admin wrote: > I believe that if /boot is on RAID1, that md partition has to be on one > of the first two disks (eg hda, hdb)? > > Is there any problem with having /boot on a RAID1 partition across 4 > disks as follows? > > /boot / (LVM) > hda RAID1 RAID5 > hdb RAID1 RAID5 > hdc RAID1 RAID5 > hdd RAID1 RAID5 >
The boot loader (GRUB) must be installed in the MBR on a hard disk from which the BIOS can boot. With 4 disks, you can install GRUB on all disks, so you can boot even if the first 2 disks fail. I think it doesn't matter if /boot is the first or another md raid device. It just must not be a LVM. > What about swap? It is best on RAID1, RAID5, LVM, something else or > doesn't matter? we're using swap via LVM without any performance problems. but my opinion is if a server begins to swap things will get slow anyway no matter what type of disk you're using for swap (maybe excluding flash drives / ramfs). > > Mick > _______________________________________________ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
