–TEST SPEED WITH EXT3–

Go to where the filesystem you mounted is at:

# cd /mnt/r55

-WRITE TEST:-

ZEROS DATA:

# dd if=/dev/zero of=testfile0 bs=8k count=10000; sync;
Hit CONTROL-C after 5 seconds to get results
30703616 bytes (31 MB) copied, 7.94884 s, 3.9 MB/s

RANDOM DATA:

# dd if=/dev/urandom of=testfileR bs=8k count=10000; sync;
Hit CONTROL-C after 5 seconds to get results
65994752 bytes (66 MB) copied, 21.8919 s, 3.0 MB/s

-READ TEST:-

ZEROS DATA:

# dd if=testfile0 of=/dev/null
29368320 bytes (29 MB) copied, 0.780934 s, 37.6 MB/s

RANDOM DATA:

dd if=testfileR of=/dev/null
30842880 bytes (31 MB) copied, 1.05709 s, 29.2 MB/s

OTHER READ TEST:

# hdparm -Tt /dev/md0
Timing cached reads: 16280 MB in 2.00 seconds = 8158.98 MB/sec
Timing buffered disk reads: 42 MB in 3.13 seconds = 13.42 MB/sec
# hdparm -Tt –direct /dev/md0
Timing O_DIRECT cached reads: 6928 MB in 2.00 seconds = 3466.79 MB/sec
Timing O_DIRECT disk reads: 58 MB in 3.30 seconds = 17.55 MB/sec

DONT FORGET TO REMOVE THE TEST FILES
# rm testfileR
# rm testfile0