Finding physical harddisk information

[maxell_1]

How do we find out how many physical hard disk/s are in a physical volume?

'pvdisplay' only shows the volume groups information.

Thanks

[john123]

If u really want to see the underlying physical hard disks of a PV presented from a RAID arry or a storage u have to use the RAID array specific or storage specific utilities and/or commands depending on from where u presented the PV.


So from where this PV is presented from ..?

regards
John

[saravanan08]

hi maxell

can u please clarify your question

i think u need number of physical volume in a volume group
for that u have to use

vgdisplay -v /dev/vg00(your vgname)

or
strings /etc/lvmtab

there is no difference between physical disk and physical volume.

physical disk if it comes to LVM and having lvm structures means its called as physical volume
thank you

[Analyst]

Hi Maxwell,

#vgdisplay -v < volume group>,

you get no of PV used, including the PV details at end.

Yes with the Strings /etc/lvmtab , also we can get the no of disk associated with the particular volume group.

Thanks,
Analyst.

[unixguy_1]

Hi Saravanan,

You are wrong,

one or more physical disk consist a single physical volume.

Actually maxell asking is how many HDD is in a Singal volume,how to find out.

Am i right Maxell?

Regards,
Unixguy.

[maxell_1]

OK let me clarify.

To my understanding, a physical volume can contain multiple SAS disks.

Therefore, how can I know the number of SAS disks configured as 1 of the physical volume
say in /dev/disk/disk4?

Thanks

[saravanan08]

sorry unixguy

i m new to this HPux

and moreover this is my first post in ITRC

k i l correct this in future and ur sugesstion wil be very much useful for me
i welcome this from ur side thank u

thanks

[john123]

Maxell

Use sasmgr
Don know the syntax.. Probably man page will help u

Regards
John

[Niceguy_2]

Hi,

We can use the command vgdisplay -v /dev/vgxx
and we can use strings /etc/lvmtab

Regards,
Niceguy

[unixguy_1]

Hi Niceguy,

Welcome to Forums,

Niceguy is correct,

Sorry Saravanan,Your Answer is correct.

Hi Maxell follow the niceguy solution you will get the Answer.

Regards,
Unixguy.

[maxell_1]

Hi All,

Below is the output of my 'vgdisplay' command. At the bottom of the output it specify that the physical volume is /dev/disk/disk7.

But supposedly I was told that this physical volume has is pooled from 6 SAS disks and I can't find that piece of info saying that this physical volume contains 6 SAS disks.

Please enlighten me. Thanks

***************************************
# vgdisplay -v /dev/vg01
--- Volume groups ---
VG Name /dev/vg01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 8
Open LV 8
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 52493
VGDA 2
PE Size (Mbytes) 8
Total PE 52492
Alloc PE 35000
Free PE 17492
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 1.0
VG Max Size 6719104m
VG Max Extents 839888

--- Logical volumes ---
LV Name /dev/vg01/lvsvr10g1_root
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g2_root
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g3_root
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g4_root
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g1_spare
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g2_spare
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g3_spare
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1

LV Name /dev/vg01/lvsvr10g4_spare
LV Status available/syncd
LV Size (Mbytes) 35000
Current LE 4375
Allocated PE 4375
Used PV 1


--- Physical volumes ---
PV Name /dev/disk/disk7
PV Status available
Total PE 52492
Free PE 17492
Autoswitch On
Proactive Polling On

[john123]

What is the server model u r using..? And which SAS controller it has..?

I think sasmgr command will give youwhat you require..

[Jozef_Novak · Accepted solution]

Hello,

try:

# ioscan -fnk | grep ciss

this will give you the device file of the respective SA controller.

Then run:

# saconfig , for example:

# saconfig /dev/ciss5

Jozef

[maxell_1]

Hi Jozef,

Yah thats the command that Im looking for and it shows me the SAS disks configured in a volume group.

John,

Tried the sasmgr but to no avail.

Everyone, thanks for the speedy response.