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GSTRIPE(8)		  BSD System Manager's Manual		    GSTRIPE(8)

NAME
     gstripe --	control	utility	for striped devices

SYNOPSIS
     gstripe create [-v] [-s stripesize] name prov prov	[prov [...]]
     gstripe destroy [-fv] name	[name [...]]
     gstripe label [-hv] [-s stripesize] name prov prov	[prov [...]]
     gstripe stop [-fv]	name [name [...]]
     gstripe clear [-v]	prov [prov [...]]
     gstripe dump prov [prov [...]]
     gstripe list [name	[...]]
     gstripe load [-v]
     gstripe unload [-v]

DESCRIPTION
     The gstripe utility is used for setting up	stripe on two or more disks.
     The striped device	can be configured using	two different methods:
     "manual" or "automatic".  When using the "manual" method, no metadata are
     stored on the devices, so the striped device has to be configured by hand
     every time	it is needed.  The "automatic" method uses on-disk metadata to
     detect devices.  Once devices are labeled,	they will be automatically de-
     tected and	configured.

     The first argument	to gstripe indicates an	action to be performed:

     create   Set up a striped device from the given devices with specified
	      name.  This is the "manual" method.  The kernel module
	      geom_stripe.ko will be loaded if it is not loaded	already.

     label    Set up a striped device from the given devices with the speci-
	      fied name.  This is the "automatic" method, where	metadata are
	      stored in	every device's last sector.  The kernel	module
	      geom_stripe.ko will be loaded if it is not loaded	already.

     stop     Turn off existing	striped	device by its name.  This command does
	      not touch	on-disk	metadata!

     destroy  Same as stop.

     clear    Clear metadata on	the given devices.

     dump     Dump metadata stored on the given	devices.

     list     List all or the given currently configured devices.

     load     Load geom_stripe.ko kernel module.

     unload   Unload geom_stripe.ko kernel module.

     Additional	options:

     -f		    Force the removal of the specified striped device.

     -h		    Hardcode providers'	names in metadata.

     -s	stripesize  Specifies size of stripe block.

     -v		    Be more verbose.

SYSCTL VARIABLES
     The following sysctl(8) variables can be used to control the behavior of
     the STRIPE	GEOM class.  The default value is shown	next to	each variable.

     kern.geom.stripe.debug: 0
	     Debug level of the	STRIPE GEOM class.  This can be	set to a num-
	     ber between 0 and 3, both included.  If set to 0 minimal debug
	     information is printed, and if set	to 3 the maximum amount	of de-
	     bug information in	printed.

     kern.geom.stripe.fast: 1
	     If	set to a non-zero value	enable "fast mode" instead of the nor-
	     mal "economic mode".  Compared to "economic mode" "fast mode"
	     uses more memory, but it is much faster for smaller stripe	sizes.
	     If	enough memory cannot be	allocated STRIPE will fall back	to
	     "economic mode".

     kern.geom.stripe.maxmem: 1310720
	     Maximum amount of memory that can be consumed by "fast mode" (in
	     bytes).  This sysctl(8) variable is read-only and can only	be set
	     as	a tunable in loader.conf(5).

     kern.geom.stripe.fast_failed
	     How many times "fast mode"	failed because of insufficient amount
	     of	memory.	 If this value is big, you should considern increasing
	     kern.geom.stripe.maxmem value.

EXAMPLES
     The following example shows how to	set up striped device from four	disks
     for automatic configuration, create a file	system on it, and mount	it:

	   gstripe label -v -s 4096 data /dev/da0 /dev/da1 /dev/da2 /dev/da3
	   newfs /dev/stripe/data
	   mount /dev/stripe/data /mnt
	   [...]
	   umount /mnt
	   gstripe stop	data
	   gstripe unload

DIAGNOSTICS
     Exit status is 0 on success, and 1	if the command fails.

SEE ALSO
     geom(4), loader.conf(5), geom(8), mount(8), newfs(8), sysctl(8),
     umount(8),	vinum(8)

HISTORY
     The gstripe utility appeared in FreeBSD 5.3.

AUTHORS
     Pawel Jakub Dawidek <pjd@FreeBSD.org>

BSD				 May 21, 2004				   BSD

NAME | SYNOPSIS | DESCRIPTION | SYSCTL VARIABLES | EXAMPLES | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS

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