On Sun, 2013-04-07 at 14:29 +0800, Jov wrote: > from the pg doc： > http://www.postgresql.org/docs/devel/static/wal-reliability.html :On Linux, > IDE drives can be queried using hdparm -I; write caching is enabled if > there is a * next to Write cache. hdparm -W 0 can be used to turn off write > caching. SCSI drives can be queried using > sdparm<http://sg.danny.cz/sg/sdparm.html>. > Use sdparm --get=WCE to check whether the write cache is enabled and sdparm > --clear=WCE to disable it. > > from the hdparm man page : > http://linux.die.net/man/8/hdparm :hdparm - get/set SATA/IDE device > parameters > > so,the doc is out date, it should mention hdparm also support SATA.
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