USB3 to SATA 3.5" enclosures without energy-saving mode

[Ralf Mardorf]

On Mon, 2019-09-23 at 17:34 +0200, Oliver Grawert wrote:
> hi,
> Am Montag, den 23.09.2019, 17:12 +0200 schrieb Ralf Mardorf via ubuntu-
> users:
> > Hi,
> > 
> > do you know any USB3 to SATA2 or SATA3 bridge, 3.5" HDD enclosure for
> > less than 25,- €, that is without an energy-saving mode and at least
> > allows usage of drives up to 2 TiB?
> 
> have you simply tried telling the kernel to keep the USB bus up instead
> of (auto)suspending it ? i imagine that would also just keep the drive
> active ... 
> 
> (i.e. by setting the power/control and power/autosuspend_delay_ms in
> sysfs for the particular USB device like described in [1])
> 
> 
> ciao
> 	oli
> 
> [1] https://www.kernel.org/doc/html/v4.14/driver-api/usb/power-management.html

I need to reboot to take a look at my Ubuntu install, however, for the
Arch install it's not "-1", it is

$ cat /sys/module/usbcore/parameters/autosuspend
2

However, one model of case I own never goes to sleep, despite the value
"2" and another model goes to sleep, but could be waked up without
resulting in an input/output error.

Two different other models fail with input/output errors. I don't have
one at hand anymore.

It's the same for the Ubuntu and for the Arch Linux install.

All were connected to the same bus, the same computer, the same Ubuntu
16.04 and Arch Linux install. Excepted of the drive that goes to sleep,
but still works, it's a WD bundle, the other cases are used with the
same Toshiba P300 HDD.