Re: Transferral between two hard disks
Brunoc_at_quipo.it
Date: 03/25/04
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To: "Jerry McAllister" <jerrymc@clunix.cl.msu.edu>, <judmarc@fastmail.fm> Date: Thu, 25 Mar 2004 00:18:11 +0100
----- Original Message -----
>
> Hi community,
>
> I would like to transfer the contents of an hard disk
> partition,in which is installed FreeBSD (in another partition
> is installed NetBSD and another one is unused),to another hard disk.
> The recipient hard disk will have only FreeBSD,and is capable to get
> all the data from the original.
> I guess I would perform such operation in a way like
> disk image software for Windows (System Commander,
> Norton Ghost) does.I've seen on previous postings the use
> of command like 'dd' or 'ioctl',but I don't know if they
> are appropriate or not.
> In a few words,my goal is to have a bootable hard disk
> with my FreeBSD and data,like the original one,original one that
> I'm going to use for other purposes.
>
> FreeBSD seekingjob.singles.it 4.9-RC FreeBSD 4.9-RC #0: Wed Oct 15 00:12:26 CEST 2003 root@:/usr/obj/usr/src/sys/CURRENT_WITH_WINE_OPTIONS i386
> -------------------------------------------------------------
> For complete information,even in the case you don't need it,
> I include the disklabel command output of my original
> FreeBSD disk:
>
> 8 partitions:
> # size offset fstype [fsize bsize bps/cpg]
> a: 163840 0 4.2BSD 1024 8192 16 # (Cyl. 0 - 10*)
> b: 532480 163840 swap # (Cyl. 10*- 46*)
> c: 61432497 0 unused 0 0 # (Cyl. 0 - 4062*)
> e: 60736177 696320 4.2BSD 1024 8192 16 # (Cyl. 46*- 4062*)
>
> /dev/ad2s1e:
> type: ESDI
> disk: ad2s1
> label:
> flags:
> bytes/sector: 512
> sectors/track: 63
> tracks/cylinder: 240
> sectors/cylinder: 15120
> cylinders: 4062
> sectors/unit: 61432497
> rpm: 3600
> interleave: 1
> trackskew: 0
> cylinderskew: 0
> headswitch: 0 # milliseconds
> track-to-track seek: 0 # milliseconds
> drivedata: 0
> -------------------------------------------
> Thank you
> Bruno
>
> Does the NetBSD also need to be bootable?
> You really need to include the fdisk information too so we can see
> what the slices actually are - note you have a FreeBSD 'slice'
> not partition, in the FreeBSD world, and within that FreeBSD slice you
> have three partitions - a, b and e. You say you also have a NetBSD slice
> and an unused slice, but don't show anything. The fdisk output would
> at least show that. do:
> fdisk -v da0 > fdisk.out or fdisk -v ad0 > fdisk.out
> Then include the contents of fdisk.out in the message.
> Unless the new disk is identical in every way to the old one, you don't
> want to bother with dd or any of the other so-called imaging utilities.
> Even if they are identical, they represent the less reliable way.
>
> In general, I would recommend doing a fdisk on the new disk to make the
> slices and then disklabel the FreeBSD slice and newfs the newly created
> partitions. When you do the fdisk, make the FreeBSD slice bootable and
> put an MBR on it and in disklabel put a standard boot block in the slice.
>
> Then use dump(8) and restore(8) to copy the contents of each separate
> filesystem in the FreeBSD slice to the new filesystems on the new disk.
> You do not need to use tape for the dump. Just mount the new file system,
> to some alternate mount point such as /newroot. cd in to it and then
> pipe a dump of the old file system to a full restore in the new one.
> There used to be an example of this in the dump and restore man pages
> but I don't see it now. Maybe it was in man pages on another OS.
> You only need to do this for the root (a) and other big file system (e) (is
> it mounted as /usr?) Don't try to copy the swap partition.
> This is the most reliable way.
>
> Presuming that your e partition mounts as /usr
> and you did the fdisk, disklabel and newfs of the new disk OK.
> Also, presuming it is SCSI disk.
> If it is IDE, then da1s1a becomes ad1s1a, etc.
>
> recommend doing this in single user mode
> So, after rebooting in to single user.
>
> mount -a
>
> mkdir /newroot
> mount /dev/da1s1a /newroot
> cd /newroot
> dump 0af - / | restore -rf -
> mkdir /newusr
> mount /dev/da1s1e /newusr
> cd /newusr
> dump 0af - /usr | restore -rf -
>
> Since you don't show anything about the NetBSD slice, it is hard to know
> what to do with it. You might actually be able to use the dump/restore
> for it too if you can mount it in a running FreeBSD. Of course, there
> is no point in trying to copy the unused slice.
>
> ////jerry
>
>> <URL:
>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/disks.html#NEW-HUGE-DISK>
>>
>> HTH,
>>
>> Jud
Thank you very much for your valuable information.
The NetBSD slice does not need to be bootable,
I was playing with it and I have no significant data,
so I will eventually reinstall NetBSD or OpenBSD
from scratch on the first hard drive (the recipient).
Yes,my e partition mounts as /usr.
I'm going to include the fdisk information as soon
as I can boot again on my second hard disk (is an IDE one),
from which the FreeBSD slice is to be tranferred to the first
drive (another IDE).
Bruno
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