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Message-ID: <eceedea7ca5d950eb8ea4d186a6b01a04d0a804f.camel@suse.com>
Subject: Re: Issues with LaCie USB3 drive and UAS
From:   Oliver Neukum <oneukum@suse.com>
To:     "David C. Partridge" <david.partridge@perdrix.co.uk>,
        linux-usb@vger.kernel.org
Date:   Mon, 09 Nov 2020 10:29:34 +0100
In-Reply-To: <004f01d6b5bd$d4f08ff0$7ed1afd0$@perdrix.co.uk>
References: <004f01d6b5bd$d4f08ff0$7ed1afd0$@perdrix.co.uk>
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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