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GSTRIPE(8)              FreeBSD 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 detected 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
                  specified 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
             number between 0 and 3, both included.  If set to 0 minimal debug
             information is printed, and if set to 3 the maximum amount of
             debug information in printed.

     kern.geom.stripe.fast: 1
             If set to a non-zero value enable ``fast mode'' instead of the
             normal ``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>

FreeBSD 11.0-PRERELEASE          May 21, 2004          FreeBSD 11.0-PRERELEASE

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

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