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Diffstat (limited to 'Documentation/ABI/testing/sysfs-block')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-block | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index c1eb41cb9876..2b5d56127fce 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -206,3 +206,16 @@ Description: when a discarded area is read the discard_zeroes_data parameter will be set to one. Otherwise it will be 0 and the result of reading a discarded area is undefined. +What: /sys/block/<disk>/alias +Date: Aug 2011 +Contact: Nao Nishijima <nao.nishijima.xt@hitachi.com> +Description: + A raw device name of a disk does not always point a same disk + each boot-up time. Therefore, users have to use persistent + device names, which udev creates when the kernel finds a disk, + instead of raw device name. However, kernel doesn't show those + persistent names on its messages (e.g. dmesg). + This file can store an alias of the disk and it would be + appeared in kernel messages if it is set. A disk can have an + alias which length is up to 255bytes. Users can use alphabets, + numbers, "-" and "_" in alias name. This file is writeonce. |