On Thu, May 24, 2001 at 12:48:02AM -0500, Mike Silbersack wrote:
> Write caching is now off by default. man ata to see how to turn it back
> on.
Ummmm. I setting hw.ata.wc=1 and got:
ted:~$ sudo sysctl -w hw.ata.wc=1
sysctl: oid 'hw.ata.wc' is read only
I'm assuming that this is because my controller doesn't support write
caching. Can anyone confirm this? If that's why the oid is
read-only, a one-liner in the ata man page (that I'm happy to write)
would be a good thing.
Here's what I hope is the relevant stuff from dmesg:
ted:~$ dmesg | egrep '^(ata|a[cd])'
atapci0: <Intel PIIX4 ATA33 controller> port 0x10a0-0x10af at device 7.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
ad0: 19609MB <QUANTUM FIREBALLP KX20.5> [39842/16/63] at ata0-master UDMA33
acd0: CDROM <CRD-8400B> at ata1-master using PIO4
acd1: CD-RW <CD-RW CRX100E> at ata1-slave using PIO4
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