On Fri, Jan 29, 2010 at 8:09 PM, Ian Blackwell <ian at ikel.id.au> wrote: > On 30/01/2010 12:09 PM, Victor Padro wrote: >> Hello, >> >> I was wondering if someone could help me, > I'll try... >> I want to use one array with the 2 500GB HDDs in RAID1 for the OS and >> for some VMs, > That will work OK. >> and the other 4 1TB HDDs I want to create an array in >> RAID5 or RAID10 for file sharing across my home Network. >> > You can use these disks in a RAID5 array, but not RAID10. I fairly sure > you need more than 4. RAID10 is mirrored, so you only have "2" disks in > the array, which isn't enough for parity/striping stuff. You need at > least "3", which would mean 6 disks for RAID10. > > Having said that, I'm assuming you want to use the entire hard disk as a > participant in an array. You could create 2 x 500Gb partions on each > disk and then you have 8 x 500Gb partitions to use in a RAID10 array. > This approach sacrifices some redundancy though. If a disk dies > entirely, then you will lose two participants in the RAID array, which > may or may not be catastrophic - it depends on what you put where... >> I found a guide but it's a little bit outdated and it's for Debian... >> >> Do you have any other pointer I can read/use? >> > http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5 > > I've mostly installed RAID arrays at install time, which you'll need to > do as well if you want to put the OS on a RAID1 array. >> >> TIA. >> >> > Ian > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > Thank you Ian, but I disagree in your concept of RAID10: [quote] RAID 10 RAID 1+0 (or 10) is a mirrored data set (RAID 1) which is then striped (RAID 0), hence the "1+0" name. A RAID 1+0 array requires a minimum of four drives: two mirrored drives to hold half of the striped data, plus another two mirrored for the other half of the data. In Linux MD RAID 10 is a non-nested RAID type like RAID 1, that only requires a minimum of two drives, and may give read performance on the level of RAID 0. [quote] I'll read that howto, is for fakeRAID though... TIA -- Linux User #452368 http://twitter.com/vpadro "Everything that irritates us about others can lead us to an understanding of ourselves"