Date: Tue, 14 May 2002 20:14:03 -0700 From: Lou Katz <lou@metron.com> To: freebsd-stable@FreeBSD.ORG Subject: Tar broken for large files? Message-ID: <20020514201403.A38469@metron.com>
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I have a directory on a backup machine which contains gzipped epoch dumps of various file systems. I tried to tar the directory to a DDS3 tapedrive, and noticed that it finished awfully quickly. When I did a tar | dd of=tapedrive I saw that the number of bytes/blocks written was sorely lacking. uname -a: FreeBSD shadow.metron.com 4.5-RELEASE FreeBSD 4.5-RELEASE #0 The original directory: shadow# ls -l total 10278592 -rw-r--r-- 1 root wheel 26159161 May 10 03:03 epoch.root.gz -rw-r--r-- 1 root wheel 3668941475 Apr 28 21:06 epoch.users.gz -rw-r--r-- 1 root wheel 33832960 May 10 03:14 epoch.usr.gz -rw-r--r-- 1 root wheel 150377578 May 13 04:48 epoch.work.gz -rw-r--r-- 1 root wheel 4445344874 May 13 04:48 epoch.work.gz.orig -rw-r--r-- 1 root wheel 2197885923 May 5 17:41 local.tgz tarring to a tapedrive, then reading the tape: shadow# tar -cvf /dev/rsa0 * epoch.root.gz epoch.users.gz epoch.usr.gz epoch.work.gz local.tgz shadow# tar -tvf /dev/rsa0 -rw-r--r-- root/wheel 26159161 May 10 03:03 2002 epoch.root.gz -rw-r--r-- root/wheel -626025821 Apr 28 21:06 2002 epoch.users.gz -rw-r--r-- root/wheel 33832960 May 10 03:14 2002 epoch.usr.gz -rw-r--r-- root/wheel 150377578 May 13 04:48 2002 epoch.work.gz -rw-r--r-- root/wheel -2097081373 May 5 17:41 2002 local.tgz Extracting, for instance epoch.work.gz, which appears to be woefully small, results in shadow# gunzip < epoch.work.gz|restore -tvf - Verify tape and initialize maps Dump date: Mon May 13 03:01:00 2002 Dumped from: the epoch Level 0 dump of /work on violet.metron.com:/dev/ar0s1e Label: none Extract directories from tape Mangled directory: reclen not multiple of 4 ^Crestore interrupted, continue? [yn] n Here is the attempt to see what is going on: shadow# tar -cf - * | dd bs=40k of=/dev/rsa0 0+20545 records in 0+20545 records out 210380800 bytes transferred in 295.953683 secs (710857 bytes/sec) Obviousls, tar is not copying things correctly. Is this a known bug? # tar --version GNU tar version 1.11.2 -- -=[L]=- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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