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Operating Systems Solaris EFI disk labeling / understand the parition table / sectors not continue Post 303028443 by javanoob on Tuesday 8th of January 2019 08:05:38 AM
Old 01-08-2019
EFI disk labeling / understand the parition table / sectors not continue

Hi all,

I have a EFI disk and it is use in zfs pool.

Code:
partition> p
Volume:  rpool
Current partition table (original):
Total disk sectors available: 1172107117 + 16384 (reserved sectors)

Part      Tag    Flag     First Sector          Size          Last Sector
  0        usr    wm               256       558.90GB           1172107150
  1 unassigned    wm                 0            0                0
  2 unassigned    wm                 0            0                0
  3 unassigned    wm                 0            0                0
  4 unassigned    wm                 0            0                0
  5 unassigned    wm                 0            0                0
  6 unassigned    wm                 0            0                0
   8   reserved    wm        1172107151         8.00MB           1172123534

It mentioned that there are total of (a)1172107117 + (b)16384 = 1172123501 sectors (c)

Partition 8 = 1172107151 to 1172123534 = 16384 sectors which match (b)
Partition 0 = 256 to 1172107150 = 1172106895 sectors which dont match (a)
Code:
===========================

Addup the sectors in the 2 partitions
Code:
(1172106895+16384=1172123279)

which is <= to the total sectors (1172123501) (c)

If i say partition 0 = first sector 0 to 1172107150 which addup to 1172107151 sectors which is then even more then 1172107117 (a)

How it all adds-up ?
Where are all the missing or extra sectors ?

Regards,
Noob

Last edited by Neo; 01-17-2019 at 10:21 PM..
 

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SYSTEMD-EFI-BOOT-GENERATOR(8)				    systemd-efi-boot-generator				     SYSTEMD-EFI-BOOT-GENERATOR(8)

NAME
systemd-efi-boot-generator - Generator for automatically mounting the EFI System Partition used by the current boot to /boot SYNOPSIS
/usr/lib/systemd/system-generators/systemd-efi-boot-generator DESCRIPTION
systemd-efi-boot-generator is a generator that automatically creates mount and automount units for the EFI System Partition (ESP), mounting it to /boot. Note that this generator will execute no operation on non-EFI systems, on systems where the boot loader does not communicate the used ESP to the OS, on systems where /boot is an explicitly configured mount (for example, listed in fstab(5)) or where the /boot mount point is non-empty. Since this generator creates an automount unit, the mount will only be activated on-demand, when accessed. systemd-efi-boot-generator implements the generator specification[1]. SEE ALSO
systemd(1), systemd.mount(5), systemd.automount(5), systemd-gpt-auto-generator(8), gummiboot(8), fstab(5) NOTES
1. generator specification http://www.freedesktop.org/wiki/Software/systemd/Generators systemd 208 SYSTEMD-EFI-BOOT-GENERATOR(8)
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