Re: install Etch with raid level 10
On Thu, Sep 27, 2007 at 01:25:33PM +0200, Giacomo Mulas wrote:
> yes, but I suppose you get this latter benefit as well just using two swap
> partitions at the same priority, since the kernel will try and do striping
> anyway. Indeed, swapouts should be faster using 2 swap partitions without
> raid1, since in this case the kernel ought to write pages to the two disks
> at once. So, summing up:
> - swap on raid1 swaps out at the speed of the slowest disk, swaps in at the
> sum of the speeds of the two disks, but the system will stay up and running
> even in the case of failure of one of them;
> - swap on 2 disks (no raid1) swaps both out and in at the sum of the speed
> of the disks, but failure of any one of the disks brings down your
> system in flames, possibly trashing cached data in the process.
>
> Correct?
Something like that. The crash issue on disk failure though makes
seperate swap so not worth considering. The idea of raid was to avoid
data loss due to drive failure, not to make it more likely.
--
Len Sorensen
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