[linux-lvm] Logical Volume file system

[linux-lvm] Logical Volume file system

[Julien Baboud]

hi,

 is there a way to know the type of the file system installed on a
Logical Volume ?
 This information isn't displayed in the output of the 'lvdisplay'
command :(

 tanx.

 julien,
 4 Atix.

Re: [linux-lvm] Logical Volume file system

[Wichert Akkerman]

Previously Julien Baboud wrote:
>  This information isn't displayed in the output of the 'lvdisplay'
> command :(

The LV itself really doesn't care what you put on it, it does not even
need to be a filesystem.

Wichert.

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Re: [linux-lvm] Logical Volume file system

[José Luis Domingo López]

On Wednesday, 25 July 2001, at 16:26:35 +0200,
Wichert Akkerman wrote:

> Previously Julien Baboud wrote:
> >  This information isn't displayed in the output of the 'lvdisplay'
> > command :(
> 
> The LV itself really doesn't care what you put on it, it does not even
> need to be a filesystem.
> 
Does it mean that applications can use a LV as a "raw device" ?.

I've been searching through many places about Linux kernel 2.4.x support
for raw devices, and found nothing specific.

Is raw devices support 2.5.x material, or is it possible with 2.4.x ?

--
Jos� Luis Domingo L�pez
Linux Registered User #189436     Debian GNU/Linux Potato (P166 64 MB RAM)
 
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Re: [linux-lvm] Logical Volume file system

[Wichert Akkerman]

Previously Jos� Luis Domingo L�pez wrote:
> Does it mean that applications can use a LV as a "raw device" ?.

There is no such as a `raw device'. A LV can be seen as a normal blockdevice
from userland, just like a normal harddisk or disk slice.

I think what you are referring to is `raw io', which is something you
can do with any block device. Currently you still need a special rawio
patch for Linux kernels, but it's a well tested and stable patch.

Wichert.

-- 
  _________________________________________________________________
 /       Nothing is fool-proof to a sufficiently talented fool     \
| wichert@wiggy.net                   http://www.liacs.nl/~wichert/ |
| 1024D/2FA3BC2D 576E 100B 518D 2F16 36B0  2805 3CB8 9250 2FA3 BC2D |

Re: [linux-lvm] Logical Volume file system

[Heinz J . Mauelshagen]

On Wed, Jul 25, 2001 at 04:55:27PM +0200, Wichert Akkerman wrote:
> Previously Jos� Luis Domingo L�pez wrote:
> > Does it mean that applications can use a LV as a "raw device" ?.
> 
> There is no such as a `raw device'. A LV can be seen as a normal blockdevice
> from userland, just like a normal harddisk or disk slice.
> 
> I think what you are referring to is `raw io', which is something you
> can do with any block device. Currently you still need a special rawio
> patch for Linux kernels, but it's a well tested and stable patch.

Wichert is right,

you need a patch for 2.2.

rawio is included in 2.4.

> 
> Wichert.
> 
> -- 
>   _________________________________________________________________
>  /       Nothing is fool-proof to a sufficiently talented fool     \
> | wichert@wiggy.net                   http://www.liacs.nl/~wichert/ |
> | 1024D/2FA3BC2D 576E 100B 518D 2F16 36B0  2805 3CB8 9250 2FA3 BC2D |
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Regards,
Heinz    -- The LVM Guy --

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    Nevertheless it needs not so stupid people to solve them ***

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