On Thu, November 14, 2013 12:51, Reindl Harald wrote:
Am 14.11.2013 18:23, schrieb James B. Byrne:
From what I have read it appears that the system disk must use RAID 1 if it uses RAID at all.
no!
/boot must be RAID1, see below md0: /boot md1: / md2: /data
[root@srv-rhsoft:~]$ cat /proc/mdstat Personalities : [raid1] [raid10] md2 : active raid10 sda3[4] sdb3[3] sdc3[5] sdd3[0] 3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 4/29 pages [16KB], 65536KB chunk
md1 : active raid10 sda2[4] sdb2[3] sdc2[5] sdd2[0] 30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 0/1 pages [0KB], 65536KB chunk
md0 : active raid1 sda1[4] sdb1[3] sdd1[0] sdc1[5] 511988 blocks super 1.0 [4/4] [UUUU]
So, this is saying, if I read it aright, that one can have multiple RAID arrays spread over the same spindles but each in differing partitions. Is that right?
I am just getting started with this so I am trying to fit what I am reading regarding RAID with what I have dealt with in the past, mainly LVM ext3 volumes. So I am doubtless just not getting it in some important way.
BTW, I intend to install CentOS-6.4 with software RAID as the eight disks are mounted in the system chassis. As far as I can tell, there is no hardware RAID controller (unless there is one on the MB, in which case SW Raid is likely a better choice anyway.
Regards,