[kwlug-disc] Don't do what I did...

[Chris Irwin]

On Tue, Apr 06, 2021 at 01:54:07PM -0400, Chris Irwin via kwlug-disc wrote:
>On Mon, Mar 01, 2021 at 07:12:42PM -0500, CrankyOldBugger wrote:
>
>I guess it does some transparent LBA sector size remapping, to "help" 
>if you want to use MBR on large format drives for some unknown reason. 
>So if you plug in a drive with 4096-bit sectors , it "helpfully" 
>translates that to 512-bit sectors.

Here's a pretty good write up I found about the issue I had, which may 
have been different than yours (it wasn't truncating my drives):

https://www.klennet.com/notes/2018-04-14-usb-and-sector-size.aspx

I had it the other way around. It forcibly converts drives to 4096b 
sectors.

The drive when connected via sata reports the following via parted:

     Sector size (logical/physical): 512B/4096B

When connected via the problematic USB enclosure:

     Sector size (logical/physical): 4096B/4096B

Because of this difference, the partition table can't be found 
correctly.

-- 
Chris Irwin

email:   chris at chrisirwin.ca
  xmpp:   chris at chrisirwin.ca
   web: https://chrisirwin.ca