From: Stefan Richter <stefanr@s5r6.in-berlin.de> To: Alan Stern <stern-nwvwT67g6+6dFdvTe/nMLpVzexx5G7lz@public.gmane.org> Cc: James Bottomley <James.Bottomley-l3A5Bk7waGM@public.gmane.org>, Mark Lord <mlord-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>, ltuikov-/E1597aS9LQAvxtiuMwx3w@public.gmane.org, Sarah Sharp <sarah.a.sharp-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>, Jonas Schwertfeger <jschwertfeger-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Dinh.Nguyen-KZfg59tc24xl57MIdRCFDg@public.gmane.org, Sergei Shtylyov <sshtylyov-Igf4POYTYCDQT0dZR+AlfA@public.gmane.org>, Kay Sievers <kay.sievers-tD+1rO4QERM@public.gmane.org>, David Zeuthen <david-o55+BOBDEFg@public.gmane.org>, linux-hotplug-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, USB Storage List <usb-storage-ijkIwGHArpdIPJnuZ7Njw4oP9KaGy4wf@public.gmane.org>, Matthew Dharm <mdharm-usb-JGfshJpz5UybPZpvUQj5UqxOck334EZe@public.gmane.org>, linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Lennart Poettering <lennart-mdGvqq1h2p+GdvJs77BJ7Q@public.gmane.org>, Douglas Gilbert <dgilbert-qazKcTl6WRFWk0Htik3J/w@public.gmane.org> Subject: Re: System hangs when using USB 3.0 HD with on Ubuntu Date: Wed, 21 Apr 2010 23:29:39 +0000 [thread overview] Message-ID: <4BCF8A63.3000906@s5r6.in-berlin.de> (raw) In-Reply-To: <Pine.LNX.4.44L0.1004211032460.1728-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org> Alan Stern wrote: > On Wed, 21 Apr 2010, James Bottomley wrote: [Mark Lord wrote] >> > That said.. what would you recommend as a way for a userspace >> > program to figure out whether to use ATA_12 or ATA_16 to talk >> > to a given arbitrary device name ? >> >> To be honest, no. For USB, All USB is SCSI or RBC command based. You >> don't have any idea whether it's a real SCSI device or an ATA device >> behind a SAT ... the only reason you assume it's ATA is because USB >> gadget builders tend to be cheapskates. >> >> > I guess the info is in sysfs somewhere. >> >> Only for direct interconnects. For USB most bets are off. > > You can find out whether the device might be MMC by sending an ordinary > SCSI INQUIRY command. (Or you can get the device type from the > "modalias" attribute file in the device's sysfs directory, which just > shows the information the kernel got when _it_ sent an INQUIRY > command.) Some firmwares start behaving irregularly if they get INQUIRY in an order that the firmware author did not expect. (I.e. not as the very first request.) Hence use the kernel's inquiry data from sysfs whenever possible, instead of an own INQUIRY. -- Stefan Richter -===-=-=- -=-- =-=- http://arcgraph.de/sr/
next prev parent reply other threads:[~2010-04-21 23:29 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L0.1003261705340.23253-100000@netrider.rowland.org>
[not found] ` <4BAD275A.7050903@interlog.com>
[not found] ` <59ca64281003300044g53ae5170xaf198bf99964fc36@mail.gmail.com>
2010-03-31 11:39 ` System hangs when using USB 3.0 HD with on Ubuntu Jonas Schwertfeger
2010-03-31 14:56 ` Alan Stern
2010-03-31 15:20 ` David Zeuthen
2010-03-31 16:12 ` Douglas Gilbert
2010-03-31 16:36 ` Alan Stern
2010-04-01 13:32 ` Jonas Schwertfeger
2010-04-01 13:42 ` Kay Sievers
2010-04-01 13:55 ` Jonas Schwertfeger
[not found] ` <r2k59ca64281004010655z93fedfa8rdeb447d82a848d9f-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-04-01 14:05 ` Kay Sievers
2010-04-02 12:40 ` Jonas Schwertfeger
[not found] ` <m2l59ca64281004020540z7e502130g22dfc035f1ceda6a-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-04-02 13:09 ` Jonas Schwertfeger
[not found] ` <t2t59ca64281004020609sa0f67f0dj5c127e3f0b2e4db2-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-04-02 14:12 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004021010130.1615-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-02 14:41 ` James Bottomley
[not found] ` <1270219267.2899.73.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
2010-04-02 14:57 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004021052040.1615-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-02 15:19 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004021114160.1615-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-02 15:50 ` Sergei Shtylyov
2010-04-02 15:59 ` James Bottomley
2010-04-07 18:08 ` Mark Lord
2010-04-07 18:29 ` James Bottomley
