Copyright (c) 2006 The NetBSD Foundation, Inc.
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This code is derived from software contributed to The NetBSD Foundation
by Jason R. Thorpe.
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Jonathan A. Kollasch used vnd(4) as the template for this man page.
.Dd January 6, 2021 .Dt DK 4 .Os .Sh NAME .Nm dk .Nd disk partition
q wedge driver .Sh SYNOPSIS .Cd "options DKWEDGE_AUTODISCOVER" .Cd "options DKWEDGE_METHOD_BSDLABEL" .Cd "options DKWEDGE_METHOD_GPT" .Cd "options DKWEDGE_METHOD_MBR" .Cd "options DKWEDGE_METHOD_RDB" .Cd "options DKWEDGE_METHOD_APPLE" .Sh DESCRIPTION The .Nm driver provides a disk-like interface, or .Em wedge , to an area of a physical disk. Wedges may be configured manually with .Xr dkctl 8 or automatically by the kernel upon the attachment of the physical disk.
p Wedges need to have unique names. If a duplicate name is detected during auto-discovery, that partition is ignored. .Sh KERNEL OPTIONS l -tag -width DKWEDGE_METHOD_BSDLABEL t Dv DKWEDGE_AUTODISCOVER Automatically detect and configure wedges using any available methods.
p Currently only .Dv DKWEDGE_METHOD_GPT and .Dv DKWEDGE_METHOD_APPLE are enabled by default.
p For each partition found, a wedge with a corresponding name is created. t Dv DKWEDGE_METHOD_BSDLABEL BSD disklabel detection method. For each configured partition in the .Xr disklabel 5 that is not of type .Dv FS_UNUSED , a wedge is created and named after the .Va d_packname field followed by .Sq / and the partition letter .So a Sc Ns .. Ns So p Sc .
p When the .Va d_packname is empty or has the value .Dq fictitious , the regular partition names are used as wedge names, i.e. the device name, unit number and partition letter, for example .Dq wd0a . t Dv DKWEDGE_METHOD_GPT Extensible Firmware Interface Globally Unique Identifier Partition Table (GPT) detection method.
p 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. t Dv DKWEDGE_METHOD_MBR IBM PC-compatible Master Boot Record (MBR) partitioning detection method, with support for Extended MBRs.
p For every partition in the MBR a wedge is created and named like a regular partition name, i.e. the device name, unit number and a partition letter, for example .Dq wd0e . Primary partitions start with .Sq e , extended partitions start with .Sq i . t Dv DKWEDGE_METHOD_RDB Amiga Rigid Disk Block (RDB) partitioning detection method. t Dv DKWEDGE_METHOD_APPLE Apple partition map detection method. .El .Sh FILES l -tag -width /dev/XXrXdkX -compact t Pa /dev/{,r}dk* .Nm device special files. .El .Sh SEE ALSO .Xr config 1 , .Xr disklabel 8 , .Xr dkctl 8 , .Xr fdisk 8 , .Xr gpt 8 , .Xr MAKEDEV 8 .Sh HISTORY The .Nm driver first appeared in .Nx 3.0 . .Sh AUTHORS The .Nm driver was written by .An Jason R. Thorpe .
Indexes created Mon Oct 20 11:09:49 GMT 2025