SU requires that data it once sends to the drive gets written
immediately, not cached by the drive. Modern desktop drives
don't do that
They do if you set them to write-through cache instead of
write-back cache.
Modern SATA drives also provide NCQ. When is FreeBSD going
to support NCQ?
than SU
The caching can be stopped by putting hw.ata.wc=0 into
/boot/loader.conf. Doesn't that settle this point about safety?
but that's not needed. UPS is enough. even if your machine will
halt/crash/panic, drive cache will be written then.
Since we use softupdates and others use
On Friday 18 April 2008 17:40:04 Ivan Voras wrote:
5. Some UFS implementations avoid journaling and
instead implement soft updates: they order their
writes in such a way that the on-disk file system is
never inconsistent, or that the only inconsistency
that can be created in the
2008/4/19 Mel [EMAIL PROTECTED]:
On Friday 18 April 2008 17:40:04 Ivan Voras wrote:
5. Some UFS implementations avoid journaling and
instead implement soft updates: they order their
writes in such a way that the on-disk file system is
never inconsistent, or that the only
Ivan Voras wrote:
1) Soft-updates were created in a different time, with different
requirements than modern hard drives (especially desktop hard drives)
can deliver. Especially, SU requires that data it once sends to the
drive gets written immediately, not cached by the drive. Modern
desktop
