62 lines
1.6 KiB
Groff
62 lines
1.6 KiB
Groff
.\" @(#)dkctl.8 1.1 94/10/31 SMI
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.TH DKCTL 8 "17 June 1988"
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.SH NAME
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dkctl \- control special disk operations
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.SH SYNOPSIS
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.B /usr/etc/dkctl
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.I disk
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.I command
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.SH DESCRIPTION
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.IX "dkctl command" "" "\fLdkctl\fP \(em special disk operations"
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.IX disk "special operations" "" "\fLdkctl\fP \(em special disk operations"
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.B dkctl
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is used to enable or disable special disk operations. In particular the enabling
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or disabling of verified writes (write check functionality) is controlled
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by this program.
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.LP
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The
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.I disk
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specification here is a disk name of the form
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.IR /dev/rxxnp ,
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where
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.I xx
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is the controller device abbreviation (xy, sd, etc.),
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.I n
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is the disk number, and
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.I p
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is the partition to which the operation applies. The
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.I partition
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specification is simply
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the letter used to identify that partition in the standard
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.SM UNIX
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system nomenclature.
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.SH "SUPPORTED COMMANDS"
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.sp 0.2i
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.IP \fBwchk\fR 0.75i
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This function enables write checking for disks that support it for the named
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disk partition. This means that for partitions of disks with
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this feature enabled, all writes are
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.I verified
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to have been correctly written on the disk. This operation emphasizes data
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reliability over performance, although for each implementation, the fastest
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reasonable method will be used (i.e., implemented in hardware, if possible).
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.IP \fB\-wchk\fR 0.75i
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This disables write check functionality for the named disk partition.
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.SH BUGS
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.LP
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Use of the
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.B dkctl
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command requires super-user permissions.
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.LP
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There are many other features this program could control, and may in the
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future.
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.SH FILES
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.PD 0
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.TP 20
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.BI /dev/r xxnp
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.PD
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.SH "SEE ALSO"
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.BR dkio (4S),
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.BR sd (4S),
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.BR xy (4S)
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