Still problems with ddf stuff
From: Albert Pauw <hidden>
Date: 2012-08-18 09:29:16
Hi Neil,
looks like the layered raidsets problem is fixed, but still find
problems in the ddf code, here is the story below how to reproduce
the behaviour.
Hope you've got some time to look into this.
Kind regards,
Albert
---
Created a container with 5 disks two raid sets,
md0 /dev/loop[1-3]
md1 /dev/loop[4-5]
Physical Disks : 5
Number RefNo Size Device Type/State
0 f104844b 479232K /dev/loop1 active/Online
1 6c6570f4 479232K /dev/loop2 active/Online
2 b811fafe 479232K /dev/loop3 active/Online
3 80f7c2da 479232K /dev/loop4 active/Online
4 997126a7 479232K /dev/loop5 active/Online
Fail /dev/loop1 in md0
Remove /dev/loop1 from md127
Physical Disks : 5
Number RefNo Size Device Type/State
0 f104844b 479232K active/Offline,
Failed, Missing
1 6c6570f4 479232K /dev/loop2 active/Online
2 b811fafe 479232K /dev/loop3 active/Online
3 80f7c2da 479232K /dev/loop4 active/Online
4 997126a7 479232K /dev/loop5 active/Online
Add /dev/loop1 back to md127
Physical Disks : 5
Number RefNo Size Device Type/State
0 6c6570f4 479232K /dev/loop2 active/Online
1 b811fafe 479232K /dev/loop3 active/Online
2 80f7c2da 479232K /dev/loop4 active/Online
3 997126a7 479232K /dev/loop5 active/Online
4 131e04ea 479232K /dev/loop1 active/Online, Rebuilding
Status ok again
Physical Disks : 5
Number RefNo Size Device Type/State
0 6c6570f4 479232K /dev/loop2 active/Online
1 b811fafe 479232K /dev/loop3 active/Online
2 80f7c2da 479232K /dev/loop4 active/Online
3 997126a7 479232K /dev/loop5 active/Online
4 131e04ea 479232K /dev/loop1 active/Online
Add spare /dev/loop6
Physical Disks : 6
Number RefNo Size Device Type/State
0 6c6570f4 479232K /dev/loop2 active/Online
1 b811fafe 479232K /dev/loop3 active/Online
2 80f7c2da 479232K /dev/loop4 active/Online
3 997126a7 479232K /dev/loop5 active/Online
4 131e04ea 479232K /dev/loop1 active/Online
5 d6f2c7b4 479232K /dev/loop6 Global-Spare/Online
Fail /dev/loop2 in /dev/md0, rebuild is with /dev/loop6 as expected,
but /dev/loop2 is gone now from the list
Physical Disks : 5
Number RefNo Size Device Type/State
0 b811fafe 479232K /dev/loop3 active/Online
1 80f7c2da 479232K /dev/loop4 active/Online
2 997126a7 479232K /dev/loop5 active/Online
3 131e04ea 479232K /dev/loop1 active/Online
4 d6f2c7b4 479232K /dev/loop6 active/Online, Rebuilding
Fail /dev/loop5, rebuild is done with /dev/loop2, which had been
marked failed, and
disappeared at the previous action from the table. It is not visible here, but
Number RefNo Size Device Type/State
0 b811fafe 479232K /dev/loop3 active/Online, Rebuilding
1 80f7c2da 479232K /dev/loop4 active/Online
2 131e04ea 479232K /dev/loop1 active/Online
3 d6f2c7b4 479232K /dev/loop6 active/Online, Rebuilding
cat /proc/mdstat shows that /dev/loop2 is used again.
Personalities : [raid6] [raid5] [raid4] [raid1]
md1 : active raid1 loop2[2] loop4[0]
479232 blocks super external:/md127/1 [2/1] [U_]
[======>..............] recovery = 34.4% (165568/479232)
finish=0.8min speed=5913K/sec
md0 : active raid5 loop6[4] loop1[3] loop3[2]
958464 blocks super external:/md127/0 level 5, 512k chunk,
algorithm 2 [3/2] [U_U]
[===================>.] recovery = 97.3% (467180/479232)
finish=0.0min speed=3407K/sec
md127 : inactive loop6[5](S) loop1[0](S) loop5[4](S) loop4[3](S)
loop3[2](S) loop2[1](S)
196608 blocks super external:ddf