how to check if i have still free 20g local disk?

[Aristotle]

I would like to know if i have still 20g of free disk space as local disk.

[Sharma Sanjeev]

Hi Aristotle

Do pvdisplay /dev/dsk/c?t?d? on disk you want to check space.
Look for Free PE and PE Size
Multiply PE Size and Free PE you will get free space in Disk.

Regards
Sanjeev

[Aristotle]

# strings /etc/lvmtab
/dev/vg00
/dev/dsk/c0t6d0
/dev/dsk/c4t6d0
/dev/vgdev
/dev/dsk/c39t3d7
/dev/dsk/c39t4d0
/dev/dsk/c39t4d1
/dev/dsk/c39t4d2
/dev/dsk/c39t4d3
/dev/dsk/c39t4d4
/dev/dsk/c39t4d5
/dev/dsk/c39t4d6
#

is this the way to know your disks? sorry i am just new here

[Torsten.]

I think these are your local disks:

/dev/vg00
/dev/dsk/c0t6d0
/dev/dsk/c4t6d0

Just do a

# vgdisplay -v vg00

to see the amount of unallocated space.

[Aristotle]

thanks, how to know that was my local disk? Could explain a little further?

anyway see below.

# vgdisplay -v vg00
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 11
Open LV 11
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4350
VGDA 4
PE Size (Mbytes) 8
Total PE 8680
Alloc PE 8285
Free PE 395
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
LV Name /dev/vg00/lvol1
LV Status available/syncd
LV Size (Mbytes) 112
Current LE 14
Allocated PE 28
Used PV 2

LV Name /dev/vg00/lvol2
LV Status available/syncd
LV Size (Mbytes) 2048
Current LE 256
Allocated PE 512
Used PV 2

LV Name /dev/vg00/lvol3
LV Status available/syncd
LV Size (Mbytes) 1024
Current LE 128
Allocated PE 256
Used PV 2

LV Name /dev/vg00/lvol4
LV Status available/syncd
LV Size (Mbytes) 3000
Current LE 375
Allocated PE 750
Used PV 2

LV Name /dev/vg00/lvol5
LV Status available/syncd
LV Size (Mbytes) 2048
Current LE 256
Allocated PE 512
Used PV 2

LV Name /dev/vg00/lvol6
LV Status available/syncd
LV Size (Mbytes) 7104
Current LE 888
Allocated PE 1776
Used PV 2

LV Name /dev/vg00/lvol7
LV Status available/syncd
LV Size (Mbytes) 5000
Current LE 625
Allocated PE 1250
Used PV 2

LV Name /dev/vg00/lvol8
LV Status available/syncd
LV Size (Mbytes) 6304
Current LE 788
Allocated PE 1576
Used PV 2

LV Name /dev/vg00/lvol9
LV Status available/syncd
LV Size (Mbytes) 8000
Current LE 1000
Allocated PE 1000
Used PV 1

LV Name /dev/vg00/lvolFTP
LV Status available/syncd
LV Size (Mbytes) 5000
Current LE 625
Allocated PE 625
Used PV 2

LV Name /dev/vg00/lvol11
LV Status available/syncd
LV Size (Mbytes) 0
Current LE 0
Allocated PE 0
Used PV 0


--- Physical volumes ---
PV Name /dev/dsk/c0t6d0
PV Status available
Total PE 4340
Free PE 0
Autoswitch On
Proactive Polling On

PV Name /dev/dsk/c4t6d0
PV Status available
Total PE 4340
Free PE 395
Autoswitch On
Proactive Polling On


#

[Sharma Sanjeev]

Hi Aristotle

these are your local disks
/dev/dsk/c0t6d0
/dev/dsk/c4t6d0
which belongs to root vg if you want to see free space in this do
vgdisplay -v vg00 or pvdisplay /dev/dsk/c0t6d0

Regards
Sanjeev

[Torsten.]

...

PE Size (Mbytes) 8
Total PE 8680
Alloc PE 8285
Free PE 395
...

8MB * 395 PE = 3160 MB free


If you want to know what disks are internal, please post

# model
# ioscan -fn

[Sharma Sanjeev]

Hi

But here 395 PE's are free only on disk /dev/dsk/c4t6d0 which is mirrored disk and on primary disk no PE's are free as you can see lvol9 is in one PV only.
That's why 395 PE's are free in Second disk.

