Date: Wed, 12 Nov 2008 22:13:58 -0800 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: TJ Varghese <tj@tjvarghese.com> Cc: lenzi@k1.com.br, freebsd-questions@freebsd.org, VeeJay <maanjee@gmail.com> Subject: Re: Any help about FreeBSD & Dell's Troubleshooting Tool DSET Message-ID: <20081113061358.GA12351@icarus.home.lan> In-Reply-To: <c7f2adc20811122143v2965aeb5nab6ed119f2e9935b@mail.gmail.com> References: <2cd0a0da0811120701r7c57bd6btf7640440dbb11035@mail.gmail.com> <1226506819.1615.18.camel@k2.cwb.casa> <c7f2adc20811122143v2965aeb5nab6ed119f2e9935b@mail.gmail.com>
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On Thu, Nov 13, 2008 at 01:43:46PM +0800, TJ Varghese wrote: > On Thu, Nov 13, 2008 at 12:20 AM, Sérgio de Almeida Lenzi > <lenzi@k1.com.br>wrote: > > > Hello > > > > <snip> > > > > the best configuration I used is to use RAID-0 (no raid) > > on the controller and g mirror on the FreeBSD (that is I use > > the mirror in software) mainly because the Freebsd kernel > > is, in this manner, can detect problems with the drivers > > and so, can act on it.... > > <snip> > > > Do not use RAID-0! What you want is JBOD and freebsd's software raid. > RAID-0 does striping over both drives...if one drive is dead you're screwed. There is nothing inherently wrong with RAID-0. For example, prior to having a machine that supported more than 3 disks, I used gstripe(8) heavily on my home FreeBSD box. I was **very** well-aware of the negative aspects of RAID-0 (one disk dies, you lose the entire filesystem). Which is why I performed backups. Daily. My point: RAID-0 is fine to use, as long as you're doing backups often, and accept what will happen if one of your disks goes bad. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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