[Gllug] repeat soft noise from hard drive

[Jose Luis Martinez]

2008/12/11 James Hawtin <oolon at ankh.org>:
> When using dd you only need your replacement hard disk to be larger than the
> current one, drives are so large thesese days they use LBA addressing and
> that has nothing to do with the number of physical platters in the drives.

What about the partition table? dd would not play nice with that by
default I think.

>
> One thing to also get is the size of your hard drive (physically) I notice
> in your description you say 2.5, that might mean a 2.5 inch drive, most
> normal drives are 3.5.
>
> Personally I aways build a new set of files systems on the new drive and tar
> things across that way I am not copying any directory corruption, and have a
> statically linked version of tar for bootstrapping onto a new drive as i do
> the copy chrooted, and generally do it one filesystem at a time.

That is a good solution, if you have identical drives alternatively
you do an fsck after the dd for each filesystem, that ensures there is
no corruption in the newly created disk.

>
> One useful trick when copying from old hard drives is to mount the old drive
> read old! As its normally best to use tar preserving absolute paths, to
> make sure links come out correctly.
>
> cd /old ; tar -cPpSslf - . | chroot /new star -xvPpSslf -
>
> if you want to do it using relative paths.
>
> cd /old ; tar -cpSslf - . | ( cd /new ; tar -xvpSslf - )
>
> Remove the l if you want to the whole heirachy in one go.
>
> If your drive is corrupted, I suggest you get drive better than the current
> one create big file system on it then use dd_rescue to copy the partitions
> off the drive, if you log the failed sectors you can write a script to
> retry. Once you have the data on a good drive, you can use fsck etc on the
> files and mount them loop back, doing an fsck on a bad drive and make things
> alot worse.
>
> Having said all of that your drive might not be booting because grub/lilo
> was not correctly installed on the drive.

I lost you somewhere  there :-)

>
> James
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