Eric Sandeen schrieb:
>
> On Tue, 19 Mar 2002, Simon Matter wrote:
>
> > Eric Sandeen schrieb:
> > >
> > > I don't know for sure how IDE write caching works, to tell you the
> > > truth. Try making sure it's off, and we'll go from there.
> >
> > How can I disable write caching on the Quantum AS20.5 disks? I've tried
>
> hdparm -W
>
> -W Disable/enable the IDE drive's write-caching feature (usually OFF
> by default).
I have disabled the write cache directly on the disk with IBM's feature
tool. The bad thing is that after a reboot, write cache is enabled again
which means that this drive doesn't store caching config permanently!
So I have put EXTRA_PARAMS=-W0 into /etc/sysconfig/harddisks and
rebooted. syslog confirms that:
[root@gw-linux-dev xinetd.d]# grep hdparm /var/log/messages
Mar 19 16:14:30 gw-linux-dev hdparm: /dev/hda:
Mar 19 16:14:30 gw-linux-dev hdparm: setting drive write-caching to 0
(off)
Mar 19 16:14:30 gw-linux-dev hdparm: /dev/hdb:
Mar 19 16:14:30 gw-linux-dev hdparm: setting drive write-caching to 0
(off)
So I should be safe. Tried a bonnie and the result shows that cache IS
off.
Tried
[root@gw-linux-dev xinetd.d]# ntsysv ; reboot
and got zeroed files in /etc/xinetd.d/ again!!!
What can I do now?
-Simon
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