From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <a07fd993b6a3ab2731fdf137e38b59a8@hamnavoe.com>
To: 9fans@9fans.net
From: Richard Miller <9fans@hamnavoe.com>
Date: Thu, 12 Jan 2012 12:05:03 +0000
In-Reply-To: <CA+N-5bagNq17-rBcMUU1soTi7n=3pyg+6Adaf0BNdOzZVc2PRQ@mail.gmail.com>
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Subject: Re: [9fans] usb flash drive with ext2
Topicbox-Message-UUID: 58d241ea-ead7-11e9-9d60-3106f5b1d025

> you can enable debug diagnostics for devices by using the usbd ctl file.

Sorry, I wasn't aware of that.  usbd(4) does describe setting
environment variables in plan9.ini to change the arguments for usb
drivers (I wasn't aware of that either), but doesn't mention that you
can also do it dynamically via usbdctl.  For example

  echo diskargs -d >/dev/usbdctl

before plugging in the device (or -dd, -ddd etc for more verbosity).
You may need to study the source of usb/disk to make sense of the
output.