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Re: Two hard drives --- what to do with them?

From: Ben <bench(at)silentmedia(dot)com>
To: "Peter Kovacs" <maxottovonstirlitz(at)gmail(dot)com>
Cc: PostgreSQL Performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Two hard drives --- what to do with them?
Date: 2007-02-27 15:57:15
Message-ID: D1445F47-9CD4-4240-B0ED-A75ABE4B6867@silentmedia.com (view raw or flat)
Thread:
Lists: pgsql-performance
Just remember that batteries (in both RAID cards and UPSes) wear out  
and will eventually have to be replaced. It depends how critical your  
data is, but if you only have a UPS, you risk badness in the off  
chance that your power fails and you haven't replaced your UPS battery.

On Feb 27, 2007, at 12:27 AM, Peter Kovacs wrote:

> I wonder if running a machine on a UPS + 1 hot standby internal PS is
> equivalent, in terms of data integrity, to using battery backed write
> cache. Instinctively, I'd think that UPS + 1 hot standby internal PS
> is better, since this setup also provides for the disk to actually
> write out the content of the cache -- as you pointed out.

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