[SOLVED] vgdisplay -v -D results in invalid option -D in rhel 5.5(tikanga)

hartajdugal · 07-15-2010, 06:05 AM

Hi,
Any idea when the -D option was withdrawn ? I could not find much information on this . Also, what exactly is the difference between vgdisplay -v -D and just vgdisplay -v .
Thanks,
Hartaj Singh .

alli_yas · 07-15-2010, 06:17 AM

Hi Hartaj,

Not sure exactly when it was withdrawn. But testing with/without the -D on an old RHEL 4 machine of mine; there seems to be no difference:

Code:

# vgdisplay VolGroup00
  --- Volume group ---
  VG Name               VolGroup00
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  10
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                5
  Open LV               5
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               279.25 GB
  PE Size               32.00 MB
  Total PE              8936
  Alloc PE / Size       8936 / 279.25 GB
  Free  PE / Size       0 / 0   
  VG UUID               bATTIh-TNs0-2H66-zQWb-16ow-SD4H-RuJmDW
   
# vgdisplay -D VolGroup00
  --- Volume group ---
  VG Name               VolGroup00
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  10
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                5
  Open LV               5
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               279.25 GB
  PE Size               32.00 MB
  Total PE              8936
  Alloc PE / Size       8936 / 279.25 GB
  Free  PE / Size       0 / 0   
  VG UUID               bATTIh-TNs0-2H66-zQWb-16ow-SD4H-RuJmDW

trickykid · 07-15-2010, 10:40 AM

When in doubt, refer to the man pages. The only D option is -d for debug in RHEL 5.5.

hartajdugal · 07-16-2010, 12:02 AM

Thanks guys..
I did check the man page . In fact there is some difference between the -D and -d options . I found this somewhere :

-d, --debug
Enables additional debugging output (if compiled with DEBUG).

-D, --disk
Show attributes from the volume group descriptor area on disk(s). Without this switch they are shown from the kernel. Useful if the volume group isn't activated.

Hence my confusion . Any idea about this ?

vikas027 · 07-16-2010, 12:11 AM

Quote:

Originally Posted by hartajdugal

Thanks guys..
I did check the man page . In fact there is some difference between the -D and -d options . I found this somewhere :

-d, --debug
Enables additional debugging output (if compiled with DEBUG).

-D, --disk
Show attributes from the volume group descriptor area on disk(s). Without this switch they are shown from the kernel. Useful if the volume group isn't activated.

Hence my confusion . Any idea about this ?

There is no -D option in RHEL/CentOS. I think -D option would be in some other flavor of Linux or Unix.
Certainly NOT in RHEL/CentOS/Fedora.

The only options available are:-

Code:

       vgdisplay    [-A|--activevolumegroups]    [-c|--colon]    [-d|--debug]
       [-h|--help]   [--ignorelockingfailure]   [-P|--partial]   [-s|--short]
       [-v[v]|--verbose [--verbose]] [--version] [VolumeGroupName...]

alli_yas · 07-16-2010, 08:34 AM

Quote:

There is no -D option in RHEL/CentOS. I think -D option would be in some other flavor of Linux or Unix.
Certainly NOT in RHEL/CentOS/Fedora.

Yes and No - definitely RHEL/CentOS 5 don't have a -D option. However it seems RHEL 4 did have the -D option - I have tested on an old RHEL 4 machine of mine.

trickykid · 07-16-2010, 10:57 AM

Quote:

Originally Posted by hartajdugal

Thanks guys..
I did check the man page . In fact there is some difference between the -D and -d options . I found this somewhere :

-d, --debug
Enables additional debugging output (if compiled with DEBUG).

-D, --disk
Show attributes from the volume group descriptor area on disk(s). Without this switch they are shown from the kernel. Useful if the volume group isn't activated.

Hence my confusion . Any idea about this ?

Which man page you looking at? The default man page on the RHEL 5.5 machine I looked at lacked the -D option in it.