Re: Adding a USB device to a SATA-only array

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On 2018-07-15 21:33, Kevin Lyda wrote:
> On Sun, Jan 7, 2018 at 12:10 PM, Wols Lists <antlists@xxxxxxxxxxxxxxx> wrote:
>> On 07/01/18 10:58, Kevin Lyda wrote:
>>> This scenario sounds great, but last I knew mixing SATA and USB
>>> connected disks would lead to data corruption. But I last looked
>>> around 2010 or so. Is this still true? If not, what version of the
>>> kernel / mdadm tools did it get fixed in. I skimmed the changelogs and
>>> commits and didn't see any mentions that it had been.
>> Speaking off the top of my head, I got the impression that the problem
>> actually lies in the USB protocol. In other words it can't be fixed :-(
> It seems it can be fixed. Are there any plans to move such
> changes into the mainline kernel?
>
>
Cannot be fixed. The big problem with USB is the not-so-dependable
connection. This can come from multiple sources:
- bad cable
- bad connector (too often used for example)
- someone who does not know what the USB is for temporarily removing it
(for example for cleaning purposes)
- ...

Cheers

Rudy
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