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 gjournal, one suspects that
there are reasons why "real" journaling systems have not been adopted.
softupdates works very well, and doesn't write the same thing twice, like
journaling.
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