I add few sentences how to write cache works on Solaris platform.
Zdenek
Index: doc/src/sgml/wal.sgml
===================================================================
RCS file: /zfs_data/cvs_pgsql/cvsroot/pgsql/doc/src/sgml/wal.sgml,v
retrieving revision 1.49
diff -c -r1.49 wal.sgml
*** doc/src/sgml/wal.sgml 10 Dec 2007 22:08:36 -0000 1.49
--- doc/src/sgml/wal.sgml 11 Dec 2007 14:22:32 -0000
***************
*** 65,71 ****
write caching. On <productname>FreeBSD</> use
<application>atacontrol</>. (For SCSI disks use <ulink
url="http://sg.torque.net/sg/sdparm.html"><application>sdparm</></ulink>
! to turn off <literal>WCE</>.) On <productname>Windows</> write caching is
disabled by unchecking <literal>My Computer\Open\{select disk
drive}\Properties\Hardware\Properties\Policies\Enable write caching on
the disk</>.
--- 65,73 ----
write caching. On <productname>FreeBSD</> use
<application>atacontrol</>. (For SCSI disks use <ulink
url="http://sg.torque.net/sg/sdparm.html"><application>sdparm</></ulink>
! to turn off <literal>WCE</>.) On <productname>Solaris</> with UFS write cache
! is disabled by default. Use <command>format -e</> to control it. ZFS works correctly
! with enabled write cache. On <productname>Windows</> write caching is
disabled by unchecking <literal>My Computer\Open\{select disk
drive}\Properties\Hardware\Properties\Policies\Enable write caching on
the disk</>.
