In article ,
bob prohaska   wrote:
>Scott Alfter  wrote:
>> I can confirm from having used them that these devices support UAS:
>>
>> https://amzn.to/3esKBDA
>>   (2.5" HD/SSD enclosure...and it's clear!)
>>
>> https://amzn.to/2YXVF4P
>>   (dongle for reading drives...includes a wall wart to power 3.5" & 5.25"
>>    devices)
>
>That is most helpful.
>
>Will either device support scatter-gather on a Pi4?

How would you determine this?  Is it something that will show up in a
logfile?  (If it's enabled for a device, UAS pops up in /var/log/messages.)
Does it depend on the storage device in use?  IIRC, I have a Samsung Evo 850
in the enclosure.  I have some WD Blues & Greens I can test with the dongle.

  _/_
 / v \ Scott Alfter (remove the obvious to send mail)
(IIGS( https://alfter.us/           Top-posting!
 \_^_/                              >What's the most annoying thing on Usenet?

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