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 at 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, -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB at Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3