk driver provides a disk-like interface, or wedge, to an area of a physical disk. Wedges may be configured manually with dkctl(8) or auto- matically by the kernel upon the attachment of the physical disk. Wedges need to have unique names. If a duplicate name is detected during auto-discovery, that partition is ignored.
KERNEL OPTIONS
DKWEDGE_AUTODISCOVER Automatically detect and configure wedges using any available methods. Currently only DKWEDGE_METHOD_GPT and DKWEDGE_METHOD_APPLE are enabled by default. For each partition found, a wedge with a corre- sponding name is created. DKWEDGE_METHOD_BSDLABEL BSD disklabel detection method. For each con- figured partition in the disklabel(5) that is not of type FS_UNUSED, a wedge is created and named after the d_packname field followed by `/' and the partition letter `a'..`p'. When the d_packname is empty or has the value ``fictitious'', the regular partition names are used as wedge names, i.e. the device name, unit number and partition letter, for example ``wd0a''. DKWEDGE_METHOD_GPT Extensible Firmware Interface Globally Unique Identifier Partition Table (GPT) detection method. For every GPT partition a wedge is created and named after the partition label. GPT partitions are UTF-16-encoded, this is converted into UTF-8. If a partition has no label, its UUID is used instead. DKWEDGE_METHOD_MBR IBM PC-compatible Master Boot Record (MBR) par- titioning detection method, with support for Extended MBRs. For every partition in the MBR a wedge is cre- ated and named like a regular partition name, i.e. the device name, unit number and a parti- tion letter, for example ``wd0e''. Primary par- titions start with `e', extended partitions start with `i'. DKWEDGE_METHOD_RDB Amiga Rigid Disk Block (RDB) partitioning detec- tion method. DKWEDGE_METHOD_APPLE Apple partition map detection method.
FILES
/dev/{,r}dk* dk device special files.
SEE ALSO
config(1), disklabel(8), dkctl(8), fdisk(8), gpt(8), MAKEDEV(8)
HISTORY
The dk driver first appeared in NetBSD 3.0.
AUTHORS
The dk driver was written by Jason R. Thorpe. NetBSD 9.99 January 6, 2021 NetBSD 9.99
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