Date: Sat, 09 Feb 2002 11:01:18 -0600 From: jacks@sage-american.com To: freebsd-questions@freebsd.org Subject: Using dd to clone HD Message-ID: <3.0.5.32.20020209110118.0195ca18@mail.sage-american.com>
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On a FBSD box (4.5-stable) with two identical HDs and in the abscence of a good IDE HD mirror solution in pursuit of making an exact clone of HD0 to HD1, I thought I would give "dd" a try. I've seen several postings about the syntax to use and I'm not completely clear about the "bs=0000" parameter to use, if one is used at all. I seen: dd bs=4096k if=/dev/ad0 of=/dev/ad1 or... dd if=/dev/ad0 of=/dev/ad1 bs=8192 or... that the bs should be set to 2048 for "faster" copy. Questions: 1) Will the above make an exact clone of identical HD0 to HD1..?? 2) Should the the "bs" be used..?? 3) If "bs" should be use, how do I determine which one: 2048, 4096, 8192...?? 4) should bs be used as in #1 or #2 or both okay..?? I suspect this can screw up the HD if not careful.... so any expert tips appreciated. Best regards, Jack L. Stone, Server Admin =================================================== Sage-American http://www.sage-american.com jacks@sage-american.com "My center is giving way, my right is in retreat; ....situation excellent! ....I shall attack!" =================================================== To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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