Date: Tue, 14 Jul 2020 23:04:47 +0200 From: Andrea Venturoli <ml@netfence.it> To: freebsd-questions@freebsd.org Subject: UFS dump bigger than expected Message-ID: <d9cbf20f-9c72-e0cd-6ce8-10510c4f40ab@netfence.it>
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Hello. I've got a problem with an UFS filesystem: dump produces a file which is bigger than I expect. # freebsd-version -ku 11.3-RELEASE-p10 11.3-RELEASE-p10 # uname -m amd64 # df -h -t ufs|grep usr /dev/mirror/gm0d 242G 199G 24G 89% /usr # cd /usr/ # du -x -d 0 -h 182G . # du -x -d 0 -n -h 9.2G . # /sbin/dump -0 -a -f /data/dumps/usr.dump -L -h 0 -u /usr DUMP: Date of this level 0 dump: Tue Jul 14 20:00:14 2020 DUMP: Date of last level 0 dump: the epoch DUMP: Dumping snapshot of /dev/mirror/gm0d (/usr) to /data/dumps/usr.dump DUMP: mapping (Pass I) [regular files] DUMP: mapping (Pass II) [directories] DUMP: estimated 27584621 tape blocks. DUMP: dumping (Pass III) [directories] DUMP: dumping (Pass IV) [regular files] DUMP: 4.18% done, finished in 1:54 at Tue Jul 14 22:02:57 2020 DUMP: 9.36% done, finished in 1:36 at Tue Jul 14 21:50:15 2020 DUMP: 16.19% done, finished in 1:17 at Tue Jul 14 21:36:01 2020 DUMP: 27.59% done, finished in 0:52 at Tue Jul 14 21:15:51 2020 DUMP: 43.59% done, finished in 0:32 at Tue Jul 14 21:00:43 2020 DUMP: 59.13% done, finished in 0:20 at Tue Jul 14 20:54:06 2020 DUMP: 68.72% done, finished in 0:15 at Tue Jul 14 20:54:17 2020 DUMP: 86.52% done, finished in 0:06 at Tue Jul 14 20:49:35 2020 DUMP: 96.40% done, finished in 0:01 at Tue Jul 14 20:50:02 2020 DUMP: DUMP: 27589206 tape blocks on 1 volume DUMP: finished in 2797 seconds, throughput 9863 KBytes/sec DUMP: level 0 dump on Tue Jul 14 20:00:14 2020 DUMP: Closing /data/dumps/usr.dump DUMP: DUMP IS DONE #ls -lh /data/dumps total 27596000 -rw-r--r-- 1 root wheel 26G Jul 14 20:49 usr.dump So, resuming, there's 182GB or 199GB of data here, but only 9.2GB of this should be dumped; the rest has the "nodump" flags active. However I end up with 26GB of dump! This machine has been there for something like five years and dump has always worked properly. The only thing I came up with, while searching the web, is:https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=111782 but this is a little different. Any hint? bye & Thanks av.
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