hi, under mandrake's distro 9.0 : 2.4.19-16mdksecure , I get occasional bad reads from disk into buffer. filesystem reiserfs (if that matters), /etc/fstab: /dev/hdd2 /mnt/pepsi reiserfs encrypted,encryption=AES,notail 1 1 it appears that the corruption is always in 17-byte chunks. Also, the buffer stays same until it is removed and re-read. please note that in the examples below, disk reading activities were performed between comparisons (cmp -l), to force invalidation of the current buffer in hopes that next read would re-read the disk and get the copy into the buffer correctly. Sometimes it is read into the buffer correctly, sometimes not, as can be seen from below. through the whole experiment, the files (pepsi-semifinal-JYp*m) haven't changed, but cmp -l has reported them differently a few times. what's wrong ? how can this be fixed ? what do i do ? thanks - rkelly # cmp -l pepsi-semifinal-JYp*m ; echo $? 4198353 110 34 4198354 267 226 4198355 40 112 4198356 143 105 4198357 161 117 4198358 127 34 4198359 333 110 4198360 51 135 4198361 374 77 4198362 131 213 4198363 333 212 4198364 132 11 4198365 156 161 4198366 64 36 4198367 5 225 4198368 261 274 4198378 32 72 1 # cmp -l pepsi-semifinal-JYp*m ; echo $? 0 # ll pepsi-semifinal-JYp* -rw------- 1 root root 28395732 Mar 16 13:59 pepsi-semifinal-JYp-x1 -rw-rw-r-- 1 simon simon 28395732 Mar 14 22:08 pepsi-semifinal-JYp-x2 # cmp -l /tmp/pepsi-semifinal-JYp*m ; echo $? 9543633 50 324 9543634 172 312 9543635 75 322 9543636 172 107 9543637 346 355 9543638 73 165 9543639 220 313 9543640 307 273 9543641 353 254 9543642 217 5 9543643 11 234 9543644 131 51 9543645 251 340 9543646 66 270 9543647 43 141 9543648 112 4 9543658 275 235 10506193 243 223 10506194 235 146 10506195 217 161 10506196 371 5 10506197 113 305 10506198 47 112 10506199 50 171 10506200 71 111 10506201 30 251 10506202 37 226 10506203 276 324 10506204 177 131 10506205 316 203 10506206 56 326 10506207 255 236 10506208 6 132 10506218 137 177 1 1149 [1] # cmp -l /tmp/pepsi-semifinal-JYp*m ; echo $? 9543633 50 324 9543634 172 312 9543635 75 322 9543636 172 107 9543637 346 355 9543638 73 165 9543639 220 313 9543640 307 273 9543641 353 254 9543642 217 5 9543643 11 234 9543644 131 51 9543645 251 340 9543646 66 270 9543647 43 141 9543648 112 4 9543658 275 235 10506193 243 223 10506194 235 146 10506195 217 161 10506196 371 5 10506197 113 305 10506198 47 112 10506199 50 171 10506200 71 111 10506201 30 251 10506202 37 226 10506203 276 324 10506204 177 131 10506205 316 203 10506206 56 326 10506207 255 236 10506208 6 132 10506218 137 177 1 root@xxxx:/home/simon Thu Mar 13 12:47:21 # cmp -l /tmp/pepsi-semifinal-JYp*m ; echo $? 9543633 50 324 9543634 172 312 9543635 75 322 9543636 172 107 9543637 346 355 9543638 73 165 9543639 220 313 9543640 307 273 9543641 353 254 9543642 217 5 9543643 11 234 9543644 131 51 9543645 251 340 9543646 66 270 9543647 43 141 9543648 112 4 9543658 275 235 10506193 243 223 10506194 235 146 10506195 217 161 10506196 371 5 10506197 113 305 10506198 47 112 10506199 50 171 10506200 71 111 10506201 30 251 10506202 37 226 10506203 276 324 10506204 177 131 10506205 316 203 10506206 56 326 10506207 255 236 10506208 6 132 10506218 137 177 1 root@xxxx:/home/simon Thu Mar 13 12:47:50 # cmp -l /tmp/pepsi-semifinal-JYp*m ; echo $? 0 root@xxxx:/home/simon Thu Mar 13 13:49:12 - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/
