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Interpretation of fdisk command

edited Jan 26, 2015 4:54AM in Exadata General (MOSC) 2 commentsAnswered

Hello experts,

                     We all know that first 2 disks(/dev/sda and /dev/sdb) are system disk where os and cell software is installed.I am not a linux admin but it seems to support exadata box one should have good knowledge in unix/linux also.Can you please help me to understand how come one disks have 255 heads?Is it a logical representation or physical?

fdisk -l /dev/sda

Disk /dev/sda: 1998.9 GB, 1998998994944 bytes
255 heads, 63 sectors/track, 243031 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          15      120456   fd  Linux raid autodetect
/dev/sda2              16          16        8032+  83  Linux
/dev/sda3              17      239246  1921614975   83  Linux

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