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.TH DASDFMT 8 "Tue Jan 25 2000"
.UC 4
.SH NAME
dasdfmt \- formatting of DSAD (ECKD) disk drives.
.SH SYNOPSIS
\fBdasdfmt\fR [-tvyV] [-b \fIblockSize\fR] [\fIblockRange\fI]
\fIdiskSpec\fR
.SH DESCRIPTION
\fBdasdfmt\fR formats a DASD (ECKD) disk drive to prepare it
for usage with Linux for S/390. \fBWARNING\fR: Incautious usage of
\fBdasdfmt\fR can result in \fBLOSS OF DATA\fR.
.SH OPTIONS
.TP
\fB-t\fR
Disables any modification of the disk drive. \fBdasdfmt\fR just prints
out, what it \fBwould\fR do.
.TP
\fB-v\fR
Increases verbosity.
.TP
\fB-y\fR
Start formatting without further user-confirmation.
.TP
\fB-V\fR
Print version number and exit.
.TP
\fB-b\fR \fIblockSize\fR
Specify blocksize to be used. \fIblocksize\fR must be a positive integer
and always be a power of two. Due due some limitations in the driver,
it is \fBstrongly\fR recommended to use a \fIblockSize\fR of \fI4096\fR.
.TP
\fIblockRange\fR
This parameter specifies the number of the first and last block to be
formatted. If this parameter is \fBomitted\fR, formatting the \fBwhole\fR disk
is assumed. The \fIblockRange\fR can be specified in two different formats:
.sp
\fB-s\fR \fIstartBlock\fR \fB-e\fR \fIendBlock\fR
.br
or
.br
\fB-r\fR \fIstartBlock\fR-\fIendBlock\fR
.sp
If \fIstartBlock\fR is omitted, block \fB0\fR is assumed. If
\fIendBlock\fR is omitted, the last block of the disk is assumed.
.TP
\fIdiskSpec\fR
This parameter specified the device to be formatted. It also can be
given in two variants:
.sp
\fB-f\fR \fB/dev/dd\fR\fIX\fR
.br
or
.br
\fB-n\fR \fIdevnum\fR
.sp
The first form uses the commonly used
.SM UNIX
device notation where \fIX\fR is a single lowercase letter.
The second form uses simply the VM vdev number.
.SH BUGS
None so far ;-)
.SH AUTHOR
.nf
This man-page was written by Fritz Elfert <felfert@to.com>
.fi
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