CHS vs LBA - absolutne nechapem

[Novikmec Jozef]

Neviem ci ti odpoviem spravne a na to co chces pocut:-), ale minule som
robil RAID1 a mal som dva identicke disky. Kym boli zapojene ako hda, hdb,
tak vyzerali ze maju rovnaku geometriu CHS, ale ked som jeden z nich
prehodil na hdc, tak uz to papulovalo v fdisku, ze nesedia konce particie
(fyzicke a logicke).

No a potom v Large Disk HOWTO som sa docital, ze pre hda a hdb berie Linux
geometriu z BIOSu a pre ostatne uz si nepamatam ako, ale ze preto su
rozdielne.

> 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