Need to migrate data from old HDD

Jakeh2k1 · 08-26-2005, 03:07 AM

Hi all,

I had a file system error on an old hdd, i now have a new hdd in my server, however i want to migrate the data from my old hdd which is attatched, and i'm completely lost as what to do

The old drive is on the system as /dev/hdc

Can anyone give me a run through on what to do please?

TIA

Jake

Nathanael · 08-26-2005, 04:04 AM

you mount a partition at a mountpoint, access the hdd via the mountpoint and copy data out ont the new hdd...
for this you will only need max 4 commands (i assume)

sfdisk -l #that is a lowercase L
use this to find out which partition of hdc you need to mount

mount
use this to mount the old hdd at a mountpoint

cd
use this to access the mountpoint (the directory under which your old hdd is now accessable)

and finaly
cp
stands for copy :-)

if you need help for either of these commands use man:
man <commandname> ie: man mount

Jakeh2k1 · 08-26-2005, 09:08 AM

Hi Nathanael,

Thanks for the reply.

I've mounted it: "mount" returns this for the hdd:

/dev/hdc on /tmp/foo type ext2 (rw)

However, i can't cd to it, it says it's not a directory

Jack

Nathanael · 08-26-2005, 09:45 AM

that is because /dev/hdc is your entire drive... but you need to mount a partition, that is why i mentioned "sfdisk -l" because this will give you a more precise overview of what partition you are looking for, example:

Code:

fdisk -l output:


Disk /dev/hda: 19485 cylinders, 16 heads, 63 sectors/track
Units = cylinders of 516096 bytes, blocks of 1024 bytes, counting from 0

   Device Boot Start     End   #cyls    #blocks   Id  System
/dev/hda1   *      0+     61      62-     31216+  83  Linux
/dev/hda2         62    1053     992     499968   82  Linux swap / Solaris
/dev/hda3       1054   19484   18431    9289224   83  Linux
/dev/hda4          0       -       0          0    0  Empty

so here you can see that we will not want to mount /dev/hda2 since this is the swap space, hda1 looks ok, but it is too small, and i know that this is my /boot partition so in this case i would want to have a look at hda3. this means i do following:
mount /dev/hda3 /mnt/foo

Nathanael · 08-26-2005, 09:49 AM

mount to /mnt this directory is exactly for that purpose
mnt for mount

/tmp is only for temporary stuff...
tmp (short for temp) for temporary

:-)

Jakeh2k1 · 08-26-2005, 09:50 AM

Hi,

Ok i've done that, now i've got /mnt/foo with just lost+found hehe.

Mounted ok, but sfdisk -l doesn't return a /dev/hdc option

fdisk -l returns it, but says

Disk /dev/hdc: 80.0 GB, 80026361856 bytes
16 heads, 63 sectors/track, 155061 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

Disk /dev/hdc doesn't contain a valid partition table

Jake

Nathanael · 08-26-2005, 10:09 AM

what does fdisk -l give you?

or try using part /dev/hdc
hit p for the part. table
and hit q to exit

Jakeh2k1 · 08-26-2005, 08:22 PM

fdisk -l returns:

Code:

[root@*]# fdisk -l

Disk /dev/hda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1          13      104391   83  Linux
/dev/hda2              14         144     1052257+  82  Linux swap
/dev/hda3             145        9729    76991512+  83  Linux

Disk /dev/hdc: 80.0 GB, 80026361856 bytes
16 heads, 63 sectors/track, 155061 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes

Disk /dev/hdc doesn't contain a valid partition table

Part doesn't do anything

Jake

Nathanael · 08-27-2005, 04:22 AM

Quote:

Disk /dev/hdc doesn't contain a valid partition table

you might be better off trying this the other way round... try booting up from you old hdd, if that should work you can mount the new hdd (you will want to mount /dev/hda3)

but unless you have a backup of you parition table, i currently assume you dont, you will not be able to retrieve any data at all! (that is waht i think)

another bet woult be to google for 'doesn't contain a valid partition table'

sorry about that.

Jakeh2k1 · 08-28-2005, 03:23 PM

the old hdd isn't bootable unfortuantely.

Ah well, nevermind

THanks for your help though! much appreciated

Jack