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mdoc(7) police: markup overhaul.

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Approved by:	re
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Ruslan Ermilov 2002-12-12 14:36:08 +00:00
parent 4ac17494d7
commit a7348c92db
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=107781
1 changed files with 45 additions and 40 deletions
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share/examples/scsi_target/scsi_target.8
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@ -40,17 +40,19 @@
.Op Fl c Ar size
.Op Fl s Ar size
.Op Fl W Ar num
.Ar bus:target:lun
.Ar bus : Ns Ar target : Ns Ar lun
.Ar filename
.Sh DESCRIPTION
The
.Nm
program emulates a SCSI target device using the
utility emulates a SCSI target device using the
.Xr targ 4
device driver. It supports the basic commands of a direct access device, like
device driver.
It supports the basic commands of a direct access device, like
.Xr da 4 .
In typical operation, it opens a control device and
enables target mode for the specified LUN. It then communicates with
enables target mode for the specified LUN.
It then communicates with
the SIM using CCBs exchanged via
.Xr read 2
and
@ -61,78 +63,81 @@ For performance, all backing store accesses use
.Xr aio 4 .
Thus,
.Nm
requires a kernel compiled with "options VFS_AIO".
requires a kernel compiled with
.Cd "options VFS_AIO" .
.Pp
Options:
.Pp
.Bl -tag -width XXXXXXXXXXXXXX
.Bl -tag -width indent
.It Fl A
Enable 16 addresses if supported by the SIM. Default is 8.
Enable 16 addresses if supported by the SIM.
Default is 8.
.It Fl S
Enable synchronous transfers if supported by the SIM. Default is disabled.
Enable synchronous transfers if supported by the SIM.
Default is disabled.
.It Fl T
Enable tagged queuing if supported by the SIM. Default is no tagged
queuing.
.It Fl W Ar "8,16,32"
Enable 16 or 32 bit wide transfers if supported by the SIM. Default is 8.
Enable tagged queuing if supported by the SIM.
Default is no tagged queuing.
.It Fl W Cm 8 | 16 | 32
Enable 16 or 32 bit wide transfers if supported by the SIM.
Default is 8.
.It Fl b Ar bufsize
Set buffer size for transfers. Transfers larger than this will be split
into multiple transfers.
Set buffer size for transfers.
Transfers larger than this will be split into multiple transfers.
.It Fl c Ar sectorsize
Set sector size for emulated volume. Default is 512.
Set sector size for emulated volume.
Default is 512.
.It Fl d
Enable debugging output in
.Nm
and its associated control device.
.It Fl s Ar volsize
Use a different size for the emulated volume. Must be less than or equal
to the size of
Use a different size for the emulated volume.
Must be less than or equal to the size of
.Ar filename .
.El
.Pp
Required arguments:
.Bl -tag -width XXXXXXXXXXXXXX
.It Ar bus:target:lun
Attach to specified bus id, target id, and lun.
.Bl -tag -width indent
.It Ar bus : Ns Ar target : Ns Ar lun
Attach to specified bus ID, target ID, and LUN.
.It Ar filename
file to use as a backing store
File to use as a backing store.
.El
.Pp
All options default to the minimal functionality of SCSI-1.
To be safe,
.Nm
checks the SIM for the requested capability before enabling target mode.
.Sh EXAMPLE
.Sh EXAMPLES
Create a 5 megabyte backing store file.
.Bd -literal
# dd if=/dev/zero of=vol size=1m count=5
.Ed
.Pp
Enable target mode on bus 0, target id 1, lun 0, using
.Ar vol
.Dl "dd if=/dev/zero of=vol size=1m count=5"
.Pp
Enable target mode on bus 0, target ID 1, LUN 0, using
.Pa vol
as the backing store for READ6/10 and WRITE6/10 commands.
Only the first 1000 bytes of
.Ar vol
will be used. Debugging information will be output.
Only the first 1000 bytes of
.Pa vol
will be used.
Debugging information will be output.
16-bit wide transfers will be used if the SIM supports them.
.Pp
.Bd -literal
# scsi_target -d -v 1000 -W 16 0:1:0 vol
.Ed
.Dl "scsi_target -d -v 1000 -W 16 0:1:0 vol"
.Sh FILES
.Bl -tag -width /usr/share/examples/scsi_target -compact
.Bl -tag -width ".Pa /usr/share/examples/scsi_target" -compact
.It Pa /dev/targ*
are the control devices.
Control devices.
.It Pa /usr/share/examples/scsi_target
is the source directory.
Source directory.
.El
.Sh SEE ALSO
.Xr targ 4 ,
.Xr scsi 4
.Xr scsi 4 ,
.Xr targ 4
.Sh AUTHORS
.An -nosplit
The
.Nm
example first appeared in
example first appeared in
.Fx 3.0
and was written by
.An Justin T. Gibbs .