On Fri, Jan 29, 2010 at 9:09 PM, Ian Blackwell ian@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I found a guide but it's a little bit outdated and it's for Debian...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
RAID10 does not use parity, it's just a mirror of stripes, so 4 disks will work perfectly fine with it.
Use RAID10 for speed, and RAID5 if the space is more of an issue. With RAID10 you lose 1/2 the total space, and with RAID5 you lose 1 disk's worth.