The dd blocksize argument is basically the a buffer allocation size when reading and writing. A large block size simply makes the kernel and system calls more efficient (less of them). It has no bearing on the actual disc structure.
(to dd, everything is a file,it knows nothing of "disks") Martin Martin Visser ,CISSP Network and Security Consultant Technology & Infrastructure - Consulting & Integration HP Services 3 Richardson Place North Ryde, Sydney NSW 2113, Australia Phone *: +61-2-9022-1670 Mobile *: +61-411-254-513 Fax 7: +61-2-9022-1800 E-mail * : martin.visserAThp.com -----Original Message----- From: Chris Barnes [mailto:[EMAIL PROTECTED] Sent: Monday, 29 September 2003 12:25 PM To: SLUG Subject: RE: [SLUG] copying whole disks with knoppix Just a quick question, is there any easy way to determine the block size on a hard disk? Because most people might omit the 'bs'option because they aren't sure of the block size and they don't want to stuff anything up. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tony Green Sent: Monday, 29 September 2003 11:33 AM To: [EMAIL PROTECTED] Subject: Re: [SLUG] copying whole disks with knoppix On Mon, 2003-09-29 at 11:29, Dave Kempe wrote: > that dd command so it might work - i just found dd to be really slow for > even an 8GB drive. Usually caused by a lack of the option 'bs=8192k' (or similar) Make sure you have dma etc enabled on the drives too -- Tony Green <[EMAIL PROTECTED]> -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug -- SLUG - Sydney Linux User's Group - http://slug.org.au/ More Info: http://lists.slug.org.au/listinfo/slug
