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30 .Nd "control utility for striped devices"
35 .Op Fl s Ar stripesize
45 .Op Fl s Ar stripesize
70 utility is used for setting up a stripe on two or more disks.
71 The striped device can be configured using two different methods:
77 method, no metadata are stored on the devices, so the striped
78 device has to be configured by hand every time it is needed.
81 method uses on-disk metadata to detect devices.
82 Once devices are labeled, they will be automatically detected and
87 indicates an action to be performed:
88 .Bl -tag -width ".Cm destroy"
90 Set up a striped device from the given devices with specified
94 method and the stripe will not exist after a reboot (see
99 will be loaded if it is not loaded already.
101 Set up a striped device from the given devices with the specified
105 method, where metadata are stored in every device's last sector.
108 will be loaded if it is not loaded already.
110 Turn off an existing striped device by its
112 This command does not touch on-disk metadata!
117 Clear metadata on the given devices.
119 Dump metadata stored on the given devices.
135 .Bl -tag -width ".Fl s Ar stripesize"
137 Force the removal of the specified striped device.
139 Hardcode providers' names in metadata.
140 .It Fl s Ar stripesize
141 Specifies size of stripe block in bytes.
144 must be a multiple of the largest sector size of all the providers.
151 variables can be used to control the behavior of the
154 The default value is shown next to each variable.
155 .Bl -tag -width indent
156 .It Va kern.geom.stripe.debug : No 0
160 This can be set to a number between 0 and 3 inclusive.
161 If set to 0 minimal debug information is printed, and if set to 3 the
162 maximum amount of debug information is printed.
163 .It Va kern.geom.stripe.fast : No 0
164 If set to a non-zero value enable
166 instead of the normal
167 .Dq "economic mode" .
169 .Dq "economic mode" ,
171 uses more memory, but it is much faster for smaller stripe sizes.
172 If enough memory cannot be allocated,
175 .Dq "economic mode" .
176 .It Va kern.geom.stripe.maxmem : No 13107200
177 Maximum amount of memory that can be consumed by
182 variable is read-only and can only be set as a tunable in
184 .It Va kern.geom.stripe.fast_failed
185 A count of how many times
187 has failed due to an insufficient amount of memory.
188 If this value is large, you should consider increasing the
189 .Va kern.geom.stripe.maxmem
193 Exit status is 0 on success, and 1 if the command fails.
195 The following example shows how to set up a striped device from four disks with a
196 128KB stripe size for automatic configuration,
197 create a file system on it,
199 .Bd -literal -offset indent
200 gstripe label -v -s 131072 data /dev/da0 /dev/da1 /dev/da2 /dev/da3
201 newfs /dev/stripe/data
202 mount /dev/stripe/data /mnt
211 interleave is in number of bytes,
214 which use the number of sectors.
220 is 64 KB (128 512B sectors).
221 The same stripe interleave would be specified as
241 .An Pawel Jakub Dawidek Aq Mt pjd@FreeBSD.org