Horton

Re: O_DSYNC broken on MacOS X?

Peter Eisentraut <peter_e@gmx.net>

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From: Peter Eisentraut <peter_e@gmx.net>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Bruce Momjian <bruce@momjian.us>, Tom Lane <tgl@sss.pgh.pa.us>, Greg Stark <gsstark@mit.edu>, "A.M." <agentm@themactionfaction.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2010-10-25T16:51:26Z
Lists: pgsql-hackers 
On mån, 2010-10-25 at 09:33 -0400, Robert Haas wrote:
> It seems we're still missing some relevant details, because hdparm
> doesn't seem to work on SCSI devices.  Is sdparm the right utility in
> that case?  Does anyone know what the correct incantations look like?

Search the sdparm man page for "Writeback Cache".  It has detailed
examples.