kern/106340: Need to control disk write cache on per-disk basis

[mjacob at freebsd.org]

The following reply was made to PR kern/106340; it has been noted by GNATS.

From: mjacob at freebsd.org
To: Dieter <freebsd at sopwith.solgatos.com>
Cc: freebsd-gnats-submit at freebsd.org, freebsd-bugs at freebsd.org
Subject: Re: kern/106340: Need to control disk write cache on per-disk basis
Date: Mon, 4 Dec 2006 10:51:18 -0800 (PST)

 > 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?
 
 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).
 
 -matt