Am 09.12.2010 16:44, schrieb Neil Bothwick: > On Thu, 09 Dec 2010 15:53:24 +0100, Stefan G. Weichinger wrote: > >> I never did RAID1 with more than 2 disks, you suggest something like: >> >> mdadm --create /dev/md0 --level=1 --raid-disks=6 /dev/sd[abcdef]1 >> > > Yes
fine >> This would result in /dev/md0 having a usable size of 3 disks? > > No, the size is that of one disk. The reason for using all disks is that > otherwise the space would go unused and this way you can boot from any of > the disks in the event of failures. Sure, understood. Didn't really know about the resulting size ... interesting, but logical ;) > I've never tried it with 6, but my desktop is set up like this with a > three disk RAID1 for / and LVM on RAID5 for everything else. So I would have to install GRUB in all 6 MBRs as well, sure ... Wouldn't it be even more efficient (in terms of not wasting space) to create that 6-devices-RAID1 smaller, for /boot and a second array, with RAID6, for / ? Less space wasted, higher redundancy for / ... ? Sounds good to me right now (I will see if it changes after hitting SEND). Stefan
