Scott Marlowe wrote: > Actually, in the case of the Escalades at least, the answer is yes. > Last year (maybe a bit more) someone was testing an IDE escalade > controller with drives that were known to lie, and it passed the power > plug pull test repeatedly. Apparently, the escalades tell the drives to > turn off their cache. While most all IDEs and a fair number of SATA > drives lie about cache fsyncing, they all seem to turn off the cache > when you ask. > > And, since a hardware RAID controller with bbu cache has its own cache, > it's not like it really needs the one on the drives anyway.
You do if the controller thinks the data is already on the drives and removes it from its cache. -- Bruce Momjian http://candle.pha.pa.us EnterpriseDB http://www.enterprisedb.com + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
