Date: Fri, 9 Dec 2011 07:21:21 +0100 From: Matthias Apitz <guru@unixarea.de> To: Dan Nelson <dnelson@allantgroup.com> Cc: freebsd-questions@freebsd.org, freebsd-usb@freebsd.org Subject: Re: restore(8) to UFS on USB key: terrible slow Message-ID: <20111209062121.GA39981@tinyCurrent> In-Reply-To: <20111208155713.GC53453@dan.emsphone.com> References: <20111208063711.GA6482@tinyCurrent> <20111208155713.GC53453@dan.emsphone.com>
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El día Thursday, December 08, 2011 a las 09:57:13AM -0600, Dan Nelson escribió: > Cheap USB thumb drives aren't really optimized for small random-I/O writes. > Can you try mounting the filesystem async? that might help a little. A > workaround would be to use mdconfig to create a block device (backed by > either swap or a file on your hard drive) the same size as your flash drive, > newfs and restore to that, then umount the filesystem and dd the raw image > directly to your flash drive. Hello Dan, Thanks for your hints. I tend to add that those USB thum drives aren't good for anything. I have a certain number of them containing each a complete bootable FreeBSD (including 'src', 'obj' and binary packages) to install my laptops and netbooks from them; after some time these USB keys tend to loose data: files are corrupt a bit, dirs are missing and so on; that's why I wanted to make dump(8) nackups of them, to restore them from time to time; I will drop the idea and will just make dd(1) backups of the full /dev/da0; thanks matthias -- Matthias Apitz t +49-89-61308 351 - f +49-89-61308 399 - m +49-170-4527211 e <guru@unixarea.de> - w http://www.unixarea.de/ UNIX since V7 on PDP-11 | UNIX on mainframe since ESER 1055 (IBM /370) UNIX on x86 since SVR4.2 UnixWare 2.1.2 | FreeBSD since 2.2.5
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