what is the meaning of * from fdisk -l command , regarding sda1 ?fdisk -l | grep /dev | grep */dev/sda1   *           1  4294967295  2147483647+  ee  GPT/dev/sdb1   *        2048     1050623      524288   fd  Linux raid autodetect/dev/sdc1   *        2048     1050623      524288   fd  Linux raid autodetectis it mean that sda1 was installed in the past with linux OS ?
fdisk -l + how to read output
linux;filesystems;partition;fdisk
The disk /dev/sda uses the GPT partition scheme. fdisk has limited support for that scheme; you may want to use gdisk or parted which have full support for GPT partition tables.On GPT partitioned disks, the disk management tools create a protective MBR partition table, which is intended to provide some modicum of protection against damage which may be done by disk management tools which don't understand GPT. The protective MBR contains one single partition of type ee, which covers the entire disk, or as much of the disk as possible (MBR partitions cannot be larger than 2 TB).So what you are seeing on /dev/sda is the fake partition in a protective MBR. Use sudo parted /dev/sda unit s print free to list the GPT partition table.