Les Mikesell wrote: > Ruslan Sivak wrote: >> B.J. McClure wrote: >>> >>>> I would like to set up CentOS on 4 SATA hard drives that I would >>>> like to >>>> configure in RAID10. I read somewhere that Raid10 support is in the >>>> latest kernel, but I can't seem to get anaconda to let me create >>>> it. I >>>> only see raid 0, 1, 5, and 6. >>>> >>>> Even when I tried to set up raid5 or raid1, it would not let me put >>>> the >>>> /boot partition on it, and I though that this was now possible. >>>> >>>> Is it possible for me to set up the configuration I'm looking for? >>>> >>>> Russ >>>> >>> Cannot speak to raid 10 but have been running 4.4 an 5.0 with raid 1 >>> and /boot partition on md0 for some time. Have not seen the issue >>> you refer to. >>> >>> bj >>> >>> >> >> Well as far as Raid10, it's not even an option for the installer. If >> I do select raid1 for the entire array, I only get the space of 3 of >> the 4 drives, and the installer still complains that I cannot put >> boot on a raid system. >> Is there a how-to somewhere on getting this to work? > > I don't know if the installer will let you do it, but you are supposed > to be able to create RAID1 devices, then stripe across them by using > those md devices in a RAID0. I'm not sure if there is any advantage > to that over using LVM to combine the RAID1 devices though. > Personally I prefer to use RAID1 and deal with the space on separate > mounted partitions since it permits recovering the data from any > single drive but if I had to have a larger chunk I'd probably put > /boot on a RAID1 and the rest in mirrored partitions combined in LVM. I just did an install where i set up boot on raid1 (sda1,sdb1 with sdc1 and sdd1 as spares), swap on raid0 (sda2, sdb2, sdc2, sdd2) and then created 2 LVM partitions /dev/md2 (raid1 of sda3 and sdb3) and /dev/md3 (raid1 of sdc3 and sdd3). I then combine the 2 partitions in LVM and put root on it. Everything installed fine, but got stuck at the grub prompt. I am now trying to set up raid10 manually by using mdadm, but it gives me an error, and when looking at dmesg, it says "md: personality for level 10 is not loaded!". Does this mean that the currently compiled in kernel doesn't support raid10? Russ