From owner-freebsd-questions Fri Nov 2 14:34:50 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mcqueen.wolfsburg.de (pns.wobline.de [212.68.68.5]) by hub.freebsd.org (Postfix) with ESMTP id A041137B408 for ; Fri, 2 Nov 2001 14:34:47 -0800 (PST) Received: from colt.ncptiddische.net (ppp-239.wobline.de [212.68.69.250]) by mcqueen.wolfsburg.de (8.11.3/8.11.3/tw-20010821) with ESMTP id fA2MYRN00587; Fri, 2 Nov 2001 23:34:27 +0100 Received: from howie.ncptiddische.net (howie.ncptiddische.net [192.168.0.3]) by colt.ncptiddische.net (8.11.6/8.11.6) with ESMTP id fA2Mb1729314; Fri, 2 Nov 2001 23:37:01 +0100 (CET) (envelope-from nils@tisys.org) Received: from howie.ncptiddische.net (howie.ncptiddische.net [192.168.0.3]) by howie.ncptiddische.net (8.11.6/8.11.6) with ESMTP id fA2MYXa01459; Fri, 2 Nov 2001 23:34:33 +0100 (CET) (envelope-from nils@tisys.org) Date: Fri, 2 Nov 2001 23:34:33 +0100 (CET) From: Nils Holland To: David Kelly Cc: Jim Arnold , Cliff Sarginson , Subject: Re: Splitting a tar archive In-Reply-To: <20011102155013.B60019@grumpy.dyndns.org> Message-ID: <20011102232955.W1449-100000@howie.ncptiddische.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Fri, 2 Nov 2001, David Kelly wrote: > The problem with this method is (I've noticed) some CD drives report > end of media with the block of data which has touched EOM and possibly > the read returned less than a full buffer, and others report EOM only > after one has attempted to read past EOM and no data was returned. So > its possible to lose the last block with some drives. Noticed this > when I wanted to verify a FreeBSD ISO by lifting it raw off of the > disk with dd. Philips ATAPI CD-RW read short. HP SCSI CD-RW read > correctly. Believe Sony ATAPI CD-RW read correctly. That problem (at least I guess that it's that problem) has occured here in the following way: When creating a multi-volume tar archive and burning the individual pieces to CD in RAW mode (i.e. not as an ISO fs), then restoring tends to be problematic - at least on my CD-ROM drive. If I try to restore from the first CD of a "raw" multi-volume tar CD-set, I get a lot of read errors at the end of the first CD. In fact, tar aborts after a large number of errors - it never noticed that it has reached the end of the first CD and should ask for the second CD. As a solution, I have to make an ISO out of each piece of the multi-volume archive. I have not yet been able to clearly find out if this is an issue with my CD-ROM driver or if it's generally impossible to put multi-volume tars onto CD as raw data... Greetings Nils Nils Holland Ti Systems - FreeBSD in Tiddische, Germany http://www.tisys.org * nils@tisys.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message