I purchased the Samsung Bar Plus 256 G for my UnRaid boot device.

I downloaded USB Creator and tried to install UnRaid 7.0.1.

The first time I ran it I got "Error running fat32format. Failed to allow extended DASD on device". 

 

I formatted the drive, and tried again, and it appeared to complete normally.

I installed the USB in the T440 server, and tried to boot. It started to boot, then gave the "bzmodules checksum error"

 

I saw this article that says to re-create the drive. So I ran USB Creator again.

And now it gives the "Error running fat32format. Failed to allow extended DASD on device" error again.

I try USB creator again immediately, and it proceeds with the writing process. It succeeds reporting ""Unraid 7.0.1 has been written to Samsung Flash Drive USB Device". I cleanly eject "Unraid G:" and install it in the T440 server.

 

Retry boot of T440. This time I got to Unraid login. 

 

So maybe it is OK?

Or is there something I should be concerned about?

 

 

Edited April 13, 20251 yr by timg11

If it's booting correctly it should be fine, the OS files are checksummed every boot.

Firstly I had to smile at the error message which was surely written by someone with an IBM background in mainframe technologies. DASD is the common term for any form of storage drive technology going back maybe to the early 1990's or before that (even I'm not the old) - my first employment with IBM was in network operations - and some of that involved the SNA networks.

The other point I was going to suggest is that this is a USB 3.1 drive of 256GB capacity unless Mr Google has let me down? Do the specs not heartily recommend USB2,0 drives no larger than 32GB? I thought that the larger specifications required less reliable storage controllers or some such?

Just a thought though

1 hour ago, andybundy said:

Do the specs not heartily recommend USB2,0 drives no larger than 32GB?

You can still use larger than that, as long as it's correctly formatted, using the USB tool or outside Windows, I have one SSD via USB adapter that is 256GB, and had 1TB before.