RAID 10 is striping across mirrored drives. So, if you have 4 x 1TB drives, think of it as two separate 1 TB volumes. The system will write half your data to volume A and the other half to volume B. The data in volume A and B do not overlap. Now, each volume is composed of a mirrored set of drives. Anything written to volume A is actually stored on two drives. Anything written to volume B is actually stores on the other two drives. Does this make sense? Let me know if you need any more explanation. Also, when you move to a hosted solution, I would appreciate your considering my company for it. Neil -- Neil Aggarwal, (281)846-8957, http://www.JAMMConsulting.com CentOS 5.4 KVM VPS $55/mo, no setup fee, no contract, dedicated 64bit CPU 1GB dedicated RAM, 40GB RAID storage, 500GB/mo premium BW, Zero downtime > -----Original Message----- > From: centos-bounces@xxxxxxxxxx > [mailto:centos-bounces@xxxxxxxxxx] On Behalf Of ML > Sent: Thursday, October 29, 2009 1:03 PM > To: CentOS mailing list > Subject: Re: Infrastructure HELP! > > Neil, > Can you explain how RAID 10 would work with 4 x 1tb drives? > > Should I just get 2 x 2tb drives and mirror? > > I probably dont need 4 x 1tb drives to start, maybe even 2 x 2tb. I > can't image this growing faster than I can get money to add more > equipment, move to Co-Lo, etc. > > On Oct 29, 2009, at 10:59 AM, Neil Aggarwal wrote: > > > > > If you want speed, use RAID 10. > > > > Neil > > > > -- > > Neil Aggarwal, (281)846-8957, http://www.JAMMConsulting.com > > CentOS 5.4 KVM VPS $55/mo, no setup fee, no contract, dedicated > > 64bit CPU > > 1GB dedicated RAM, 40GB RAID storage, 500GB/mo premium BW, Zero > > downtime > > > >> -----Original Message----- > >> From: centos-bounces@xxxxxxxxxx > >> [mailto:centos-bounces@xxxxxxxxxx] On Behalf Of ML > >> Sent: Thursday, October 29, 2009 12:57 PM > >> To: CentOS mailing list > >> Subject: Infrastructure HELP! > >> > >> Hi Everyone, > >> > >> I started a social networking site and I am getting ready > to go live > >> next week. I have limited fund as I am not funded yet (although > >> hopefully soon). > >> > >> I have an extra Mac Pro (I know, how can I possibly call a Mac Pro > >> dual 2.8 quad core with 16gb RAM extra). So Mac Pro quad Core, 16gb > >> RAM, 4 x 1tb RAID level Seagate drives. I was going to load > >> CentOS 5.4 > >> on it, web, mysql etc, etc. This is really the only box I have that > >> would handle the site it it takes off and then I would need to add > >> more hardware and most hosting to RackSpace or something. > >> > >> My question is about initial setup. The 4 x 1TB drives. How to set > >> this up for I have some protection? > >> > >> RAID 0+1? (striped + mirrored) I would end up with 2TB > useable space. > >> > >> RAID 5? so what one is a hot spare? 3TB useable space? > >> > >> What about striping the 4 1TB and mirroring that to a 4 x 1tb > >> External > >> drive enclosure? > >> > >> I want to be sure the data is protected, but machine resources and > >> money are limited. > >> > >> Thoughts are appreciated! > >> _______________________________________________ > >> CentOS mailing list > >> CentOS@xxxxxxxxxx > >> http://lists.centos.org/mailman/listinfo/centos > > > > _______________________________________________ > > CentOS mailing list > > CentOS@xxxxxxxxxx > > http://lists.centos.org/mailman/listinfo/centos > > _______________________________________________ > CentOS mailing list > CentOS@xxxxxxxxxx > http://lists.centos.org/mailman/listinfo/centos _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos