Date: Sun, 21 Feb 2010 06:12:51 +0000 From: Bartosz Fabianowski <bartosz@fabianowski.eu> To: freebsd-geom@freebsd.org Subject: gjournal failing to do its job Message-ID: <4B80CEE3.80909@fabianowski.eu>
next in thread | raw e-mail | index | archive | help
Good day I recently set up a brand new 8-STABLE box with UFS2 + gjournal. After a hang and hard reboot, I noticed that the setup is not working. File systems came up inconsistent without the system even noticing. I had to manually run fsck in single user mode to get back to a consistent state. The setup is nested as follows: Drive: ada0 Slice (MBR partition): ada0s2 geli full drive encryption: ada0s2.eli gjournal: ada0s2.eli.journal bsdlabel: ada0s2.eli.journala - ada0s2.eli.journalg Partitions a, d, e, f and g are UFS2 file systems. Partition b is swap. As the hard drive is fully encrypted, the system boots off a USB key containing the boot loader, kernel and fstab. In the fstab, file systems are addressed by their volume labels and swap by a label set with glabel. As it appeared gjournal was working fine, I had set the gjournal flag on all UFS2 file systems and mounted them async. After the crash and reboot, gjournal reported "consistent" state. Then, a message informed me that / had not been unmounted cleanly and fsck ran on that one file system. For the other file systems (located in partitions d, e, f and g above), I got no messages of any sort. However, once the system was up, they were clearly inconsistent. A manual fsck run revealed serious inconsistencies such as unallocated inodes. The journal had clearly failed to do its job. Could anyone point me to what I am doing wrong? I know I have nested several GEOM providers inside each other. I was under the impression this was the very concept behind GEOM. Is it that I cannot have a single journal with multiple bsdlabel partitions inside? Again, it would seem GEOM allows this - and I have found mailing list messages suggesting others have done this before. On a related note, it would appear that there is no way to verify gjournal is actually active on a file system. I can set the journaling flag on any UFS2 partition - whether gjournal actually works or not. Is there some way to ensure that all file systems with journaling flag set are actually journaled? The "gjournal list" command tells me that ada0s2.eli is a provider and ada0s2.eli.journal a consumer. But are all bsdlabel partitions inside the consumer covered as well? There seems to be no tool that can tell me that. I am hoping someone on the list can shed some light on this. As a stop-gap measure, I have enabled softupdates on the file systems and removed the async flags from my fstab. I really would like to use journaling though - if I can find a way to enable it and make sure it is actually working. Thanks, - Bartosz Fabianowski
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4B80CEE3.80909>