Someone gave my an iMAC G3/500 (2000). It is working fine but the hard drive make an annoying spinning noise. The noise is regular, nothing to do with the read/write operations. The disk model/brand is 93073U4 Maxtor 30.7 Gb. I am wondering whether this noise is due to the disk ageing, or maybe this is normal for this model ? I have another iMACG3/600 (2001) which is almost silent as it runs.