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32 .Nd "control utility for striped devices"
37 .Op Fl s Ar stripesize
47 .Op Fl s Ar stripesize
72 utility is used for setting up a stripe on two or more disks.
73 The striped device can be configured using two different methods:
79 method, no metadata are stored on the devices, so the striped
80 device has to be configured by hand every time it is needed.
83 method uses on-disk metadata to detect devices.
84 Once devices are labeled, they will be automatically detected and
89 indicates an action to be performed:
90 .Bl -tag -width ".Cm destroy"
92 Set up a striped device from the given devices with specified
96 method and the stripe will not exist after a reboot (see
101 will be loaded if it is not loaded already.
103 Set up a striped device from the given devices with the specified
107 method, where metadata are stored in every device's last sector.
110 will be loaded if it is not loaded already.
112 Turn off an existing striped device by its
114 This command does not touch on-disk metadata!
119 Clear metadata on the given devices.
121 Dump metadata stored on the given devices.
137 .Bl -tag -width ".Fl s Ar stripesize"
139 Force the removal of the specified striped device.
141 Hardcode providers' names in metadata.
142 .It Fl s Ar stripesize
143 Specifies size of stripe block in bytes.
146 must be a multiple of the largest sector size of all the providers.
153 variables can be used to control the behavior of the
156 The default value is shown next to each variable.
157 .Bl -tag -width indent
158 .It Va kern.geom.stripe.debug : No 0
162 This can be set to a number between 0 and 3 inclusive.
163 If set to 0 minimal debug information is printed, and if set to 3 the
164 maximum amount of debug information is printed.
165 .It Va kern.geom.stripe.fast : No 0
166 If set to a non-zero value enable
168 instead of the normal
169 .Dq "economic mode" .
171 .Dq "economic mode" ,
173 uses more memory, but it is much faster for smaller stripe sizes.
174 If enough memory cannot be allocated,
177 .Dq "economic mode" .
178 .It Va kern.geom.stripe.maxmem : No 13107200
179 Maximum amount of memory that can be consumed by
184 variable is read-only and can only be set as a tunable in
186 .It Va kern.geom.stripe.fast_failed
187 A count of how many times
189 has failed due to an insufficient amount of memory.
190 If this value is large, you should consider increasing the
191 .Va kern.geom.stripe.maxmem
195 Exit status is 0 on success, and 1 if the command fails.
197 The following example shows how to set up a striped device from four disks with a
198 128KB stripe size for automatic configuration,
199 create a file system on it,
201 .Bd -literal -offset indent
202 gstripe label -v -s 131072 data /dev/da0 /dev/da1 /dev/da2 /dev/da3
203 newfs /dev/stripe/data
204 mount /dev/stripe/data /mnt
213 interleave is in number of bytes,
216 which use the number of sectors.
222 is 64 KB (128 512B sectors).
223 The same stripe interleave would be specified as
243 .An Pawel Jakub Dawidek Aq pjd@FreeBSD.org