On 4 May 2007 12:26:53 -0700, painulyarun@gmail.com said something similar to:
>
> Physical Volumes entries exists in: /dev/dsk n /dev/rdsk with slice
> information. Anyway we can get the Physical volumes/disk info

Sort of. Knowing that there's a physical disk device named
/dev/dsk/ct2t1d0 doesn't tell you whether the device is a single
hard disk or a LUN on hardware RAID array for instance. The OS
just sees it as a disk either way.

> And for logical Volumes: /etc/mnttab, /etc/vfstab contains entries

No. /etc/mnttab and /etc/vfstab contain entries regarding filesystems,
not volumes. For local filesystems, the entries map the filesystem
back to the volume (physical or logical) on which it resides.

It's quite possible to have volumes present on the system and in use
which aren't recorded in /etc/mnttab or /etc/vfstab because they don't
contain filesystems. (e.g. A database using raw devices for data storage.)

> And its not generic to get all the Logical Volumes from these
> location. Suppose Volume Managers are (+1) installed then Scene is
> different as Volume Managers are having their own approch make entries
> under OS ... like Veritas Volume Manager (VxVm) is creating logical
> volume entries in /dev/vx/....
>
> So my question is "Is there any independent way to get all Logical
> Volumes without taking care of Volume Managers?"

Without a logical volume manager, you can't have logical volumes.
If you want to know what logical volumes are present on a given system,
you need to know what LVMs are in use and how to query them for
infomation regarding the volumes they manage.

On May 5, 4:25 am, Mike Delaney wrote:
> On 4 May 2007 12:26:53 -0700, painulya...@gmail.com said something similar to:
>
>
>
> > Physical Volumes entries exists in: /dev/dsk n /dev/rdsk with slice
> > information. Anyway we can get the Physical volumes/disk info
>
> Sort of. Knowing that there's a physical disk device named
> /dev/dsk/ct2t1d0 doesn't tell you whether the device is a single
> hard disk or a LUN on hardware RAID array for instance. The OS
> just sees it as a disk either way.
>
> > And for logical Volumes: /etc/mnttab, /etc/vfstab contains entries
>
> No. /etc/mnttab and /etc/vfstab contain entries regarding filesystems,
> not volumes. For local filesystems, the entries map the filesystem
> back to the volume (physical or logical) on which it resides.
>
> It's quite possible to have volumes present on the system and in use
> which aren't recorded in /etc/mnttab or /etc/vfstab because they don't
> contain filesystems. (e.g. A database using raw devices for data storage.)
>
> > And its not generic to get all the Logical Volumes from these
> > location. Suppose Volume Managers are (+1) installed then Scene is
> > different as Volume Managers are having their own approch make entries
> > under OS ... like Veritas Volume Manager (VxVm) is creating logical
> > volume entries in /dev/vx/....
>
> > So my question is "Is there any independent way to get all Logical
> > Volumes without taking care of Volume Managers?"
>
> Without a logical volume manager, you can't have logical volumes.
> If you want to know what logical volumes are present on a given system,
> you need to know what LVMs are in use and how to query them for
> infomation regarding the volumes they manage.

Thanks a lot 4 ur quick response!

So we need to take care of every installed Volume Manager

Do you have any pointer to docs where i can get all the details about
Volume managers .. how they are dealing with Logical
Volumes.... ........ hmm.. Big task

Thanks!

On 5 May 2007 03:13:29 -0700, painulyarun@gmail.com said something similar to:
>
> Do you have any pointer to docs where i can get all the details about
> Volume managers .. how they are dealing with Logical
> Volumes.... ........ hmm.. Big task
>

On Solaris the two you're most likely to run into are Solaris Volume
Manager (SVM) (known in older releases as Disk Suite or Solstice Disk Suite),
and Veritas Volume Manager (VxVM).

Documetation for SVM and its prior incarnations can be found on docs.sun.com,
and documentation for VxVM is avalible from the support section of
Symantec's website.

In article ,
Mike Delaney wrote:
>On 5 May 2007 03:13:29 -0700, painulyarun@gmail.com said something similar to:
>>
>> Do you have any pointer to docs where i can get all the details about
>> Volume managers .. how they are dealing with Logical
>> Volumes.... ........ hmm.. Big task
>>
>
>On Solaris the two you're most likely to run into are Solaris Volume
>Manager (SVM) (known in older releases as Disk Suite or Solstice Disk Suite),
>and Veritas Volume Manager (VxVM).

Although, with Solaris 10, you'll also have ZFS available (not just a
filesystem but a storage management system, as well).

-tom
--

"You can only be -so- accurate with a claw-hammer." --me

On May 6, 12:31 pm, fer...@xanthia.com (Thomas H Jones II) wrote:
> In article ,
> Mike Delaney wrote:
>
> >On 5 May 2007 03:13:29 -0700, painulya...@gmail.com said something similar to:
>
> >> Do you have any pointer to docs where i can get all the details about
> >> Volume managers .. how they are dealing with Logical
> >> Volumes.... ........ hmm.. Big task
>
> >On Solaris the two you're most likely to run into are Solaris Volume
> >Manager (SVM) (known in older releases as Disk Suite or Solstice Disk Suite),
> >and Veritas Volume Manager (VxVM).
>
> Although, with Solaris 10, you'll also have ZFS available (not just a
> filesystem but a storage management system, as well).
>
> -tom
> --
>
> "You can only be -so- accurate with a claw-hammer." --me

Thanks a lot for ur responses!