Regards
Sanjeev

[Aristotle]

@torsten,ok thanks please indicate how to know the local disk
#model
9000/800/S16K-A
# ioscan -fnC disk
Class I H/W Path Driver S/W State H/W Type Description
==========================================================================
disk 394 0/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GMAN3367MC
/dev/dsk/c0t6d0 /dev/rdsk/c0t6d0
disk 393 0/0/0/2/1.2.0 sdisk CLAIMED DEVICE HP DVD-ROM 305
/dev/dsk/c1t2d0 /dev/rdsk/c1t2d0
disk 543 0/0/2/0/0.104.14.0.0.0.0 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t0d0 /dev/rdsk/c82t0d0
disk 574 0/0/2/0/0.104.14.0.0.3.7 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t3d7 /dev/rdsk/c82t3d7
disk 587 0/0/2/0/0.104.14.0.0.4.0 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d0 /dev/rdsk/c82t4d0
disk 588 0/0/2/0/0.104.14.0.0.4.1 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d1 /dev/rdsk/c82t4d1
disk 589 0/0/2/0/0.104.14.0.0.4.2 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d2 /dev/rdsk/c82t4d2
disk 590 0/0/2/0/0.104.14.0.0.4.3 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d3 /dev/rdsk/c82t4d3
disk 591 0/0/2/0/0.104.14.0.0.4.4 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d4 /dev/rdsk/c82t4d4
disk 592 0/0/2/0/0.104.14.0.0.4.5 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d5 /dev/rdsk/c82t4d5
disk 593 0/0/2/0/0.104.14.0.0.4.6 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c82t4d6 /dev/rdsk/c82t4d6
disk 406 0/0/8/0/0.103.14.0.0.0.0 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t0d0 /dev/rdsk/c39t0d0
disk 475 0/0/8/0/0.103.14.0.0.3.7 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t3d7 /dev/rdsk/c39t3d7
disk 476 0/0/8/0/0.103.14.0.0.4.0 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d0 /dev/rdsk/c39t4d0
disk 477 0/0/8/0/0.103.14.0.0.4.1 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d1 /dev/rdsk/c39t4d1
disk 478 0/0/8/0/0.103.14.0.0.4.2 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d2 /dev/rdsk/c39t4d2
disk 479 0/0/8/0/0.103.14.0.0.4.3 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d3 /dev/rdsk/c39t4d3
disk 480 0/0/8/0/0.103.14.0.0.4.4 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d4 /dev/rdsk/c39t4d4
disk 481 0/0/8/0/0.103.14.0.0.4.5 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d5 /dev/rdsk/c39t4d5
disk 482 0/0/8/0/0.103.14.0.0.4.6 sdisk CLAIMED DEVICE EMC SYMMETRIX
/dev/dsk/c39t4d6 /dev/rdsk/c39t4d6
disk 395 1/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c4t6d0 /dev/rdsk/c4t6d0
disk 396 1/0/0/3/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c6t6d0 /dev/rdsk/c6t6d0
#

[Torsten.]

This is a rp8400.

Local disks are

disk 394 0/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GMAN3367MC
/dev/dsk/c0t6d0 /dev/rdsk/c0t6d0

disk 395 1/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c4t6d0 /dev/rdsk/c4t6d0

disk 396 1/0/0/3/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c6t6d0 /dev/rdsk/c6t6d0



Based on the information above the disk /dev/dsk/c6t6d0 looks still unused.

[Sharma Sanjeev]

Hi Aristotle

The Disks Showing CLAIMED DEVICE EMC SYMMETRIX are your disk from Storage and
disk 394 0/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GMAN3367MC
/dev/dsk/c0t6d0 /dev/rdsk/c0t6d0
disk 395 1/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c4t6d0 /dev/rdsk/c4t6d0
disk 396 1/0/0/3/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c6t6d0 /dev/rdsk/c6t6d0

Regards
Sanjeev

[Aristotle]

now i understand, but if it is unused? How can i used it?

# pvdisplay /dev/dsk/c6t6d0
pvdisplay: Couldn't find the volume group to which
physical volume "/dev/dsk/c6t6d0" belongs.
pvdisplay: Cannot display physical volume "/dev/dsk/c6t6d0".
#

Thanks to you all. I now understand how to differentiate my local disk from storage disk

[Sharma Sanjeev]

Hi Aristotle

You have to do pvcreate /dev/dsk/c6t6d0
than you can use this disk.
2. You have to assign this disk to any VG than only you can use this disk

E.G
you have to do
pvcreate /dev/dsk/c6t6d0
vgextend /dev/vg00 /dev/dsk/c6t6d0 ( If you want to extend VG00)
otheriwse with any other vg.

Regards
Sanjeev

[Aristotle]

pvcreate /dev/dsk/c6t6d0
vgextend /dev/vg00 /dev/dsk/c6t6d0

What if i want to create another filesystem?
Or another vg is it possible? Anyway thanks.

