Rick Thomas a écrit : > > I configure a small (<1GB) "/boot" partition as a primary partition > (e.g. /dev/sda1) on one of the disks, with the same space on the other > disk unused. [1]
(...) > The two swap partitions I set up as a RAID0 (e.g. /dev/md0). This will > be my system swap. [2] (...) > [1] I know there are ways to make grub work with RAID1, but it's too > complicated for me to get it right. 1) Set up /boot as RAID 1 (or 5, 6, 10). 2) grub install /dev/sda ; grub install /dev/sdb How is that complicated ? > [2] There's no particular point in putting swap on a redundant RAID. Yes there is : system availability. Defective swap may have the same catastrophic effect as defective memory. RAID is not only about data redundancy. Redundancy is used to allow the system to tolerate a disk fault and continue to operate untill you decide to replace the faulty disk. But maybe you don't care about your system availability. > If your swap develops a bad spot, you probably want to boot from a CD > into rescue mode ASAP so you can take necessary measures to fix the > problem. Using RAID1 for swap would just mask the problem - possibly > until it's too late. Are you serious ? Mdadm monitoring can warn you as soon as a faulty disk is detected, allowing you to take appropriate action while the system is still operating. Without redundancy, a defective swap may cause the system to misbehave or even crash at any time without any warning ! > [3] Conversely, everything else on the system wants to be redundantly > protected. Why ? If you don't care about availability, just restore from the backup. No need for RAID.
