Strange or unexpected disk activity after issuing "sync".
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, Doing experiments while investigating a problem, I noticed that the command "sync", which flushes disk caches from memory to disk, took long (minutes?) to sync. But wait. I also noticed looking at "atop", that one disk, and one disk only of the five I have, goes 100% busy at that point (sdc) And then I noticed, running gkrellm with one chart per partition of that disk that it is only one partition which is writing a lot of stuff, slowly at about 250 KBps, for a time that can be half a minute or probably minutes (I'm still investigating). What is that partition? Well, for one thing it is the only reiserfs partition I still have: fstab entries: LABEL=c_data_reiser /data/Lareiserfs reiserfs acl,user_xattr,barrier=flush,lazytime 1 3 /data/Lareiserfs/var_spool_news /var/spool/news none bind 0 0 And for another, it contains "/var/spool/news", which is used by my nntp news proxy "leafnode". My guess is that the partition delays writing of stuff to the disk for perhaps hours. The news store contains more than a million of small files in 3 GiB, one file per message. And very scattered. Could "lazytime" be involved in this behavior? - -- Cheers Carlos E. R. (from 15.2 x86_64 at Telcontar) -----BEGIN PGP SIGNATURE----- iHoEARECADoWIQQZEb51mJKK1KpcU/W1MxgcbY1H1QUCYFCnvBwccm9iaW4ubGlz dGFzQHRlbGVmb25pY2EubmV0AAoJELUzGBxtjUfVGfAAoICgtJ9AfaTRmxFq5Vjb RcNnQg6qAJwNQMHLPGWeljXlIECpjR3qfxCe5w== =VJ0e -----END PGP SIGNATURE-----
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Carlos E. R.