[issue1418] HAMMER and problem with external drive(s)

[Matthew Dillon]

:New submission from Joel K. Pettersson <joelkpettersson at gmail.com>:
:
:Problems beginning some time after mount on line beginning with "(da8". Thi=
:s is
:a new version 2 hammer partition made and used on freshly updated system on
:ThinkPad X31 laptop. Same kind of error and messages have appeared with a

    Yah, the problem is the usb device can't handle a cache flush
    request.  HAMMER ignores the failure, but unfortunately the
    failed cache sync probably bricks the usb port.

    This has hit a number of people.  I am going to change the
    code to disable cache flushes for usb-attached devices
    by default.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>