On Tue, Jun 06, 2017 at 01:57:27PM +1000, NeilBrown wrote:
> Had you run "mdadm --examine-bitmap /dev/sdk1" before the re-add, it
> would have told you how many bits were set at that time.
>
> That "x/y pages" information never should have appeared in /proc/mdstat
> - it is really just of interest to developers. But it is there now, so
> removing it is awkward.
So, I got the problem again, re-added a drive that had just been missing
for maybe 2mn, and this time I'm getting a very long (but not full)
recovery:
gargamel:~# mdadm --examine-bitmap /dev/sdh1
Filename : /dev/sdh1
Magic : 6d746962
Version : 4
UUID : 589f1176:8ee48905:d102340b:23f98ca1
Events : 11588
Events Cleared : 10625
State : OK
Chunksize : 64 MB
Daemon : 5s flush period
Write Mode : Normal
Sync Size : 1953380928 (1862.89 GiB 2000.26 GB)
Bitmap : 29807 bits (chunks), 267 dirty (0.9%)
0.9% dirty still gives me a 5H recovery?
md8 : active raid5 sdi1[5] sdd1[0] sdh1[3] sdg1[2] sdf1[1]
7813523712 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/4] [UUUU_]
[==>..................] recovery = 12.4% (243429660/1953380928) finish=297.6min speed=95741K/sec
bitmap: 5/15 pages [20KB], 65536KB chunk
gargamel:~# mdadm --query --detail /dev/md8
/dev/md8:
Version : 1.2
Creation Time : Sun May 14 08:59:13 2017
Raid Level : raid5
Array Size : 7813523712 (7451.56 GiB 8001.05 GB)
Used Dev Size : 1953380928 (1862.89 GiB 2000.26 GB)
Raid Devices : 5
Total Devices : 4
Persistence : Superblock is persistent
Intent Bitmap : Internal
Update Time : Tue Jun 20 11:01:02 2017
State : clean, degraded
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Name : gargamel.svh.merlins.org:8 (local to host gargamel.svh.merlins.org)
UUID : 589f1176:8ee48905:d102340b:23f98ca1
Events : 11588
Number Major Minor RaidDevice State
0 8 49 0 active sync /dev/sdd1
1 8 81 1 active sync /dev/sdf1
2 8 97 2 active sync /dev/sdg1
3 8 113 3 active sync /dev/sdh1
- 0 0 4 removed
This was the drive that got kicked out (shown before it was re-added):
gargamel:~# mdadm --examine-bitmap /dev/sdi1
Filename : /dev/sdi1
Magic : 6d746962
Version : 4
UUID : 589f1176:8ee48905:d102340b:23f98ca1
Events : 10630
Events Cleared : 10625
State : OK
Chunksize : 64 MB
Daemon : 5s flush period
Write Mode : Normal
Sync Size : 1953380928 (1862.89 GiB 2000.26 GB)
Bitmap : 29807 bits (chunks), 0 dirty (0.0%)
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/ | PGP 1024R/763BE901
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
