Date: Thu, 15 Dec 2016 05:51:54 +1100 From: Peter Jeremy <peter@rulingia.com> To: Dirk-Willem van Gulik <dirkx@webweaving.org> Cc: FreeBSD Hackers <hackers@freebsd.org> Subject: Re: ZFS - directory entry Message-ID: <20161214185154.GT61036@server.rulingia.com> In-Reply-To: <BEAC6EE9-C50F-4FB9-B215-D5A6691E2DD9@webweaving.org> References: <BEAC6EE9-C50F-4FB9-B215-D5A6691E2DD9@webweaving.org>
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--brEuL7wsLY8+TuWz Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2016-Dec-14 16:27:00 +0100, Dirk-Willem van Gulik <dirkx@webweaving.org>= wrote: >A rather odd directory entry (in /root, the home dir of root/toor) appeare= d on a bog standard FreeBSD 10.2 (p18) lightly loaded machine under ZFS dur= ing/post a backup: > >$ ls -la /root | tail -q >---------- 1 root wheel 9223372036854775807 Jan 1 1970 ?%+?kD?H???x,= ?5?Dh;*s!?h???jw??????\h?:????????``?13?@?????OA????????Puux????<T]???R??Qv= ?g???]??%?R? > >OS and ZFS is installed with a bog standard sysinstall. =E2=80=98SMART=E2= =80=99 nor smartd have reported anything. nothing in dmesg, syslog of boot = log. Any suggestions as how to debug or get to the root of this ?=20 > >And in particular - what is a risk of a reboot (to get a kernel with debug= , etc) causing the issue to =E2=80=98go away=E2=80=99 - and hence stopping = the forensic ? Do you have ECC RAM? If not, it's possible this is an artifact of some RAM corruption, rather than on-disk corruption. I'm surprised by the slow scrub, though they are very slow disks. You might like to use gstat or zpool iostat to see if one of the disks is slower than the others - indicating a possible problem with it. --=20 Peter Jeremy --brEuL7wsLY8+TuWz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQJ8BAEBCgBmBQJYUZTKXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFRUIyOTg2QzMwNjcxRTc0RTY1QzIyN0Ux NkE1OTdBMEU0QTIwQjM0AAoJEBall6Dkogs0uCAP/jUkIaHMEwy3k+CobYxtos/s dkPG6cuxfgts47LJDDOd4K9P+8m946JDT6b1Pfia/KncSPZL/x86ie7gtTpCl6x5 TUC47FNXQlQKSjlw59p+3/lbYY/XTAfEWbL3QOR7A0vPc3Hie/uHsoco2WUxfAMF V56FVYYIqV8Qh68iw3VW0WDxqwMrkdXFc6+Lqdwqx5jMX9NEd5z965+0yH87blW/ 3nnghOfMSiiOiKJkC3M0vd2oposoAxXoPWuRc05Acd6fWV5Q9bLkl3HSMbRc4rnO Mt+ycBtCB+Kv4Pdw5G0N91DtS3V/5m0MTGS/7Bl7/0OMvz0XzKU95EvauZzovgXR nRzbMWRfcG08ejT+uHLxKXraXBLR8HYJb7NW6KoKA8ZF2CJszzb3qtNgFkyjvroR VLJq6pp6VXk3eutC9arPIdFH/16324FFCqY0xZ9+a3ErjMv2vTG4NWHzcZOHOM2S pAq0Ezg5RMqUWJ9EcEEsBFgE/GcCc+w0GohWrl85ufQIaZcgBhm7Dvwxj7kEvGwx /2uFpnnj2ub41gcxvYJPwGib86Hkofrqb7859MdHXfeEUjapHv725yIEN6HZIAqE tt52UpOGHXwHWWComvM6nZPpCnU8VG/DADBGvlqInD747ecdiLeVxhROkc9aitj2 wP3wiEDPb8rEnnLQ+SjM =Yz5B -----END PGP SIGNATURE----- --brEuL7wsLY8+TuWz--
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