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Date:      Sat, 21 Nov 2020 22:21:17 +0100
From:      Christoph Harder <shadowomf@arcor.de>
To:        freebsd-questions@freebsd.org
Subject:   Re: usb harddisk not working
Message-ID:  <e6cf8383-7374-eda5-9278-209e9920dd7d@arcor.de>
In-Reply-To: <20201121221333.19973dbd.freebsd@edvax.de>
References:  <b677a42e-a351-7fd5-24e8-770b251d6ba5@arcor.de> <20201121204425.86d9c6b1.freebsd@edvax.de> <20201121212613.153cfbda@archlinux> <20201121221333.19973dbd.freebsd@edvax.de>

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Hello,

thank you for the fast feedback.

Regarding power saving I suspected as much and won't persue it further.

I'll try to change the usb cable, maybe I'm "lucky" and it works.

Best regards,
Christoph



Am 21.11.2020 um 22:13 schrieb Polytropon:
> On Sat, 21 Nov 2020 21:26:13 +0100, Ralf Mardorf wrote:
>> On Sat, 21 Nov 2020 20:44:25 +0100, Polytropon wrote:
>>> This could be a wiring thing, but in my experience with cheap USB dis=
k
>>> enclosings, it's probably a version of the firmware (the part that
>>> does "USB plug <---> SATA disk") that is not working properly and
>>> according to the standard. This can also explain the "works here, but=

>>> not there" and "works sometimes, but not always".
>>
>> Hahaha,
>>
>> IIRC we already agreed off-list regarding USB enclosures and the
>> firmware a while ago.
>>
>> I can not remember that we discussed wiring issues.
>>
>> IMO it's super-very-most-unlikely a wiring issue. I can't imagine a
>> reasonable wiring issue.
>=20
> I wanteed to mention this because I experienced that once:
> It was a USB enclosure with the came it came with - worked
> sometimes, on some systems, but was hard to predict _where_
> it would work _when_. Turned out, after removing the
> original USB cable and using a different one, the disk
> worked everywhere every time. :-)
>=20
> I called this "wiring issue" because the only thing involved
> is the wires in the USB cable. There _might_ be wiring
> problems within the enclosure (PCB to disk), but that doesn't
> seem to happen that often. Still a possibility.
>=20
>=20
>=20
>> In the beginning I disassembled the drives and connected them to my PC=

>> to test, if the drives are broken. Nowadays I don't even test the
>> drives, I directly return such USB enclosures. I even don't waste time=

>> to test another USB port ;), let alone another computer.
>=20
> In the past, I also solved "broken disk" issues by removing
> them from the enclosure and attaching them to my trusted
> JMicron universal adapter (for SATA, PATA, mini-PATA), using
> the original power supply. So far, that worked on _every_
> computer's _every_ USB port. :-)
>=20
>=20
>=20

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