Comment 1 for bug 625878

After some talking with Peter Zaitsev we found that in nonstream mode backup work properly, but with these message

xtrabackup: innodb_log_file_size = 1073741824
>> log scanned up to (258630780823)
Copying ./ibdata1
     to /home/backup/2010-11-06_21-14-07/ibdata1
xtrabackup: Page 64 seems double write buffer. passing the check.
xtrabackup: Page 65 seems double write buffer. passing the check.
...
xtrabackup: Page 191 seems double write buffer. passing the check.
>> log scanned up to (258630816455)

in stream mode tar4ibd stop read data file after 67 x 16K read,

strace
...
read(3, "1C\341\300\0\0\0>\0\0\7\0\0\0\4\36\0\0\0;C+\362/E\277\0\0\0\0\0\0"..., 16384) = 16384
write(1, "1C\341\300\0\0\0>\0\0\7\0\0\0\4\36\0\0\0;C+\362/E\277\0\0\0\0\0\0"..., 512) = 512
....

write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 512) = 512
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
lseek(3, -16384, SEEK_CUR) = 1048576
read(3, "'\361\375W\0\f\0\1\0\0\0\0\0\0\0\0\0\0\0<\\\226\204\326\0\5\0\0\0\0\0\0"..., 16384) = 16384
write(2, "The file 'ibdata1' may not be In"..., 67) = 67
write(2, "tar_append_tree(\"ibdata1\", \"ibda"..., 58) = 58