Mailinglist Archive: opensuse (3442 mails)

["Karol Pietrzak" <noodlez84@xxxxxxxxxxxxx>]

On 1 Dec 2001, Raúl Gutiérrez Segalés wrote:

> beyond:~ # hdparm /dev/hda
>
> /dev/hda:
>  multcount    = 16 (on)
>  I/O support  =  0 (default 16-bit)
>  unmaskirq    =  0 (off)
>  using_dma    =  0 (off)
>  keepsettings =  0 (off)
>  nowerr       =  0 (off)
>  readonly     =  0 (off)
>  readahead    =  8 (on)
>  geometry     = 1216/255/63, sectors = 19541088, start = 0
>
> may I simply :
>
> # hdparm -d1 /dev/hda
>
> any other harddrive performance improving tip? :-)

Also check out the "-X' option [man hdparm].  It allows you to
set IDE mode (UDMA 1,2, etc.).  On my machine, for example, my
hard drive does not default to UDMA 66, which it can do.
'hdparm -I /dev/hda' will tell you what's it doing now.


       -X     Set  the  IDE  transfer  mode for newer (E)IDE/ATA2
              drives.  This is typically used in combination with
              -d1  when  enabling  DMA  to/from a drive on a sup-
              ported interface chipset (such as the  Intel  430FX
              Triton), where -X34 is used to select multiword DMA
              mode2 transfers.  Apart from that, use of this flag
              is  seldom  necessary  since  most/all  modern  IDE
              drives default to their fastest PIO  transfer  mode
              at  power-on.  Fiddling with this can be both need-
              less and risky.  On drives which support  alternate
              transfer  modes,  -X can be used to switch the mode
              of the drive only.  Prior to changing the  transfer
              mode,  the IDE interface should be jumpered or pro-
              grammed (see -p flag) for the new mode  setting  to
              prevent  loss  and/or corruption of data.  Use this
              with extreme  caution!

--
Karol Pietrzak
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