I think that was a tongue in cheek answer, it should mean that the fix would be in one of the upcoming kernel changes. Anyway here's my output from gutsy :- sudo hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 622 MB in 2.00 seconds = 310.37 MB/sec Timing buffered disk reads: 84 MB in 3.03 seconds = 27.77 MB/sec Then did :- /dev/sdb: Model=SAMSUNG SP0802N , FwRev=TK100-24, SerialNo=S00JJ10X390473 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=?16? CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=156368016 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 AdvancedPM=no WriteCache=enabled Drive conforms to: ATA/ATAPI-7 T13 1532D revision 0: ATA/ATAPI-1,2,3,4,5,6,7 What is that MultiSect= ?16? about ? Then did :- sudo hdparm -a1 -A1 -d1 /dev/sdb Password: /dev/sdb: setting fs readahead to 1 setting using_dma to 1 (on) HDIO_SET_DMA failed: Inappropriate ioctl for device setting drive read-lookahead to 1 (on) readahead = 0 (off) look-ahead = 1 (on) Now can anybody tell me the difference between readahead & look-ahead ? Which is better ? Also the DMA issue is still failing :( or should there be a different flag sudo hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 622 MB in 2.00 seconds = 310.74 MB/sec Timing buffered disk reads: 42 MB in 3.09 seconds = 13.60 MB/sec shirish@ubuntu:~$ sudo hdparm -i /dev/sdb As you can see the timing cached reads has improved a tiny bit but buffered disk reads have fallen behind Lastly, there is this :- sudo hdparm -i /dev/sdb /dev/sdb: Model=SAMSUNG SP0802N , FwRev=TK100-24, SerialNo=S00JJ10X390473 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=?16? CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=156368016 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120} PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5 AdvancedPM=no WriteCache=enabled Drive conforms to: ATA/ATAPI-7 T13 1532D revision 0: ATA/ATAPI-1,2,3,4,5,6,7 * signifies the current active mode The kernel is 2.6.22 rc something uname -a Linux ubuntu 2.6.22-6-generic #1 SMP Fri Jun 1 19:24:12 GMT 2007 i686 GNU/Linux hdparm shows up as 7.1-2 ubuntu1 aptitude show hdparm Package: hdparm State: installed Automatically installed: no Version: 7.1-2ubuntu1 Priority: standard Section: admin Maintainer: Ubuntu Core Developers