Date: Tue, 13 Sep 2011 01:33:27 +0200 From: Polytropon <freebsd@edvax.de> To: Toomas Aas <toomas.aas@raad.tartu.ee> Cc: questions@freebsd.org Subject: Re: Crash when copying large files Message-ID: <20110913013327.f3bdc95d.freebsd@edvax.de> In-Reply-To: <20110913001445.15346yix2qz78j4s@webmail.raad.tartu.ee> References: <20110913001445.15346yix2qz78j4s@webmail.raad.tartu.ee>
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On Tue, 13 Sep 2011 00:14:45 +0300, Toomas Aas wrote: > Hello! > > I'm trying to move a filesystem to a new larger RAID volume. The old > filesystem was using gjournal, and I have also created the new > filesystem with gjournal. The FS in question holds the DocumentRoot of > our web server, and in its depths, a couple of fairly large (several > gigabytes) files are lurking. > > I've mounted the new FS under /mnt and use tar to transfer the files: > > cd /mnt > tar -c -v -f - -C /docroot . | tar xf - > > It seems that these large files cause a problem. Sometimes when the > process reaches one of these files, the machine reboots. It doesn't > create a crashdump in /var/crash, which may be because the system has > less swap (2 GB) than RAM (8 GB). Fortunately the machine comes back > up OK, except that the target FS (/mnt) is corrupt and needs to be > fsck'd. I've tried to re-run the process three times now, and caused > the machine to crash as it reaches one or another large file. Any > ideas what I should do to avoid the crash? The par program operates on a per-file basis. In case that causes a problem, try to leave this route and use the "old- fashioned" tools dump and restore. Make sure the file system isn't mounted, then use: # cd /your/target/directory # dump -0 -f - /dev/<sourcedev> | restore -r -f - wheree <sourcedev> refers to the device you've initially mounted /mnt from. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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