Thnaks john, u gave me a grt idea .. the second one seems quite interestin but i do have to get additional HDD and mirror my existing server which has jus one disk thnks and regards simon > John R Pierce wrote: >> Johnny Hughes wrote: >>> The easiest way to make that happen is to use a product called DRBD >> >> do be aware, drbd replicas are not 'safe' for things like transactional >> databases, unless they are configured to be synchronous (such that a >> fsync doesn't return until its written on both the local disk AND the >> replica), which slows everything way down. > > If you can tolerate a small amount of downtime, a more simple-minded > approach is to get servers with swappable drive carriers, set up your > production servers with all partitions on raid1, and keep a spare > similar chassis around. Then if a single drive dies (the most likely > failure), you just swap in a new one and resync the mirrors. If the > motherboard or power supply dies, you swap the drives into the spare and > come up in the time it takes to reboot (you'll probably have to fix the > NIC setup for the different hardware addresses, though.). > > -- > Les Mikesell > lesmikesell at gmail.com > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > -- Network ADMIN: -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.