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Old 13th October 2008
peterg22 peterg22 is offline
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Default Installation master "disk" using USB memory stick, dd?

Carpetsmoker - thanks for a truly useful site!

I've just completed a new server install of FreebSD 7.0-RELEASE and want to make a master backup for possible installation on a series of other boxes. What I'd like to do ideally is to use dd to copy my base install to a USB memory stick, then just dd it up to the new machine's hard drive. Like..

Code:
dd if=/dev/da0 of=/dev/da1 bs=1024
Would this work?

Thanks in advance..
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Old 13th October 2008
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vermaden vermaden is offline
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Yes, this would work mate.

To make it faster use bs=8MB
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Old 13th October 2008
peterg22 peterg22 is offline
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Thanks! This is going to make life so much simpler
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Old 14th October 2008
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you can dd it to output and compress it on the fly....
, however i prefer using dump and restore, they should be more way faster than dd, since they won't save unused space on hard drive....
also backup file will be smaller (and also can be compressed on the fly)
+ backup can be made for running filesystem, the only thing is it works only on UFS

to backup and compress
Code:
$ dump -0Lauf - /dev/ad4s1d | bzip2 -9 > /path/to/ad4s1d.bak.bz2
to uncompress and restore restore
note for this you will need some /tmp space, if tmp is to small it will fail, so you might need to link /tmp to bigger filesystem
Code:
$ newfs -U /dev/ad4s1d
$ mount /dev/ad4s1d /mnt
$ cd /mnt
$ bzcat /path/to/ad4s1d.bak.bz2 | restore -xf -
I think, tha sould do the trick....


read
man dump
man restore


also you can use this method to resize partitions
or clone FreeBSD among other PC's (you will need to copy MBR to all of them with dd)

Last edited by graudeejs; 14th October 2008 at 06:40 AM.
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Old 14th October 2008
peterg22 peterg22 is offline
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Thanks! I set off my "dd" to the memory stick last night and it ran for hours - wish I'd read your reply before I started
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Old 14th October 2008
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also if you dd data from disk that is smaller to disk that is greater, you will not be able to use unused space

for example
spource disk is 8GB
target disk is 160BG

if you dd then you will overwrite filesystem/partition table etc... and therefore won't be able to use rest of free space....
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Old 14th October 2008
BSDfan666 BSDfan666 is offline
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Not entirely true killasmurf86, but somewhat... directly using dd for such things isn't what I'd recommend, dump+restore and preparing the new disk is somewhat better.

A direct "dd" to a new disk will work in some situations... but he'll need to increase the size of the MBR partition and the disklabel.. then carefully use growfs.

Often there are many solutions to the same problem on Unix..
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Old 14th October 2008
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Quote:
Originally Posted by BSDfan666 View Post
Not entirely true killasmurf86, but somewhat... directly using dd for such things isn't what I'd recommend, dump+restore and preparing the new disk is somewhat better.

A direct "dd" to a new disk will work in some situations... but he'll need to increase the size of the MBR partition and the disklabel.. then carefully use growfs.

Often there are many solutions to the same problem on Unix..
I know, that, i was just lazy to write....
anyway, in most cases, simple user will mess up with dd
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