Hard Disk Performance

Discussion in 'Technical' started by redstar, May 2, 2005.

  1. redstar

    redstar New Member

    I get the feeling that my hard disk is very slow. Is there a way I can verify and tune it?
  2. falko

    falko Super Moderator Howtoforge Staff Moderator HowtoForge Supporter ISPConfig Developer

    You can use hdparm to tune your hard disk. On Debian, you would run

    apt-get install hdparm
    to install it.

    hdparm --help
    shows a list of all available options. To get more information about your hard disk, run

    hdparm -i /dev/hda
    This will look like:

     Model=MAXTOR 6L060J3, FwRev=A93.0500, SerialNo=663214759549
     Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
     RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
     BuffType=DualPortCache, BuffSize=1819kB, MaxMultSect=16, MultSect=16
     CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=117266688
     IORDY=on/off, tPIO={min:120,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
     AdvancedPM=no WriteCache=enabled
     Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1:
     * signifies the current active mode
    To see how fast your hard disk currently is execute

    hdparm -tT /dev/hda
    The output:
     Timing cached reads:   972 MB in  2.00 seconds = 486.00 MB/sec
     Timing buffered disk reads:   72 MB in  3.08 seconds =  23.38 MB/sec
    Now you can run
    hdparm -c1 -d1 -X 66 /dev/hda
    to tune your hard disk. The X flag stands for the transfer mode (PIO: 8; DMA: 32; U-DMA: 64) + the number of the mode (2 for udma2: 64 + 2 = 66).

    Now run
    hdparm -tT /dev/hda
    again, and if you're lucky, your hard disk should have become "faster".

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