Hi all
Now there is a customer request to add Added time in mdadm -E.
For example:
# mdadm --examine /dev/sdb1 |pr -tn
1 /dev/sdb1:
2 Magic : a92b4efc
3 Version : 1.2
4 Feature Map : 0x0
5 Array UUID : 4c22baaf:1bedd35e:ee135a1e:6ec770b8
6 Name : eveba16.wob.vw.vwg:0
7 Creation Time : Mon Mar 16 16:32:29 2015
8 Raid Level : raid6
9 Raid Devices : 8
10
11 Avail Dev Size : 11720779776 (5588.90 GiB 6001.04 GB)
12 Array Size : 35162336256 (33533.42 GiB 36006.23 GB)
13 Used Dev Size : 11720778752 (5588.90 GiB 6001.04 GB)
14 Data Offset : 262144 sectors
15 Super Offset : 8 sectors
16 Unused Space : before=261864 sectors, after=1024 sectors
17 State : clean
18 Device UUID : c013f194:536952b4:d7d21574:4469a58d
19
20 Update Time : Thu Sep 6 11:01:57 2018
ADD HERE: Device Added Time: Aug 15 12:13:14 2017 <-----------------------------------
He can know when the disk is added through this item. If adding this item into
superblock, it needs to add a new super block version. Now the super1 block version
is 1.0 1.1 and 1.2. Maybe it needs to add 1.3 for this. Is it the right way to do
this? If using a new feature flag, it needs to specify a specific argument when
creating raid device. I'm not sure which way is better, or both are wrong?
Best Regards
Xiao
