| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Andrew Sullivan <andrew(at)libertyrms(dot)info> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Upgrading my BSDI box, again |
| Date: | 2003-07-30 19:39:53 |
| Message-ID: | 200307301939.h6UJdrM01258@candle.pha.pa.us |
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| Thread: | |
| Lists: | pgsql-hackers |
Andrew Sullivan wrote:
> On Wed, Jul 30, 2003 at 12:38:54AM -0400, Bruce Momjian wrote:
> > Guys, I just replied to this email on the BSDi email list. The issue is
> > that someone found that some(most?) IDE drives have write cache enabled,
> > though the drives do not preserve the write cache data on power failure.
>
> It's yet worse than this. Some IDE drives will respond to the
> command to turn off write cacheing, but they _don't actually turn it
> off_. In other words, you think you've done the right thing, and you
> haven't anyway.
Is there an interface to control this with IDE drives? I know there is
scsicmd for SCSI, but I didn't think IDE had any similar interface to
control the drive.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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