how to identify filesystem type

Hi,

I need your help, in understanding filesystems. Kindly let me know how to
identify the filesystem in an image file or block device.

thanks in advance and regards,

Pankaj Agarwal

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Re: how to identify filesystem type

--- Pankaj Agarwal wrote:

> Kindly let me know how to
> identify the filesystem in an image file or block
> device.
>

Hi Pankaj,

if you've got an image file called somefs.img you
should be able to do:

file somefs.img

If you've got a block device - say /dev/hda1 - then
you'll need to do the following (probably as root).
Be careful to type this command correctly or you
could be in a world of pain

dd if=/dev/hda1 bs=1k count=5 | file -

A
DO NOT USE dd WITH ANYTHING UNDER /dev WHILE RUNNING
AS ROOT UNLESS YOU REALLY, REALLY HAVE TO.



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Re: how to identify filesystem type

Sorry for the typo, the command to check a block
device such as /dev/hda1 is:

dd if=/dev/hda1 bs=1k count=5 | file -

Regards,

ippi



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Re: how to identify filesystem type

hi,

it doesn't provide the information seeked....i am enclosing the output
below...
# file /mnt/hda5/hdstg2.img

/mnt/hda5/hdstg2.img: data

# dd if=/dev/hdc1 bs=1k count=5 | file -

standard input: data

5+0 records in

4+0 records out

# file -s /dev/hdc{,1,2,3,4,5,6,7,8,9,10}

/dev/hdc: x86 boot sector

/dev/hdc1: data

/dev/hdc2: x86 boot sector, extended partition table

/dev/hdc3: empty

/dev/hdc4: empty

/dev/hdc5: data

/dev/hdc6: data

/dev/hdc7: data

/dev/hdc8: Linux/i386 swap file version 1 (4K pages) size 63999 pages

/dev/hdc9: data

/dev/hdc10: empty

kindly suggest more about it...

thanks, Pankaj



----- Original Message -----
From: "ippi"
To: "Pankaj Agarwal" ;
Sent: Thursday, August 19, 2004 1:43 PM
Subject: Re: how to identify filesystem type


>
> --- Pankaj Agarwal wrote:
>
> > Kindly let me know how to
> > identify the filesystem in an image file or block
> > device.
> >
>
> Hi Pankaj,
>
> if you've got an image file called somefs.img you
> should be able to do:
>
> file somefs.img
>
> If you've got a block device - say /dev/hda1 - then
> you'll need to do the following (probably as root).
> Be careful to type this command correctly or you
> could be in a world of pain
>
> dd if=/dev/hda1 bs=1k count=5 | file -
>
> A
> DO NOT USE dd WITH ANYTHING UNDER /dev WHILE RUNNING
> AS ROOT UNLESS YOU REALLY, REALLY HAVE TO.
>
>
>
> __________________________________
> Do you Yahoo!?
> Yahoo! Mail Address AutoComplete - You start. We finish.
> http://promotions.yahoo.com/new_mail
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> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs
>
>

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Re: how to identify filesystem type

I see what you mean. I created a reiserfs filesystem
and file only recognised it as data. If the block
devices are all hard disk partitions you should
try fdisk:

fdisk -l

Also, if you're interested in the filesystems of
block devices that are already mounted, then just
type:

mount

I don't know what is on the image /mnt/hda5/hdstg2.img
but you could try to mount it and see if it's
recognised. Just do the following:

mkdir mp
mount -v -o loop /mnt/hda5/hdstg2.img mp

I take it you are sure that there are filesystems on
these devices and that they are not corrupted!


--- Pankaj Agarwal wrote:
> hi,
>
> it doesn't provide the information seeked....i am
> enclosing the output
> below...
> # file /mnt/hda5/hdstg2.img
>
> /mnt/hda5/hdstg2.img: data
>
> # dd if=/dev/hdc1 bs=1k count=5 | file -
>
> standard input: data
>
> 5+0 records in
>
> 4+0 records out
>
> # file -s /dev/hdc{,1,2,3,4,5,6,7,8,9,10}
>
> /dev/hdc: x86 boot sector
>
> /dev/hdc1: data
>
> /dev/hdc2: x86 boot sector, extended partition table
>
> /dev/hdc3: empty
>
> /dev/hdc4: empty
>
> /dev/hdc5: data
>
> /dev/hdc6: data
>
> /dev/hdc7: data
>
> /dev/hdc8: Linux/i386 swap file version 1 (4K pages)
> size 63999 pages
>
> /dev/hdc9: data
>
> /dev/hdc10: empty
>
> kindly suggest more about it...
>




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