diff options
Diffstat (limited to 'mdadm.8')
-rw-r--r-- | mdadm.8 | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -712,6 +712,7 @@ argument given to this flag can be one of .BR homehost , .BR resync , .BR byteorder , +.BR devicesize , or .BR super-minor . @@ -789,6 +790,22 @@ The option will correct the summaries in the superblock. That is the counts of total, working, active, failed, and spare devices. +The +.B devicesize +will rarely be of use. It applies to version 1.1 and 1.2 metadata +only (where the metadata is at the start of the device) and is only +useful when the component device has changed size (typically become +larger). The version 1 metadata records the amount of the device that +can be used to store data, so if a device in a version 1.1 or 1.2 +array becomes larger, the metadata will still be visible, but the +extra space will not. In this case it might be useful to assemble the +array with +.BR --update=devicesize . +This will cause +.I mdadm +to determine the maximum usable amount of space on each device and +update the relevant field in the metadata. + .TP .B --auto-update-homehost This flag is only meaning with auto-assembly (see discussion below). |