Date: Wed, 19 Oct 2016 08:28:12 +0200 From: Arrigo Marchiori <ardovm@yahoo.it> To: Poul-Henning Kamp <phk@phk.freebsd.dk> 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: <20161019062812.GA93031@nuvolo> In-Reply-To: <51997.1476812624@critter.freebsd.dk> References: <20161018152715.GC89691@nuvolo> <51997.1476812624@critter.freebsd.dk>
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Hello Poul, thank you for replying. On Tue, Oct 18, 2016 at 05:43:44PM +0000, Poul-Henning Kamp wrote: > -------- > In message <20161018152715.GC89691@nuvolo>, Arrigo Marchiori via freebsd-fs wri > tes: > > >The USB hard drive occasionally times out for ~10 seconds. > > When you say "hard drive" do you mean actually rotating platters > or do you mean a flash-based device ? It is a USB disk bought some years ago, that contains actually rotating platters. It has a Y-shaped cable, to get power from two ports. usbconfig(8) says: ----8<--------8<--------8<--------8<--------8<--------8<--------8<--------- ugen6.2: <StoreJet Transcend JMicron> at usbus6, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON (2mA) ----8<--------8<--------8<--------8<--------8<--------8<--------8<--------- And the relevant lines from dmesg(1) are the following (verbose boot): ----8<--------8<--------8<--------8<--------8<--------8<--------8<--------- ugen6.2: <JMicron> at usbus6 umass0 on uhub6 umass0: <MSC Bulk-Only Transfer> on usbus6 umass0: SCSI over Bulk-Only; quirks = 0x8100 umass0:4:0: Attached to scbus4 random: harvesting attach, 8 bytes (4 bits) from umass0 mountroot: waiting for device /dev/da0s2a... pass2 at umass-sim0 bus 0 scbus4 target 0 lun 0 pass2: <StoreJet Transcend > Fixed Direct Access SCSI-2 device pass2: Serial Number 19CD0594134F pass2: 40.000MB/s transfers GEOM: new disk da0 da0 at umass-sim0 bus 0 scbus4 target 0 lun 0 da0: <StoreJet Transcend > Fixed Direct Access SCSI-2 device da0: Serial Number 19CD0594134F da0: 40.000MB/s transfers da0: 238475MB (488397168 512 byte sectors) da0: quirks=0x2<NO_6_BYTE> da0: Delete methods: <NONE(*),ZERO> ----8<--------8<--------8<--------8<--------8<--------8<--------8<--------- I hope this helps. Best regards, -- rigo http://rigo.altervista.org
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