SMC Networks 1232 Series Manual De Usuario

  

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53

 

 

Modern hard-disks have more cylinders than maximum number of cylinders permitted by DOS, 
so, theoretically, a DOS machine couldn’t use a modern big-sized hard disk. This problem is 
solved using a special addressing mechanism. This “mechanism” is called translation. The most 
common translation methods are LBA (Logical Block Addressing) and ECHS (Enhanced 
Cylinders - Heads - Sectors). 
 

LBA translation 

Default setting for both 
ATAPI Units (Master1 & 
Slave1) 
(*) = Default setting

 

Extended CHS translation 

 

 
 

Number of hard-disk cylinders (normally written on the disk label). If the autodetection is used 
(suggested method!), the cylinders value is ignored by the BIOS. 
 

Number of cylinders 

0 is the default setting for 
both ATAPI Units (Master1 
& Slave1) 

 
 

Number of hard-disk heads (normally written on the disk label). If the autodetection is used 
(suggested method!), the heads value is ignored by the BIOS. 
 

Number of heads 

0 is the default setting for 
both ATAPI Units (Master1 
& Slave1) 

 
 

Number of sectors per track (normally written on the disk label). If the autodetection is used, the 
sectors value is ignored by the BIOS. 
 

Number of sectors per track 

0 is the default setting for 
both ATAPI Units (Master1 
& Slave1) 

 
 

This is the hard-disk size, in Mbytes, calculated by the BIOS, using either the autodetect method 
or the user hand-written values (for cylinders, heads and sectors). 
 
•  Note: the size cannot be changed directly by the user.