2010-04-07 19:18 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004071516260.5760-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-07 22:49 ` Mark Lord
2010-04-08 5:06 ` Jonas Schwertfeger
2010-04-02 16:21 ` Douglas Gilbert
2010-04-02 16:39 ` Douglas Gilbert
[not found] ` <4BB61DAF.7090709-qazKcTl6WRFWk0Htik3J/w@public.gmane.org>
2010-04-02 21:24 ` Mark Lord
2010-04-03 6:21 ` Jonas Schwertfeger
[not found] ` <4BB73EB3.3040308@pobox.com>
2010-04-03 15:40 ` Jonas Schwertfeger
2010-04-03 16:42 ` Alan Stern
2010-04-03 17:06 ` Jonas Schwertfeger
2010-04-03 20:58 ` Alan Stern
2010-04-04 1:29 ` Mark Lord
[not found] ` <Pine.LNX.4.44L0.1004031648230.21507-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-06 6:43 ` Jonas Schwertfeger
[not found] ` <4BBAD7FF.5000605-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-04-06 14:49 ` Alan Stern
2010-04-06 14:56 ` Jonas Schwertfeger
[not found] ` <Pine.LNX.4.44L0.1004061048590.1722-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-07 6:27 ` Jonas Schwertfeger
[not found] ` <4BBC25C9.5030201-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-04-07 14:36 ` Alan Stern
2010-04-07 14:42 ` Jonas Schwertfeger
2010-04-07 14:51 ` Jerone Young
2010-04-07 15:03 ` Alan Stern
2010-04-07 15:10 ` Jonas Schwertfeger
2010-04-09 15:38 ` Alan Stern
2010-04-09 16:39 ` Douglas Gilbert
[not found] ` <4BBF582F.4040707-qazKcTl6WRFWk0Htik3J/w@public.gmane.org>
2010-04-09 17:14 ` Sarah Sharp
2010-04-09 18:00 ` Jonas Schwertfeger
2010-04-09 19:25 ` Alan Stern
2010-04-09 21:54 ` Sarah Sharp
2010-04-12 7:48 ` Jonas Schwertfeger
2010-04-16 18:20 ` Sarah Sharp
2010-04-16 19:25 ` Alan Stern
2010-04-19 21:15 ` Sarah Sharp
2010-04-20 0:25 ` Mark Lord
2010-04-20 4:31 ` Mark Lord
2010-04-20 15:39 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004201045180.1837-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-20 17:37 ` Sarah Sharp
2010-04-20 19:48 ` Alan Stern
[not found] ` <4BCF0605.7080508@pobox.com>
[not found] ` <4BCF4120.4060806@pobox.com>
2010-04-21 18:27 ` Jonas Schwertfeger
2010-04-21 19:07 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004211506040.1422-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-21 19:24 ` Mark Lord
2010-04-26 16:27 ` Sarah Sharp
2010-04-29 8:44 ` Jonas Schwertfeger
2010-04-29 12:56 ` Mark Lord
2010-04-29 15:45 ` Alan Stern
2010-05-07 10:42 ` Jonas Schwertfeger
[not found] ` <4BE3EE87.6020505-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2010-05-07 15:03 ` Alan Stern
2010-05-11 6:54 ` Jonas Schwertfeger
2010-05-11 14:44 ` Alan Stern
2010-05-12 12:56 ` Mark Lord
2010-05-12 14:23 ` Douglas Gilbert
2010-05-12 14:37 ` Mark Lord
2010-05-12 14:45 ` Mark Lord
2010-05-12 15:09 ` Alan Stern
2010-05-12 15:39 ` James Bottomley
2010-05-12 18:48 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1005121444450.1353-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-05-13 3:12 ` Mark Lord
2010-05-13 18:42 ` Alan Stern
2010-04-21 12:31 ` Luben Tuikov
2010-04-21 14:31 ` Alan Stern
2010-04-21 12:47 ` Luben Tuikov
2010-04-21 13:52 ` Mark Lord
2010-04-21 14:04 ` James Bottomley
2010-04-21 14:08 ` Mark Lord
2010-04-21 14:15 ` James Bottomley
2010-04-21 14:13 ` Mark Lord
2010-04-21 14:22 ` James Bottomley
[not found] ` <1271859728.2893.72.camel-0iu6Cu4xQGLYCGPCin2YbQ@public.gmane.org>
2010-04-21 14:53 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.1004211032460.1728-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2010-04-21 23:29 ` Stefan Richter [this message]
2010-04-20 17:48 ` Douglas Gilbert
2010-04-16 21:31 ` James Bottomley
2010-04-16 23:56 ` Douglas Gilbert
2010-04-19 15:04 ` Jonas Schwertfeger
2010-04-19 16:02 ` Alan Stern
2010-04-19 20:45 ` Sarah Sharp
2010-04-02 17:36 ` Sarah Sharp
2010-03-31 16:37 ` David Zeuthen
[not found] ` <1270053444.16657.17.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2010-03-31 16:58 ` Lennart Poettering
2010-03-31 17:03 ` Lennart Poettering
[not found] ` <20100331165807.GA20547-kS5D54t9nk0aINubkmmoJbNAH6kLmebB@public.gmane.org>
2010-03-31 17:17 ` David Zeuthen
2010-03-31 17:06 ` David Zeuthen
[not found] ` <1270049200.2302.320.camel@laptop>
2010-03-31 15:37 ` Jonas Schwertfeger
2010-04-21 14:58 ` Luben Tuikov
2010-04-21 15:09 ` Luben Tuikov
2010-04-21 16:09 ` Alan Stern
2010-04-21 16:18 ` Martin K. Petersen
2010-04-21 17:41 ` Sarah Sharp
2010-04-21 18:08 ` Alan Stern
2010-04-22 0:08 ` Luben Tuikov
2010-04-22 14:52 ` Alan Stern
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