Messages in this thread | | | Date | Fri, 4 Jul 2003 09:06:23 +0200 | From | Andries Brouwer <> | Subject | Re: bsd disklabel and swap |
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On Fri, Jul 04, 2003 at 02:17:20PM +1000, Daniel Cavanagh wrote:
> i'm having a problem with a bsd disklabel and swap. > my /dev/hda disk look like this > > partition 1: fat > partition 2: ext2 > partition 3: openbsd > > it is a standard bsd disklabel with a as root and b as swap. this means > that /dev/hda6 should be the swap partition. but "swapon /dev/hda6" > prints "swapon: /dev/hda6: Invalid argument". it also prints that for > any other valid partition. if i put this in /etc/fstab, on boot the > kernel will print "Unable to find swap-space signature" before swapon > prints the above message. but if i use /dev/hda3 instead, swapon will > accept it and add a 512Mb swap, which is the correct size. but it > appears that rather than writing at the start of the swap it starts > writing at the start of the openbsd partition so my root partition is > being corrupted. have i screwed or have you guys screwed up?
This sounds like user confusion.
A partition becomes a Linux swap partition by writing "SWAPSPACE" somewhere at the beginning. (Yes, I know the details, don't tell me.) If this signature is missing, the kernel refuses to swap to the partition, in order to protect your data in case of a typo in the swapon command. The signature is written by the mkswap(8) command. Use it.
Andries
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