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Date: Thu, 2 Nov 2006 06:34:46 -0800
From: "Joshua Schmidlkofer" <joshland@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] BIG reiserfs problem
In-Reply-To: <45486EB8.5030305@paradise.net.nz>
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References: <d03887390610280316t38f83b1fi778dc46572d3a463@mail.gmail.com>
<200610310917.48293.alan@linuxholdings.co.za>
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> While this is true, it also may dramatically lower the mean time to
> failure for your disk, due to increased ware and tear - consumer ATA
> drives are designed to operate with the write cache on.
>
> If you cannot afford to lose data due to poweroff corruption, then the
> only viable solution is a RAID card that includes battery backup (e.g.
> 3Ware and Areca sell these).
>
Mark,
Thank you for clarifying. My comments were obscure and poorly
worded. You are correct. If one requires supreme data-safety with an
ATA drive, one must do things that will ultimately be
counter-productive for the longevity of your disks. Furthermore, (I
can fully attest) that they will be a significant hit on performance.
If you need high safety, speed, and retention, then the 3ware +
Battery backup is a low-cast solution. There are tons of higher cost
ones. most of me servers run with battery-backed RAID cards.
I also like to make scripts to remount the FSs with -o sync in the
case of power outage. That way, just in case the UPS actually fails
early (which happens at times), I don't lose data. I have had that
preference no matter what FS i use.
sincerely,
Joshua
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