On Sun, September 7, 2014 9:30 pm, John R Pierce wrote:
On 9/7/2014 7:19 PM, Dave Stevens wrote:
I want to set up a new CentOS install using version 7 and would like to experiment with various RAID levels. Anyone care to point out a tutorial?
how many drives do you have for this experiment? whats the target usecase for the file systems on the raid(s)? whats the level of data resiliance required by said use case?
Raid only protects against one specific sort of failure, where an entire disk drive fails. It doesn't protect against data corruption, or system failure,
Even more: system failure or power loss is more likely to destroy all data on software RAID than on a single drive when there is a lot of IO present (to the best of my understanding, loss of cache software RAID is using is more catastrophic compared to journaled filesystem under same circumstances - somebody may correct me). So, there may be worth thinking about hardware RAID.
Just my 2c.
Valeri
or software failure or any other catastrophes.
-- john r pierce 37N 122W somewhere on the middle of the left coast
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++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++