https://bugzilla.novell.com/show_bug.cgi?id=463829 User pgnet.trash@gmail.com added comment https://bugzilla.novell.com/show_bug.cgi?id=463829#c53 pgnet _ <pgnet.trash@gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |ASSIGNED Info Provider|pgnet.trash@gmail.com | --- Comment #53 from pgnet _ <pgnet.trash@gmail.com> 2009-02-11 09:54:17 MST --- (In reply to comment #52)
Thanks, and after reboot, you still get the same values when you repeat only the reading and checksumming part of the test?
apparently, yes. @ previous test, sha1sum TESTOUT 0c9887a542db36a6f122f1f9f7a6ae1049e661ef TESTOUT checking, uname -ri 2.6.27.14-bug463829_dbg0_d49a1108-default x86_64 reboot ... for ((i=0;i<3;i++)); do dd if=/dev/sda of=TESTOUT bs=1M count=512; sha1sum TESTOUT; done 512+0 records in 512+0 records out 536870912 bytes (537 MB) copied, 11.176 s, 48.0 MB/s 0c9887a542db36a6f122f1f9f7a6ae1049e661ef TESTOUT 512+0 records in 512+0 records out 536870912 bytes (537 MB) copied, 2.8667 s, 187 MB/s 0c9887a542db36a6f122f1f9f7a6ae1049e661ef TESTOUT 512+0 records in 512+0 records out 536870912 bytes (537 MB) copied, 3.58828 s, 150 MB/s 0c9887a542db36a6f122f1f9f7a6ae1049e661ef TESTOUT
If so, can you please try again with something larger than 4G?
re-do, with > 4GB dd if=/dev/urandom of=TESTTMPFILE bs=1M count=5120 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 1045.78 s, 5.1 MB/s sha1sum TESTTMPFILE 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTTMPFILE dd if=TESTTMPFILE of=/dev/sda bs=1M count=5120 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 168.142 s, 31.9 MB/s for ((i=0;i<3;i++)); do dd if=/dev/sda of=TESTOUT bs=1M count=5120; sha1sum TESTOUT; done 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 79.4242 s, 67.6 MB/s 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTOUT 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 85.0126 s, 63.2 MB/s 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTOUT 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 76.8508 s, 69.9 MB/s 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTOUT reboot ... for ((i=0;i<3;i++)); do dd if=/dev/sda of=TESTOUT bs=1M count=5120; sha1sum TESTOUT; done 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 92.8563 s, 57.8 MB/s 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTOUT 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 91.8821 s, 58.4 MB/s 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTOUT 5120+0 records in 5120+0 records out 5368709120 bytes (5.4 GB) copied, 82.8299 s, 64.8 MB/s 06be6cd14f9ff6555da2bd8573d9e56f292330a3 TESTOUT
It's really strange ...
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