Update mdadm to 4.0
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Authored by der_eismann on Oct 19 2018, 7:00 PM.

Details

Reviewers

JoshStrobl

Group Reviewers

Triage Team

Commits

R2056:e429b3366713: Update mdadm to 4.0

Summary

Update mdadm from 3.3.4 to 4.0
This release adds support for journalled RAID5/6 and clustered
RAID1. It also includes support for IMSM 4k sector drives,
failfast and better documentation for journaled RAID.

Test Plan

Create a new RAID1 array

sysop@laptop ~/solbuild/mdadm $ sudo mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sda1 
mdadm: Note: this array has metadata at the start and
    may not be suitable as a boot device.  If you plan to
    store '/boot' on this device please ensure that
    your boot-loader understands md/v1.x metadata, or use
    --metadata=0.90
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.

Check progress

sysop@laptop ~/solbuild/mdadm $ cat /proc/mdstat 
Personalities : [raid1] 
md0 : active raid1 sda1[1] sdb1[0]
      3912704 blocks super 1.2 [2/2] [UU]
      [=>...................]  resync =  7.5% (297152/3912704) finish=104.5min speed=576K/sec
      
unused devices: <none>