topic Re: vgdisplay in Operating System - HP-UX

vgdisplay

Chen_7 — Tue, 19 Apr 2005 09:49:44 GMT

Hi. How can I check to see if root disk is mirrored or not and the sizes of the disk and mirror?

Re: vgdisplay

Rick Garland — Tue, 19 Apr 2005 09:53:54 GMT

There are a couple of commands.

The "lvlnboot -v" can help
Will display the swap, dump, boot, root areas. Should be 2 disks shown.

Doing "lvdisplay -v /dev/vg00/lvolX"
You should see extents being used on 2 disks.

Do you have MirrorUX installed?
swlist -l bundle | grep -i mirror

What about the setboot command? Do you have an alternate boot disk defined?

etc...

Re: vgdisplay

Peter Godron — Tue, 19 Apr 2005 09:54:02 GMT

Chen,
use SAM

Regards

Re: vgdisplay

Henk Geurts — Tue, 19 Apr 2005 09:55:56 GMT

hi chen

vgdisplay -v vg00
should show 2 disks.
all lv's should have 2 PV's if mirrored.

regards.

Re: vgdisplay

Robert-Jan Goossens — Tue, 19 Apr 2005 09:58:21 GMT

Hi,

# lvlnboot -v

# pvdisplay /dev/dsk/cxtydz

PE Size (Mbytes) X Total PE

Robert-Jan

Re: vgdisplay

Chen_7 — Tue, 19 Apr 2005 10:06:28 GMT

Hi.

Filesystem kbytes used avail %used iused ifree %iuse Mounted on
/dev/vg00/lvol3 524288 56855 438234 11% 3554 116858 3% /

# pvdisplay /dev/dsk/c0t0d0
--- Physical volumes ---
PV Name /dev/dsk/c0t0d0
VG Name /dev/vg00
PV Status available
Allocatable yes
VGDA 2
Cur LV 10
PE Size (Mbytes) 4
Total PE 4340
Free PE 989
Allocated PE 3351
Stale PE 0
IO Timeout (Seconds) default
Autoswitch On

Root filesystem size is 524mb as shown in bdf. PE SIZE * Total PE = 17GB. I used pvdisplay /dev/dsk/c1t0d0 (the mirror). Sme thing. So, is the root 17GB in size here? Then what does bdf show? Thanks.

Re: vgdisplay

Robert-Jan Goossens — Tue, 19 Apr 2005 10:13:41 GMT

No bdf is showing root filesystem /dev/vg00/lvol3 524 MB , complete disk is 18GB with about 4 GB free space.

Robert-Jan

Re: vgdisplay

Stephen Keane — Tue, 19 Apr 2005 10:15:30 GMT

bdf is showing you how much space the root filesystem '/' is occupying. There is more than one logical volume and more than one fileystem on the physical volume /dev/dsk/c0t0d0 which is 17Gbytes.

If you do an lvdisplay for /dev/vg00/lvol3

# lvdisplay /dev/vg00/lvol3

And look at the 'Mirror copies' line it should be non-zero if the logical volume is being mirrored.

Re: vgdisplay

Chen_7 — Tue, 19 Apr 2005 10:21:34 GMT

Hi. I am a bit confused.

# lvdisplay /dev/vg00/lvol3
--- Logical volumes ---
LV Name /dev/vg00/lvol3
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 512
Current LE 128
Allocated PE 256
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default

So, I think the root system is 500 MB. Complete disk is 18GB. Can I make root and its mirror 9GB here? Is it possible? What;s the method?

Re: vgdisplay

Stephen Keane — Tue, 19 Apr 2005 10:29:02 GMT

The root fileystem '/' mounted on /dev/vg00/lvol3 IS mirrored (there is one mirror copy). It is 512 Mbytes in size.

If you run lvdisplay -v on /dev/vg00/lvol3

# lvdisplay -v /dev/vg00/lvol3

You will see which physical volumes it is written on. (Under the logical extents section).

Re: vgdisplay

Chen_7 — Tue, 19 Apr 2005 10:32:58 GMT

How can I increase root size to 9 gb? How do I know if it's possible?

Re: vgdisplay

Robert-Jan Goossens — Tue, 19 Apr 2005 10:35:19 GMT

HPUX uses seperate filesystems for /(root), /stand(kernel), /var, /usr, /opt and /tmp.

If you mirror filesystems you will need to mirror them to an other disk.

# vgdisplay -v vg00

why would you need to have /(root filesystem 9GB ?

Re: vgdisplay

MarkSyder — Wed, 20 Apr 2005 02:52:48 GMT

When you refer to increasing root to 9 Gb, I take it you mean the / filesystem.

If you really need to do this, you would need to restore from ignite, but I think most of us here would advise against it. Think carefully about what you want to put in that 9 Gb. You can almost certainly find a more appropriate filesystem for it.

Mark Syder (like the drink but spelt different)