Jeronimo Calvo wrote:
Hi folks,I'm thinking to build a Raid on my system and I'm getting documented abut 0+1 and 1+0 RAID systems. As far as I can see the best option is a 1+0 is the best option as if one of the from mirrors fails, the RAID still be redundant and in the case of a 0+1 RAID, If one of them fails, the RAID will be down until u replace the HD in question... So my question is, if I am right above, what are de benefits of mounting a RAID 0+1 ??
For workloads that involve streaming large volumes of sequential data RAID 0+1 can perform very well. However, for the typical sort of workloads seen on a general purpose workstation, it offers no advantages over RAID10, and for the sort of workload you get with RDBMSes -- lots of randomly scattered small IOs -- RAID10 does the business. Given the poor resilience characteristics of RAID 0+1 the sequential data streaming workload would be better handled by RAID5(0) or RAID6(0) plus a good hardware RAID controller with plenty of battery backed cache RAM. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW
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