primary swap position on disk

[Unix Administrator_5]

I have had conflicting answers to this over the years, but now I really need to know.

Does primary swap have to come immediatley after /dev/vg00/lvol1 on the boot disk.

I have run it, by accident, from other locations on the disk.

Is this a problem?

[A. Clay Stephenson · Accepted solution]

No, the requirements are /, /stand, and primary swap must be on the boot disk and that the each of these logical volumes be contigiously allocated. This does not imply that each of these LVOL's must be located adjacent to each other.

[Sandip Ghosh]

There is no rule like that. Actually if you look at the system during installation it first creates the root file system and then it is creating the swap partition. That is why it is taking the lvol2. But you can keep it any where, the only thing is that it has to be contiguous.

Sandip

[MANOJ SRIVASTAVA]

It can be defined any where but bcoz it moer to do with internal disk faster access so it is genrally defined in boot disk . Here is a intresting thread :

http://groups.google.com/groups?q=primary+swap+on+root+disk&hl=en&selm=vbol7tgsva5me55ou9ceacju8s638i8tq4%404ax.com&rnum=2


Manoj Srivastava

[Helen French]

Hi,

I agree with Clay. But one important thing is that when you configure your dump_lv with lvlnboot command. If you use the primary swap as the dump_lv, then it should fall within the first 4GB of the root disk ( first 2GB if you use the old SCSI cards). This depend on the version of the iodc firmware on the boot interface PCA. Some new hardware interfaces may support up to 8TBs. If you configure seperate dump_lv, this doesn't matter.

# man lvlnboot - for more details.

HTH,
Shiju