Date: Sat, 6 Jul 2013 23:33:01 +0200 From: Polytropon <freebsd@edvax.de> To: Nazar Kazakov <kazakov.nazar@yandex.ru> Cc: freebsd-questions@freebsd.org Subject: Re: install on external hdd Message-ID: <20130706233301.cae24c19.freebsd@edvax.de> In-Reply-To: <120991373145348@web19g.yandex.ru> References: <792201373145102@web1h.yandex.ru> <120991373145348@web19g.yandex.ru>
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On Sun, 07 Jul 2013 01:15:48 +0400, Nazar Kazakov wrote: > In dmesg repeats the old conclusion that I wrote, but in dmesg > I found information about five usbus and all except the last > one (it has 2.0) written usb 1.0. > I tried to connect the hdd to last, but failed. Looks like a current issue. From WP: A unit load is defined as 100 mA in USB 2.0, and 150 mA in USB 3.0. A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0; 6 (900 mA) in USB 3.0. If the disk needs more than 500 mA to spin up and start properly, it won't work on a USB 2.0 port unless you use the external power supply. > Also about usbus written that they are 2-port hub (probably > built into the motherboard). In the first four usbus is intel > UHCI root HUB, at the last - intel EHCI root HUB That kind of combination can often be found. My older home PC also had this kind of configuration (Intel EHCI, VIA UHCI). > "ls / dev / da *" finds nothing > "camcontrol devlist" outputs only DVD RW This shows that the disk isn't recognized by the OS, therefore not usable in any disk-related operation. > My hdd has an input for an external power supply, and it is > already connected to a second usb port. Also check the USB cable. Sometimes a "partially defective" cable causes this kind of trouble. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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