For the mean time how will i know the size of /dev/dsk/c6t6d0 ius there anyway?

[Sharma Sanjeev]

Hi Aristotle

Typo in last reply u have to use rdsk in place of /dev/dsk/c6t6d0 while doing pvcreate

E.G
you have to do
pvcreate /dev/rdsk/c6t6d0
vgextend /dev/vg00 /dev/dsk/c6t6d0 ( If you want to extend VG00)
otheriwse with any other vg.

Regards
Sanjeev

[Torsten.]

You may use SAM to create a new VG and LVOL with this disk.

For the size you can use "diskinfo", but even the identifier is telling you:

HP 36.4GST336752LC

It's a 36GB disk.

[Sharma Sanjeev]

Hi Aristotle

You can create aonther Vg using this disk
e.g
Yes, you can create another file system after extending you VG and even you can create new vg also if you want using this disk.

To Know Size of disk :
diskinfo /dev/rdsk/c6t6d0

Regards
Sanjeev

[Aristotle]

@torsten
At first look how will you know the disk /dev/dsk/c6t6d0 is unused? Also you could easily indentify
that the machine is rp8400.
Thanks

This is a rp8400.
Local disks are

disk 394 0/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GMAN3367MC
/dev/dsk/c0t6d0 /dev/rdsk/c0t6d0

disk 395 1/0/0/2/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c4t6d0 /dev/rdsk/c4t6d0

disk 396 1/0/0/3/0.6.0 sdisk CLAIMED DEVICE HP 36.4GST336752LC
/dev/dsk/c6t6d0 /dev/rdsk/c6t6d0

Based on the information above the disk /dev/dsk/c6t6d0 looks still unused.

[Aristotle]

Ei guys no need to reply i get it in /etc/lvmtab.
thanks a lot for helping us.

[Sharma Sanjeev]

At first look how will you know the disk /dev/dsk/c6t6d0 is unused ?

The disk /dev/dsk/c6t6d0 was not in strings /etc/lvmtab output

Regards
Sanjeev

[Aristotle]

I am creating one now. Maybe you could give some tips.
thanks

[ Modify Default Volume-Group Options... ]
Maximum Physical Extents: 8683
Maximum Logical Volumes: 255
Maximum Physical Volumes: 16
Physical Extent Size (Mbytes): [ 4 ->]

Configure Selected Disk Into a PVG? [ No ]

LV Name: Usage: [ File System ->]
LV Size (Mbytes): Mount Directory:
Approx.Free Mbytes:34728 Defaults:VxFS,RW, Mount Now/Boot

[ Modify LV Defaults] [ Modify FS deaults..]

General â â Mirroring â â Striping
\â â â â â â â â â â â â â â â â â â â â â â â
[X] Use Bad Block Relocation
[ ] Use Contiguous Allocation



File System Attributes:

FS Type: [ Journaled (VxFS) ->]

Access: [ Read/Write ->]



[X] Enable Set User ID Execution

[ ] Allow Large Files

[Sharma Sanjeev]

Aristotle

Are you going to create new VG or extending old one ?

use command line that will be easy and fast.

E.g

pvcreate /dev/rdsk/c6t6d0
mkdir /dev/newvg
ll /dev/*/group ( Use new Number which is not listed)
mknod /dev/newvg/group c 64 0x??????
vgcreate /dev/newvg /dev/dsk/c6t6d0
this will create your new vg

For LV's
lvcreate -L size (in MB) -n lvname /dev/newvg
this will create your new lv
than create new mount piont

newfs -F vxfs -o largefiles /dev/newvg/rlvname ( use r )
than mount new FS

and add entry in your /etc/fstab file


Regards
Sanjeev

[Aristotle]

Sir sanjee thanks so much greatly appreciated.I will use command.later on SAM.

anyway could explain further. Please line by line.

ll /dev/*/group ( Use new Number which is not listed)
--what do you mean use new number?

mknod /dev/newvg/group c 64 0x??????
lvcreate -L size (in MB) -n lvname /dev/newvg
--0x??????--how can i fill up that one?

newfs -F vxfs -o largefiles /dev/newvg/rlvname ( use r )

--use r? why and how?

[Aristotle]

# ll /dev/*/group
crw-r----- 1 root sys 64 0x000000 Oct 22 2002 /dev/vg00/group
crw-r--r-- 1 root sys 64 0x150000 Jul 13 2005 /dev/vg15/group
crw-rw-rw- 1 root sys 64 0x0a0000 Oct 3 2007 /dev/vgdev/group
#

[Torsten. · Accepted solution]

You can use

mknod /dev/newvg/group c 64 0x010000

because it is not in use yet.