dt7, moving target wfg ~% s fat [ 255 ] :-( Linux fat 2.6.39-rc3-dt7+ #234 SMP Tue Apr 19 17:23:44 CST 2011 x86_64 The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. No mail. Last login: Tue Apr 19 17:25:16 2011 from 10.255.20.73 wfg@fat ~% su root@fat /home/wfg# vi bin/test-tar-dd.sh root@fat /home/wfg# bin/test-tar-dd.sh umount: /dev/sda7: not mounted meta-data=/dev/sda7 isize=256 agcount=4, agsize=6170464 blks = sectsz=512 attr=2 data = bsize=4096 blocks=24681856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=12051, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 634.16 5029.23 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 13.6318 s, 76.9 MB/s dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.26s system 9% cpu 13.658 total tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.49s user 3.99s system 60% cpu 27.285 total 670.17 5262.84 root@fat /home/wfg# bin/test-tar-dd.sh meta-data=/dev/sda7 isize=256 agcount=4, agsize=6170464 blks = sectsz=512 attr=2 data = bsize=4096 blocks=24681856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=12051, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 678.41 5327.07 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 12.9063 s, 81.2 MB/s dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.26s system 9% cpu 12.961 total tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.78s user 4.40s system 65% cpu 26.125 total 713.93 5559.64 root@fat /home/wfg# bin/test-tar-dd.sh meta-data=/dev/sda7 isize=256 agcount=4, agsize=6170464 blks = sectsz=512 attr=2 data = bsize=4096 blocks=24681856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=12051, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 722.54 5626.94 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 13.3658 s, 78.5 MB/s dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.26s system 9% cpu 13.420 total tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.50s user 4.56s system 64% cpu 26.265 total 757.98 5855.34 root@fat /home/wfg# bin/test-tar-dd.sh meta-data=/dev/sda7 isize=256 agcount=4, agsize=6170464 blks = sectsz=512 attr=2 data = bsize=4096 blocks=24681856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=12051, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 766.10 5918.93 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 13.0385 s, 80.4 MB/s dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.30s system 9% cpu 13.103 total tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.50s user 4.18s system 62% cpu 26.766 total 801.72 6152.51 root@fat /home/wfg# root@fat /home/wfg# bin/test-tar-dd.sh meta-data=/dev/sda7 isize=256 agcount=4, agsize=6170464 blks = sectsz=512 attr=2 data = bsize=4096 blocks=24681856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=12051, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 994.01 7677.81 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 13.5859 s, 77.2 MB/s dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.31s system 9% cpu 13.650 total tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.60s user 4.03s system 60% cpu 27.463 total 1030.08 7917.72 7917.72 - 7677.81 = 239.91