Date: Mon, 7 Feb 2022 04:02:16 +0000 From: Graham Perrin <grahamperrin@gmail.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: Re: USB Disk Stalls on -current Message-ID: <2bc20b06-d2f6-2dd1-2fdc-c4a288515604@gmail.com> In-Reply-To: <60ebd011-c2b8-3524-1476-123f11128ffe@freebsd.org> References: <7e8459e4-d708-7750-402c-cda2adf6199f@freebsd.org> <CANCZdfqG-%2B9dfFz-%2BeezZaqbPQN5-mQpw%2B214CkiKC%2B_kmW2ig@mail.gmail.com> <60ebd011-c2b8-3524-1476-123f11128ffe@freebsd.org>
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On 06/02/2022 17:14, Sean Bruno wrote: > … the clanking/grinding sound of the spinning rust on my desk > completely stops, the encoding of the video files stops (so its > waiting for a read to complete)… On 06/02/2022 19:02, Sean Bruno wrote: > … assuming that I have a fairly dodgy USB device, as the pauses seem > to correspond to this from CAM being emitted: > > Feb 6 11:56:43 alice kernel: (da0:umass-sim1:1:0:0): READ(10). CDB: > 28 00 36 69 02 6e 00 00 80 00 > Feb 6 11:56:43 alice kernel: (da0:umass-sim1:1:0:0): CAM status: CCB > request completed with an error > Feb 6 11:56:43 alice kernel: (da0:umass-sim1:1:0:0): Retrying > command, 2 more tries remain > > Things resume after this is emitted, but there is a substantial > (multiple minutes) pause here. … Yep, for a pause of that length (without a logged exhaustion) I'd suspect the hard disk drive. Over the years, I've seen 'CCB request completed with an error' often enough, and in various situations, with _good_ media e.g. <https://pastebin.com/knzQE6Y3>, to get a sense (for myself) of whether there's a marginal cable, marginal port at the computer, marginal port at the drive, or some combination of those three things. Can you get S.M.A.R.T. data? An extended self-test might not expose an issue that becomes evident with sustained _writes_ (although I note your opening post comment about waiting for a read to complete). HTH Graham
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