Date: Sat, 23 Jun 2007 22:50:16 GMT From: Dieter <freebsd@sopwith.solgatos.com> To: freebsd-gnats-submit@FreeBSD.org Subject: usb/113977: Need a way to set mode of USB disk's write cache Message-ID: <200706232250.l5NMoGAv015258@www.freebsd.org> Resent-Message-ID: <200706232300.l5NN06fX007157@freefall.freebsd.org>
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>Number: 113977 >Category: usb >Synopsis: Need a way to set mode of USB disk's write cache >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-usb >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Jun 23 23:00:06 GMT 2007 >Closed-Date: >Last-Modified: >Originator: Dieter >Release: 6.2 >Organization: >Environment: 6.2-RELEASE amd64 >Description: Need a way to set a USB disk's write cache to write-through mode, to prevent filesystem corruption. As far as I can tell, putting "hw.ata.wc=0" in loader.conf only affects directly connected PATA/SATA disks, not disks connected via a USB-to-*ATA bridge. Perhaps via camcontrol? But "camcontrol modepage da0 -l -v" returns nothing. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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