> > > > hw.ata.wc=3D3D0 > > > ^^^^^^^^^^^ > > > "Make my hard drive go reeeeally slow please (just in case I crash)" :) > >=20 > > Slower, yes, but not *that* slow. > >=20 > > Normal ls : 0.032 second. Two processes using same disk, multiply by two, > > so 0.064 second. Maybe the multiplier is more than 2, call it 10x, so > > 0.32 second. But I'm seeing a factor of over 9100x. > > Humour me and turn it back on, then see what happens.
Where is the knob to turn the write cache on/off on a per-drive basis in FreeBSD? I can do this in NetBSD, but the only knob I can find in FreeBSD affects all drives, and requires a reboot. Humour me and read the Subject line. The ls does not get its fair share of disk I/O. Both times are with the disk's write cache in write-through mode. I'm not comparing times with the write cache in different modes. I'm comparing ls by itself against ls competing with cp. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"