Acronis os selector 8.0 User Manual

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This is where the 7.9 GB maximum accessible disk size limitation for the 
usual functions comes from. The areas of a hard disk that lay beyond 
this limit can be accessed only via extended disk access functions 
(interrupt 13h, functions 41h–48h). 
•  Total size  is  the  size  of  the  hard  disk  that  is  available  for  Acronis  OS 
Selector. 
7.8.2 
Hard Disk Property Sheet 
This sheet shows the information that is stored in the BIOS hard disk 
parameters table. This table exists for disks number 80h and 81h and stores 
the values of the following parameters: 
•  The number of cylinders, heads, and sectors. These parameters usually 
reflect the structure of the hard disk more correctly than function 8, but 
not all the BIOSes fill these parameters properly. 
•  Precompensation cylinder, landing cylinder, defect map, ECC and access 
retry. These parameters are of no particular practical value. 
•  The number of physical cylinders, heads, and sectors. These parameters 
usually correspond to the hard disk structure in the «Normal» mode, but 
again, not all the BIOSes fill these parameters properly. 
 
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Chapter 7 : Main Operations with Disk Administrator