trouble adding additional drive to vg00 to increase swap

[mike worrell]

I have added an additional drive to vg00 so I can increase my swap space on /dev/vg00/lvol2.
When I tried to increase swap it said no additional physical extents available.

Did a vgdisplay -v vg00 and looked at the additional drive and saw this
PV Name /dev/dsk/c0t0d0
PV Status available
Total PE 250
Free PE 250

It's a 1gb drive and I did pvcreate on it.
What can I do to free it up so I can use it?
Never had this happen before.

Thanks for any help I can get.
Mike

[Pete Randall]

Mike,

Swap space needs to be contiguous. Add a secondary swap volume (you can use SAM, even) and set the priority the same as primary. That should do it.


Pete

[Tim Adamson_1]

Swap must be contigous. Most likely you don't have any free PEs next to the last allocated PE for lvol2.

So just create a second swap logical volume. Make sure it is contigous and bad block relocation is off (-C y -r n)

If in doubt, use SAM to do it.


Tim

[James R. Ferguson]

Hi Mike:

Swap space must be contiguous(ly) allocated, so expanding primary swap isn't possible. Instead, all you need to do is create secondary device swap (one or more) as another logical volume. I suggest creating the secondary swap on a volume group other than vg00 and then setting its swap priority to a higher value (lower number, here zero) than the swap priority of primary swap which is one. In this way, preference is given to utilizing secondary swap before primary, reducing any I/O to you vg00.

Of course, you never want to swap. You should have adequate physical memory for your process needs; turn on the kernel 'swapmem_on' and therefore only use swap space for memory reservation because you have adequate memory in the first place never to have to swap (page).

Regards!

...JRF...

[George_Dodds]

Did you run a vgextend on the volume group to add the disk to the group?

#vgextend /dev/vg00 /dev/dsk/c0t0d0

Assuming you want to add swap using all 250 extents available in vg00.

#lvcreate -l 250 -n swap2 -C y /dev/vg00

#swapon -p 1 /dev/vg00/swap2

#swapinfo -mat

then add entry in /etc/fstab file.

Ta

George

[George_Dodds]

Ignore my vgextend reference i misread your question.....need more coffee!!

Ta

George

[mike worrell]

Thanks everyone for your answers, going to try them now. I just assigned the points to each of you, let me know if you don't get them and I"ll resubmit the point
Thankkkkkk ya
Mike

[Pete Randall]

Mike,

I think you might have to try the point thing again (and possibly again).


Pete

[mike worrell]

I added my swap by adding the drive to a new volume group, created using SAM a lv called swap, made it swap with pri of 2 and 500 mb

System rebooted , now for some reason it will not mount my file systems automatically. If I do a more on /etc/fstab and mount by hand all is ok. What can I do to fix
Mike