on 7-2-2008 3:14 PM Victor Padro spake the following:
Raid 5 need a minimum of 3 drives. The only way to get 2 drives in software raid is to create the array with the "missing" statement."It is human nature to think wisely and act in an absurd fashion.""Todo el desorden del mundo proviene de las profesiones mal o mediocremente servidas"On Wed, Jul 2, 2008 at 11:08 AM, Scott Silva <ssilva@xxxxxxxxxxxx <mailto:ssilva@xxxxxxxxxxxx>> wrote:on 7-2-2008 8:52 AM Victor Padro spake the following: On Wed, Jul 2, 2008 at 8:50 AM, Rudi Ahlers <Rudi@xxxxxxxxxxx <mailto:Rudi@xxxxxxxxxxx> <mailto:Rudi@xxxxxxxxxxx <mailto:Rudi@xxxxxxxxxxx>>> wrote: nate wrote: Rudi Ahlers wrote:I think my action plan now will be to figure out how toinstall CentOS on a USB memory stick and make it boot on any machine (making it easy to replace if need be), and then to play around with the RAID a bit and see how well it works.Another option you may want to consider is a PATA->CF adapter. I use these for my OpenBSD firewalls and have them installed on 1GB CF cards. Performance should be better? Compatibility certainly is better, there's no way I could boot to USB off these aging P3-800 systems. The CF cards just show up as regular HDs I use these ($7):http://www.geeks.com/details.asp?invtid=SY-ADIDE2CF-B1&cpc=SCH<http://www.geeks.com/details.asp?invtid=SY-ADIDE2CF-B1&cpc=SCH><http://www.geeks.com/details.asp?invtid=SY-ADIDE2CF-B1&cpc=SCH<http://www.geeks.com/details.asp?invtid=SY-ADIDE2CF-B1&cpc=SCH>> Paired with Lexar CF cards. Not all CF is created equal, well maybe it is today. I found my Lexar CF cards were 5-10x faster than my Kingston cards of the same size, which surprised me. Not that I need high performance in firewalls that do no disk I/O but it was painful for the OS install to take hours(Kingston) instead of minutes(Lexar). Both pairs of CF cards are a few years old, today maybe everything out there is reasonably fast. At least with the above adapters be aware that those adapters above do stick up. I think a 2U chassis can fit them(I have tons of experience in supermicro systems). But no guarantees. You may need another adapter or perhaps a male to female IDE cable so that you can mount it another way in the chassis. I suppose you could even get two and run RAID. Just don't put your swap on the flash if you can avoid it. nate ______________________________________________ Thanx, nate That's a good suggestion, but I think the USB memory sticks could work better / more reliable, and will be easier to access in the cabinet. I'll play around with it a bit and see how it works. -- Kind Regards Rudi Ahlers CEO, SoftDux Web: http://www.SoftDux.com Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff, or visit http://www.WebHostingTalk.co.za for Web Hosting stuff _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx <mailto:CentOS@xxxxxxxxxx> <mailto:CentOS@xxxxxxxxxx <mailto:CentOS@xxxxxxxxxx>> http://lists.centos.org/mailman/listinfo/centos Hi, (I apologize in advance if someone thinks this is OT) I've been reading this thread since it started, and what I could really say is you should go for freenas, it can be installed in a matter of minutes in a usb pendrive, I use it on a 2gb kingston one using an IBM eServer tower chassis, Intel D201GLY2 mainboard, 1Gb 667Mhz RAM, 2 HDs those are 750gb SATA in RAID5 2 drives in raid5? Then it is really only a raid 0, and will fail sooner or later. Even if it's fake RAID5(RAID software)? Didn't know that.
With only 2 drives, you have a stripe with a failed parity. So 2 drives is already missing one, and the next failure is doom. Raid 1 (mirror) is fine with 2 drives. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!!
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