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Thread: Disks very Slow

  1. #1
    Join Date
    Oct 2007
    Location
    Colombia
    Posts
    65

    Disks very Slow

    Hello!

    I have machine (Dual Opteron 244) with a Tyan GX28. This board have a Silicon Image 3114 PCI to 4 port SATA.

    The problem is when I do a mkfs.ext3 on one disk it takes more than 4 hours on 1TB disk. The chipset have support in the kernel but when I do hdparam -i /dev/sdb I get that it dosn't have DMA or UDMA modes enabled.

    # hdparm -i /dev/sdb

    /dev/sdb:

    Model=ST31000528AS , FwRev=CC34 , SerialNo= 9VP022RB
    Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
    RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
    BuffType=unknown, BuffSize=0kB, MaxMultSect=16, MultSect=?16?
    CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
    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: unknown: ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7

    * signifies the current active mode

    It's CentOs 5.3 and the kernel is 2.6.18-128.7.1.el5. I also tried to enable AHCI to the board but I can't found the option in the BIOS.

    Any idea to solve this problem?

    Thank you!
    Jose David Bravo | jbravo[at]colombiahosting.com.co
    ColombiaHosting High Quality Hosting in Colombia
    www.colombiahosting.com.co

  2. #2
    Join Date
    Sep 2004
    Location
    Chicago, IL
    Posts
    213
    is it on a raid?
    Did you try hdprarm -Tt /dev/...
    Ben Lenard, MS, MBA
    TechMinds 4 Hire, Inc - (866) 214-1285 x 2001
    http://www.tm4h.com

  3. #3
    Join Date
    Oct 2007
    Location
    Colombia
    Posts
    65
    Hello blenard,

    The disk is not on raid.

    # hdparm -Tt /dev/sdb

    /dev/sdb:
    Timing cached reads: 2384 MB in 2.00 seconds = 1191.69 MB/sec
    Timing buffered disk reads: 26 MB in 3.10 seconds = 8.40 MB/sec

    Thank you!
    Jose David Bravo | jbravo[at]colombiahosting.com.co
    ColombiaHosting High Quality Hosting in Colombia
    www.colombiahosting.com.co

  4. #4
    Join Date
    Sep 2004
    Location
    Chicago, IL
    Posts
    213
    8.4 mbps - that's not good.
    Did you try a different MB?
    Ben Lenard, MS, MBA
    TechMinds 4 Hire, Inc - (866) 214-1285 x 2001
    http://www.tm4h.com

  5. #5
    Join Date
    Feb 2008
    Location
    Houston, Texas, USA
    Posts
    2,955
    I wouldn't use hdparm with a SATA disk. Use sdparm instead.

    Regards
    UNIXy - Fully Managed Servers and Clusters - Established in 2006
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