Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-08 Thread Hakan Koseoglu
Kevin, On Sun, Jun 7, 2009 at 11:05 PM, Kevin Krieserk_krie...@sbcglobal.net wrote: On Jun 7, 2009, at 2:59 PM, Les Mikesell wrote: In my case, I was hoping it would avoid the bad sector since the bad sectors were in free space.  So the hope was that it would skip it. Bad disks are a

[CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Niki Kovacs
Hi, I'm currently experimenting with G4U (Ghost for Unix), a small cloning application sending disk images to an FTP server. The application reads the whole disk bit by bit, compresses it and then stores it remotely. Due to this approach, it's more or less filesystem-independent. The drawback

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Rainer Duffner
Am 07.06.2009 um 18:22 schrieb Niki Kovacs: Hi, I'm currently experimenting with G4U (Ghost for Unix), a small cloning application sending disk images to an FTP server. The application reads the whole disk bit by bit, compresses it and then stores it remotely. Due to this approach,

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Niki Kovacs
Rainer Duffner a écrit : Ideally, the zero'ing of the disk should take place before the OS is installed, via a boot-cd and using dd with the disk-device itself Erm... how exactly would you go about that? Let's say I want to do that with a Knoppix boot CD, and the only hard disk I have on

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Mathew S. McCarrell
In my previous experience, zeroing the disk will result in smaller files for G4U but it will take awhile depending on many factors including the size of the disk, performance, etc.. Also, I recommend giving Clonezilla (http://clonezilla.org/) a try. It offers more options than G4U and is more

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Nicolas Thierry-Mieg
Rainer Duffner wrote: Am 07.06.2009 um 18:22 schrieb Niki Kovacs: Hi, I'm currently experimenting with G4U (Ghost for Unix), a small cloning application sending disk images to an FTP server. The application reads the whole disk bit by bit, compresses it and then stores it remotely.

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Kevin Krieser
On Jun 7, 2009, at 12:06 PM, Niki Kovacs wrote: Rainer Duffner a écrit : Ideally, the zero'ing of the disk should take place before the OS is installed, via a boot-cd and using dd with the disk-device itself Erm... how exactly would you go about that? Let's say I want to do that with a

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Niki Kovacs
Nicolas Thierry-Mieg a écrit : Niki, I suggest you look at partimage. G4U seems similar, but partimage doesn't write free blocks to the images, so you don't get these huge files. It's worked well for me. It's in rpmforge. Thanks for the suggestion. I just took a look at it. But I think

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Niki Kovacs
Kevin Krieser a écrit : I've done the zeroing out thing on mounted filesystems before when I wanted to move the contents of a drive to another. zeroing out before would be best if you planned to do an install, then back it up for later. Otherwise, you end up with a lot of unused

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Les Mikesell
Niki Kovacs wrote: Hi, I'm currently experimenting with G4U (Ghost for Unix), a small cloning application sending disk images to an FTP server. The application reads the whole disk bit by bit, compresses it and then stores it remotely. Due to this approach, it's more or less

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Rainer Duffner
Am 07.06.2009 um 19:27 schrieb Niki Kovacs: Kevin Krieser a écrit : I've done the zeroing out thing on mounted filesystems before when I wanted to move the contents of a drive to another. zeroing out before would be best if you planned to do an install, then back it up for later.

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Niki Kovacs
Rainer Duffner a écrit : Ever booted a live-CD? It also knows your disks (unless it's a server, except for maybe the CentOS LiveCD, most other's suck on servers - they simply don't recognize the controllers). The question was not about the LiveCD, but more about the use of dd. So,

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Rainer Duffner
Am 07.06.2009 um 19:54 schrieb Niki Kovacs: Rainer Duffner a écrit : Ever booted a live-CD? It also knows your disks (unless it's a server, except for maybe the CentOS LiveCD, most other's suck on servers - they simply don't recognize the controllers). The question was not about the

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Niki Kovacs
Rainer Duffner a écrit : Yup. If you have the time, you can experiment with the blocksize and see where the throughput is best. http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/2008-09/msg01375.html Interesting thread. Guess I'll give it a few spins with different blocksizes

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Kevin Krieser
On Jun 7, 2009, at 12:34 PM, Les Mikesell wrote: Niki Kovacs wrote: Hi, I'm currently experimenting with G4U (Ghost for Unix), a small cloning application sending disk images to an FTP server. The application reads the whole disk bit by bit, compresses it and then stores it

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Kevin Krieser
On Jun 7, 2009, at 12:54 PM, Niki Kovacs wrote: Rainer Duffner a écrit : Ever booted a live-CD? It also knows your disks (unless it's a server, except for maybe the CentOS LiveCD, most other's suck on servers - they simply don't recognize the controllers). The question was not about the

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Kevin Krieser
On Jun 7, 2009, at 1:11 PM, Niki Kovacs wrote: Rainer Duffner a écrit : Yup. If you have the time, you can experiment with the blocksize and see where the throughput is best. http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/2008-09/msg01375.html Interesting thread. Guess I'll

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread John R Pierce
Niki Kovacs wrote: Rainer Duffner a écrit : Yup. If you have the time, you can experiment with the blocksize and see where the throughput is best. http://unix.derkeiler.com/Mailing-Lists/FreeBSD/questions/2008-09/msg01375.html Interesting thread. Guess I'll give it a few spins

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Les Mikesell
Kevin Krieser wrote: I'll second the recommendation for clonezilla. It knows enough about most filesystems (including windows ntfs) to only store the used blocks and it can use network storage over nfs, smb, or sshfs if you use the bootable CD clonezilla-live version. If you do a lot

Re: [CentOS] Question about dd (fill a hard disks' unused space with blanks)

2009-06-07 Thread Kevin Krieser
On Jun 7, 2009, at 2:59 PM, Les Mikesell wrote: Kevin Krieser wrote: I'll second the recommendation for clonezilla. It knows enough about most filesystems (including windows ntfs) to only store the used blocks and it can use network storage over nfs, smb, or sshfs if you use the