RE: Issues with LaCie USB3 drive and UAS

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I'm sure you are right in your diagnosis (absent any knowledge to the contrary).

Now what's the treatment?  

Would uas black-list provide a work-araound? If so a detailed recipe will be needed by me ...

Fix to the code? Ideal, but takes lots longer, so a work-around may be needed for a while

David


-----Original Message-----
From: Oliver Neukum [mailto:oneukum@xxxxxxxx] 
Sent: 09 November 2020 09:30
To: David C. Partridge; linux-usb@xxxxxxxxxxxxxxx
Subject: Re: Issues with LaCie USB3 drive and UAS

Am Sonntag, den 08.11.2020, 10:56 +0000 schrieb David C. Partridge:
> LUbuntu 20.04.1
> 
> root@charon:/home/amonra# lsusb
> Bus 002 Device 006: ID 059f:105f LaCie, Ltd 2Big Quadra USB3
> 
> Trying to format the above drive using mkfs.ext4 /dev/sdc2
> 
> Initially got a 120s Kernel timeout which I resolved by setting the timeout
> to 0
> 
> However I got LOTS of message groups in the system log looking like this:
> 
> Nov 04 06:18:51 charon kernel: scsi host5: uas_eh_device_reset_handler start
> Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#0 uas_zap_pending 0
> uas-tag 1 inflight: 
> Nov 04 06:18:51 charon kernel: sd 5:0:0:0: [sdc] tag#0 CDB: Write Same(10)
> 41 00 e8 ea 47 fc 00 00 04 00

Write Same? What you are seeing is that the error handling is running
non-stop. I suspect that the device does not understand WRITE SAME.

	Regards
		Oliver





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