Bob and other people, thanks for your response, it's very important to me. But I have my last short question:
Is it possible to use "dd" if I have to disks with the same size but different models like this: Disk A: description: SCSI Disk product: SAMSUNG SP0812C vendor: ATA physical id: 0.0.0 bus info: [EMAIL PROTECTED]:0.0 logical name: /dev/sda version: SU10 size: 74GB configuration: ansiversion=5 Disk B: description: SCSI Disk product: ST380013AS vendor: ATA physical id: 0.0.0 bus info: [EMAIL PROTECTED]:0.0 logical name: /dev/sda version: 3.43 size: 74GB configuration: ansiversion=5 Thanks a lot, alejandro.- Bob McGowan escribió: > Short answer: yes, that will work. > > Longer: showing example from my system. > > # dd if=/dev/sda of=sda-blocks bs=1024 count=4 > 4+0 records in > 4+0 records out > 4096 bytes (4.1 kB) copied, 0.0101397 seconds, 404 kB/s > # ls -l > total 4 > -rw-r--r-- 1 root root 4096 2006-12-21 08:33 sda-blocks > # file sd* > sda-blocks: x86 boot sector; partition 1: ID=0xfd, starthead 1, > startsector 63, 585922617 sectors, extended partition table (last)\011, > code offset 0x48 > > I copied the first 4K from my boot disk to a file using dd, and then > used 'file' to show that it has the: 1. x86 boot sector; 2. partition > information, including some data about the extended partition table. > > You should probably use the 'bs=' option to 'dd', to speed it up. In > cases where I've done this sort of thing, I've used block sizes that are > even multiples of the 'native' size. You do need to be sure not to use > up all of your available RAM with a size that's too big ;) > > I've found that 'bs=10k' seems to work well, though if you have plenty > of RAM you might want to try something bigger. > > Bob > > Alejandro wrote: >> Hi all, I have a Debian Etch machine with a SCSI HD as a master disk. I >> want to make a clon to another similar SCSI HD (same model and size), in >> order to use it if the production disk fails. >> >> People talk about "dd" command, telling it's possible to get a exact >> mirror from one disk to another just running this: >> >> dd if=/dev/sda of=/dev/sdb >> >> Is this just the solution ??? No matter with the MBR or something else >> ??? >> >> Really thanks, >> >> alejandro.- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
