Date: Sat, 26 Jan 2008 19:20:02 GMT From: Ben Kelly <bkelly@vadev.org> To: freebsd-usb@FreeBSD.org Subject: Re: usb/95173: [umass] [patch] cannot mount external usb harddisk VIA Technologies Inc. USB 2.0 IDE Bridge Message-ID: <200801261920.m0QJK2ZP010892@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
The following reply was made to PR usb/95173; it has been noted by GNATS. From: Ben Kelly <bkelly@vadev.org> To: bug-followup@FreeBSD.org, diazepam@gmx.net Cc: Subject: Re: usb/95173: [umass] [patch] cannot mount external usb harddisk VIA Technologies Inc. USB 2.0 IDE Bridge Date: Sat, 26 Jan 2008 14:14:16 -0500 For the PR I thought I would also just throw in another thought I had. It occurred to me that since umass devices are usually designed for a "can be pulled at any time" environment, it seems likely that most of them disable write caching anyways. With that in mind, would it make more sense to disable the SYNC command by default and add a quirk for those devices where its known to be functioning and useful? This might increase the default compatibility of the FreeBSD USB stack with devices in the future. I count around 34 entries in scsi_da.c for umass devices simply to add the NO_SYNC quirk. Just a thought. If people are interested I can develop a patch for this.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200801261920.m0QJK2ZP010892>