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Diffstat (limited to 'Documentation/admin-guide/device-mapper/dm-zoned.rst')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/dm-zoned.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-zoned.rst b/Documentation/admin-guide/device-mapper/dm-zoned.rst index 07f56ebc1730..4165fbf1aeb6 100644 --- a/Documentation/admin-guide/device-mapper/dm-zoned.rst +++ b/Documentation/admin-guide/device-mapper/dm-zoned.rst @@ -144,3 +144,19 @@ underlying zoned block device name. Ex:: echo "0 `blockdev --getsize ${dev}` zoned ${dev}" | \ dmsetup create dmz-`basename ${dev}` + +Information about the internal layout and current usage of the zones can +be obtained with the 'status' callback from dmsetup: + +Ex:: + + dmsetup status /dev/dm-X + +will return a line + + 0 <size> zoned <nr_zones> zones <nr_unmap_rnd>/<nr_rnd> random <nr_unmap_seq>/<nr_seq> sequential + +where <nr_zones> is the total number of zones, <nr_unmap_rnd> is the number +of unmapped (ie free) random zones, <nr_rnd> the total number of zones, +<nr_unmap_seq> the number of unmapped sequential zones, and <nr_seq> the +total number of sequential zones. |