Bug #8617
zpool scrub disappears when taking a disk online
Status:
New
Priority:
Normal
Assignee:
-
Category:
zfs - Zettabyte File System
Start date:
2017-09-06
Due date:
% Done:
0%
Estimated time:
Difficulty:
Medium
Tags:
needs-triage
Description
Recently I was wondering why a zfs scrub disappeared without any error. It turns out I took an offline disk online again.
I wrote a little reproducer (see attachment):
[host ~]# /var/tmp/zpool-scrub-reproducer.sh
zpool status pol.s | egrep 'scrub|scan|resilver'
scan: resilvered 512 in 0h0m with 0 errors on Wed Sep 6 11:38:21 2017
zpool scrub pol.s
zpool status pol.s | egrep 'scrub|scan|resilver'
scan: scrub in progress since Wed Sep 6 11:39:11 2017
210M scanned out of 40.8T at 17.5M/s, 678h24m to go
zpool offline pol.s c3t5000C5001A4DCB6Ed0
zpool status pol.s | egrep 'scrub|scan|resilver'
scan: scrub in progress since Wed Sep 6 11:39:11 2017
332M scanned out of 40.8T at 15.8M/s, (scan is slow, no estimated time)
zpool online pol.s c3t5000C5001A4DCB6Ed0
zpool status pol.s | egrep 'scrub|scan|resilver'
scan: resilvered 512 in 0h0m with 0 errors on Wed Sep 6 11:39:37 2017
I'm not quite sure if this is a bug or if there are some good reasons for this behaviour. Maybe someone can clarify it.
Files
History
Updated by 
Updated by
Updated by Yuri Pankov about 2 years ago
and this is really better asked on mailing lists, this doesn't look like problem report per se.
Updated by Simon Klinkert about 2 years ago
Yuri Pankov wrote:
resilver overrides scrub?
Hm yes, you might be right. Maybe a scrub should continue after resilver. Especially if the scrub needs days or even worse weeks and the resilver for a single disk needs only minutes/hours.