Date: Mon, 4 Dec 2006 20:40:14 GMT From: Dieter <freebsd@sopwith.solgatos.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/106340: Need to control disk write cache on per-disk basis Message-ID: <200612042040.kB4KeE6k007663@freefall.freebsd.org>
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The following reply was made to PR kern/106340; it has been noted by GNATS. From: Dieter <freebsd@sopwith.solgatos.com> To: mjacob@freebsd.org Cc: freebsd-gnats-submit@freebsd.org, freebsd-bugs@freebsd.org Subject: Re: kern/106340: Need to control disk write cache on per-disk basis Date: Mon, 04 Dec 2006 12:27:46 +0000 In message <20061204104730.H15778@ns1.feral.com>, mjacob@freebsd.org writes: > > FreeBSD only allows setting disk write cache mode on a system wide basis, > > and only at boot time. NetBSD allows setting the disk write cache mode > > of each disk individually, and does not require a reboot. See the NetBSD > > dkctl(8) man page. > > Which disks are you talking about? ATA disks? Yes, SATA disks. > For scsi disks you can do modepage edits via camcontrol that change it > on a per-disk basis, so I assume you must be talking about ATA disks > here, in which case it sounds like a simple addition to atacontrol(8). I did find camcontrol, but the only drive that shows up in camcontrol devlist is the PATA CD/DVD drive. This system doesn't have any real SCSI drives.
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