Copying a Filesystem

[Joe Redman]

I have a 24GB filesystem that I need to copy to another device. I have used cpio, tar, and dd in the past to copy a filesystem from one device to another. Extent size is 1024. Runnin HP-UX 11.0 on a 8-way N-class with 10GB memory. I was wondering if anybody can tell me the quickest way to accomplish this copy. I am testing with dd but, am wondering if I am setting all the correct switches to minimize time.

Any assistance would be appreciated.

Peace!
Joe

[Victor BERRIDGE]

Faster would be making a mirror copy of that lvm, only mirro-ux is a not free option...
and only works if I remember right within a same volume group...
then dd, then cpio...

All the best

Victor

[harry d brown jr]

cp -rp

The problem with dd is that you could be copying bad track info.

live free or die
harry

[Duncan Edmonstone]

Well I wouldn't expect dd to be the quickest as it will merrily copy all the empty space on you file system as well. tar & cpio should do the job fine - you might also want to look at volcopy

HTH

Duncan

[Darrell Allen · Accepted solution]

Hi Joe,

$ cd /source_dir
$ find . | cpio -pudlm /destination_dir

I formerly used tar until a post by Bill Hassell taught me that cpio is much faster.

Darrell

[G. Vrijhoeven]

Hi,

i should use fbackup / frecover.

Hope this will help,

Gideon

[James R. Ferguson]

Hi Joe:

I always use 'cpio' and the options to preserve file permissions and modification timestamps:

# cd myolddir
# find . -depth -print|cpio -pudlmv mynewdir

Regards!

...JRF...

[Jeff Machols]

If you are using dd, make sure you use the raw device for the disks (/dev/rdsk/c1t1d0). you can also change the blocksize with the -bs option, the default is 512, you can go way higher than that

[Sanjay_6]

Hi Joe,

Try this link,

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=3fe9ee9f1b945641b0/screen=ckiDisplayDocument?docId=200000006367082

Hope this helps.

Regds

[Roger Baptiste]

hi joe,

I use the find & Cpio combination for Copy.
Works as you want it and is fast too.

#cd olddir
find . -depth -print|cpio -pdlmv $newdir

-> You can remember this command by a simple trick. The words pdlmv -> paddlemove!

HTH
raj

[Darrell Allen]

Hi again Joe,

Notice I omitted the "v" option for cpio. It will run faster without verbose output, especially if displaying on a terminal (like a 9600 baud console).

Darrell

[fg_1]

Joe

Your configuration should not present a problem as far as speed of this copy. Follow the steps below to safely accomplish your task:

1) Ensure that the device you are copying to has the same characteristics as the drive you are copying from.

2) Create the area you are copying to with the same parameters that you used on the original.

3) cd /source_dir

4) find . | cpio -pudlm /destination_dir (the raw partition if it's a raw device)

Good luck.

[Helen French]

hey,

I would suggest u to do this:

# cd source_dir
# find . -depth -print | cpio -pdlmuva dest_dir

HTH,
Shiju