diff options
Diffstat (limited to 'Documentation/md.txt')
| -rw-r--r-- | Documentation/md.txt | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt index 0668f9dc9d29..9ae9e4078985 100644 --- a/Documentation/md.txt +++ b/Documentation/md.txt @@ -154,11 +154,12 @@ contains further md-specific information about the device. All md devices contain: level - a text file indicating the 'raid level'. This may be a standard - numerical level prefixed by "RAID-" - e.g. "RAID-5", or some - other name such as "linear" or "multipath". + a text file indicating the 'raid level'. e.g. raid0, raid1, + raid5, linear, multipath, faulty. If no raid level has been set yet (array is still being - assembled), this file will be empty. + assembled), the value will reflect whatever has been written + to it, which may be a name like the above, or may be a number + such as '0', '5', etc. raid_disks a text file with a simple number indicating the number of devices @@ -192,14 +193,6 @@ All md devices contain: 1.2 (newer format in varying locations) or "none" indicating that the kernel isn't managing metadata at all. - level - The raid 'level' for this array. The name will often (but not - always) be the same as the name of the module that implements the - level. To be auto-loaded the module must have an alias - md-$LEVEL e.g. md-raid5 - This can be written only while the array is being assembled, not - after it is started. - layout The "layout" for the array for the particular level. This is simply a number that is interpretted differently by different @@ -410,6 +403,15 @@ also have than sectors, this my be larger than the number of actual errors by a factor of the number of sectors in a page. + bitmap_set_bits + If the array has a write-intent bitmap, then writing to this + attribute can set bits in the bitmap, indicating that a resync + would need to check the corresponding blocks. Either individual + numbers or start-end pairs can be written. Multiple numbers + can be separated by a space. + Note that the numbers are 'bit' numbers, not 'block' numbers. + They should be scaled by the bitmap_chunksize. + Each active md device may also have attributes specific to the personality module that manages it. These are specific to the implementation of the module and could |