34 lines
1 KiB
Markdown
34 lines
1 KiB
Markdown
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---
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obj: filesystem
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---
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# gmirror
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The gmirror utility is used for mirror ([RAID](../linux/filesystems/RAID.md)-1) configurations on [FreeBSD](FreeBSD.md). After a mirror's creation, all components are detected and configured automatically. All operations like failure detection, stale component detection, rebuild of stale components, etc. are also done automatically. The gmirror utility uses on-disk metadata (stored in the provider's last sector) to store all needed information. Since the last sector is used for this purpose, it is possible to place a root file system on a mirror.
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## Usage
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- Automatic Creation
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```shell
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gmirror label [-Fhnv] [-b balance] [-s slice] name prov ...
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```
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- Remove a device
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```shell
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gmirror forget [-v] name ... # Forget disconnected devices
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gmirror deactivate [-v] name prov ...
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gmirror remove [-v] name prov ...
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```
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- Destroy Mirror
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```shell
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gmirror destroy [-fv] name ...
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```
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- Clear metadata on device
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```shell
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gmirror clear [-v] prov ...
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```
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- Status of stripes
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```shell
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gmirror list
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gmirror status
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```
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