Date: Wed, 19 Oct 2016 11:26:22 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Arrigo Marchiori <ardovm@yahoo.it> Cc: Arrigo Marchiori via freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Random truncated files on USB hard disk with timeouts; how to debug? Message-ID: <23735.1476876382@critter.freebsd.dk> In-Reply-To: <20161019080005.GD93031@nuvolo> References: <20161018152715.GC89691@nuvolo> <51997.1476812624@critter.freebsd.dk> <20161019062812.GA93031@nuvolo> <7759.1476858801@critter.freebsd.dk> <20161019064315.GB93031@nuvolo> <7924.1476861738@critter.freebsd.dk> <20161019080005.GD93031@nuvolo>
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-------- In message <20161019080005.GD93031@nuvolo>, Arrigo Marchiori writes: >> If the drive has bad power supply, that may not happen. > >Yes, I understand. But, forgive me for insisting: there is an >inconsistency that is _at filesystem level_ and _temporary_, and this >really puzzles me. Because the drive returns wrong data every so often and when power is better returns correct data ? End-to-End arguments in system design applies here: Either you trust your drive, or you check everything it tells you (ie: RAID with parity, ZFS or similar). The only middle way is prayer. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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