Comment 12 for bug 303429

Hello everyone,

Am experiencing the very same phenomenon on a Compaq Evo N440c under Karmic Koala 2.6.31-15-generic (#50-Ubuntu SMP Tue Nov 10 14:54:29 UTC 2009).

It would be great if this "bug" could find resolution.

sudo hdparm -v -i /dev/sda1 reveals:

/dev/sda1:
 multcount = 16 (on)
 IO_support = 1 (32-bit)
 readonly = 0 (off)
 readahead = 256 (on)
 geometry = 4864/255/63, sectors = 75923127, start = 63

 Model=WDC, FwRev=09.07D09, SerialNo=WD-WXEY04012112
 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
 BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
 CurCHS=17475/15/63, CurSects=16513875, LBA=yes, LBAsects=78140160
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes: pio0 pio3 pio4
 DMA modes: mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
 AdvancedPM=yes: unknown setting WriteCache=enabled
 Drive conforms to: Unspecified: ATA/ATAPI-1,2,3,4,5,6

 * signifies the current active mode

The drive is capable of UDMA/100. however it runs at UDMA/33.