Date: Fri, 11 Jan 2008 01:30:03 GMT From: Kyle Lanclos <lanclos@ucolick.org> To: freebsd-geom@FreeBSD.org Subject: Re: kern/113957: [gmirror] gmirror is intermittently reporting a degraded mirror array upon reboot. Message-ID: <200801110130.m0B1U3FS072915@freefall.freebsd.org>
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The following reply was made to PR kern/113957; it has been noted by GNATS.
From: Kyle Lanclos <lanclos@ucolick.org>
To: bug-followup@FreeBSD.org
Cc:
Subject: Re: kern/113957: [gmirror] gmirror is intermittently reporting a degraded mirror array upon reboot.
Date: Thu, 10 Jan 2008 16:55:06 -0800
I see the same behavior on a Sun X2100 M2 system with two 250GB SATA
drives. If I reboot the machine, it comes up with the first drive
in the mirror (ad4) degraded, and commences a re-synch. The percentage
varies somewhat, but it generally starts synch'ing at 0% complete.
I am running FreeBSD 7.0-RC1, 32-bit.
Similar to the behavior noted in the original submission, only the ad4
device (the one used to 'seed' this gm0 mirror) comes up dirty on reboot.
Unlike the original submission, I see this behavior every time I reboot,
not 20% of the time.
In each case, I reboot the machine by issuing the 'reboot' command,
as opposed to yanking the power cord from the back of the server. The
console messages at boot time indicate that all filesystems are clean.
Here is the relevant section from dmesg:
ad4: 238471MB <SEAGATE ST32500NSSUN250G 0741B59RT2 3AZQ> at ata2-master SATA300
ad6: 238471MB <SEAGATE ST32500NSSUN250G 0741B59RQJ 3AZQ> at ata3-master SATA300
SMP: AP CPU #1 Launched!
GEOM_MIRROR: Device mirror/gm0 launched (1/2).
GEOM_MIRROR: Device gm0: rebuilding provider ad4.
Trying to mount root from ufs:/dev/mirror/gm0s1a
Sample gmirror output:
# gmirror status
Name Status Components
mirror/gm0 DEGRADED ad4 (26%)
ad6
# gmirror list
Geom name: gm0
State: DEGRADED
Components: 2
Balance: load
Slice: 4096
Flags: NONE
GenID: 0
SyncID: 1
ID: 1395794316
Providers:
1. Name: mirror/gm0
Mediasize: 250055999488 (233G)
Sectorsize: 512
Mode: r8w7e8
Consumers:
1. Name: ad4
Mediasize: 250056000000 (233G)
Sectorsize: 512
Mode: r1w1e1
State: SYNCHRONIZING
Priority: 0
Flags: DIRTY, SYNCHRONIZING
GenID: 0
SyncID: 1
Synchronized: 26%
ID: 1222153146
2. Name: ad6
Mediasize: 250056000000 (233G)
Sectorsize: 512
Mode: r1w1e1
State: ACTIVE
Priority: 0
Flags: NONE
GenID: 0
SyncID: 1
ID: 1772037181
The mirror was established via the following set of operations:
gmirror label -v -b load gm0 /dev/ad4
echo geom_mirror_load=YES >> /boot/loader.conf
# Revise all instances of /dev/ad4 to /dev/mirror/gm0 in /etc/fstab.
reboot
gmirror insert gm0 /dev/ad6
Please let me know if there is any additional information I can provide.
--Kyle
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