On Wed, Aug 08, 2012 at 04:25:01PM +0300, Georgi Naplatanov wrote: > Hi. > > I'm going to configure Debian GNU/Linux with software RAID 1 and I > think to put swap area on RAID 1 (/dev/mdX), but someone told me > that if the computer have multiple swap partition (e.g. /dev/sda2, > /dev/sdb2) with equal priorities, linux kernel will mirror swap area > between different devices. Is that true ? I mean kernel 2.6.32 and > 3.2.x. > I suggest you consider whether you need redundancy for your swap parition. What protection are you getting by putting it on RAID? Basically, if a hard drive fails while the system is using swap, then the swapped data is safe. If you didn't use RAID and that scenario occurred, what would happen? Would a program crash? Is that acceptable to you?
I've set up drives like this before: /dev/sda1 - swap /dev/sdb1 - swap /dev/sda2 - RAID1 --> /dev/md0 /dev/sdb2 - RAID1 --> /dev/md0 I'm not claiming it's the best way. I save a little bit of hard drive space (which is very cheap anyway), and I accept the risk of crashing a program *if* the system is swapping while a hard drive dies (a pretty low probability). Basically low risk and low payoff unless you're using very expensive disks or have mission-critical applications running. -Rob -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120808212017.ga4...@aurora.owens.net