problème sur partitions reiserfs

--(/home/bobuss/)--> hdparm -t /dev/hda2
 
/dev/hda2:
 Timing buffered disk reads:   14 MB in  3.34 seconds =   4.19 MB/sec
 
--(/home/bobuss/)--> hdparm -t /dev/hda6
 
/dev/hda6:
 Timing buffered disk reads:   26 MB in  3.33 seconds =   7.81 MB/sec

--(/home/bobuss/)--> hdparm -t /dev/hda1
 
/dev/hda1:
 Timing buffered disk reads:   76 MB in  3.03 seconds =  25.08 MB/sec

--(/home/bobuss/)--> hdparm -t /dev/hda5
 
/dev/hda5:
 Timing buffered disk reads:  128 MB in  3.02 seconds =  42.38 MB/sec

--(/home/bobuss/)--> hdparm  /dev/hda  
 
/dev/hda:
 multcount    = 16 (on)
 IO_support   =  1 (32-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  0 (off)
 readahead    =  8 (on)
 geometry     = 14946/255/63, sectors = 240121728, start = 0