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    SSD upgrade running at UDMA Mode 2!

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by ibazar83, Jun 13, 2009.

  1. ibazar83

    ibazar83 Newbie

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    Hello! As described in this topic, a guy did an upgrade on his LG C1 notebook: he passed from a PATA hdd to a Kingspec 128GB SSD (ZIF2). With the original hdd the bios showed UDMA Mode 5, with the new one only UDMA Mode 2, with the consequence that the max speed (confirmed by the tests) is about 33 MB/sec instead of 100 MB/sec. Can someone guess the cause? Some hints?
    Thanks you all!!
     
    ibazar83, Jun 13, 2009
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  2. User Retired 2

    User Retired 2 Notebook Nobel Laureate NBR Reviewer

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    Worth working through relevant troubleshooting steps outlined here. Likely the Windows driver has defaulted to a lower speed and needs a registry fix to correct. Otherwise double-check cabling as that could introduce errors for the driver to drop down to UDMA2 speeds. hdparm can switch to UDMA5 mode (hdparm -X udma5 /dev/sda) and perform timing tests to confirm the higher transfer speed.
     
    User Retired 2, Jun 13, 2009
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  3. ibazar83

    ibazar83 Newbie

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    Thanks Nando. When forcing with hdparm, the ssd run at udma5 mode, at the expexted speed (65 MB/sec). Does that say something? Do you still think it could depend from cable--> driver? Thank you for your informations.
     
    ibazar83, Jun 13, 2009
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