CHS vs LBA - absolutne nechapem

[Rybarik, Michal]

zdravim all, 

mal som v masine 2 identicke 60gb disky, raid0, jeden z nich (hdc) odisiel. 
vymenil som ho za identicky model, teda adpon nalepky na disku. hdparm vsak 
hovori nieco ine, tvrdi ze je to len 20gb, po fdisknuti a naformatovani sa 
tento moj dojem len potvrdil. aj podla typu z hdparm a googla je to len 20gb. 
takze nejaky odrb s nalepkou. 

ale - co neviem pochopit - ako je mozne, ze oba disky hlasia rovnaku CHS 
geometriu, ale iny pocet LBA sektorov?? viete mi to niekto vysvetlit?

/dev/hda:

ATA device, with non-removable media
        Model Number:       Maxtor 5T060H6                          
        Serial Number:      T6HHLLAC            
        Firmware Revision:  TAH71DP0
Standards:
        Used: ATA/ATAPI-6 T13 1410D revision 0 
        Supported: 6 5 4 3 
Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           16      16
        sectors/track   63      63
        --
        CHS current addressable sectors:   16514064
        LBA    user addressable sectors:  120103200
        device size with M = 1024*1024:       58644 MBytes
        device size with M = 1000*1000:       61492 MBytes (61 GB)


/dev/hdc:

ATA device, with non-removable media
        Model Number:       Maxtor 52049H4                          
        Serial Number:      K40XGZ7C            
        Firmware Revision:  DAC10SC0
Standards:
        Used: ATA/ATAPI-6 T13 1410D revision 0 
        Supported: 6 5 4 3 
Configuration:
        Logical         max     current
        cylinders       16383   16383
        heads           16      16
        sectors/track   63      63
        --
        CHS current addressable sectors:   16514064
        LBA    user addressable sectors:   40020624
        device size with M = 1024*1024:       19541 MBytes
        device size with M = 1000*1000:       20490 MBytes (20 GB)

dakujem...
michal rybarik