EFI disk labeling / understand the parition table / sectors not continue
Hi all,
I have a EFI disk and it is use in zfs pool.
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)
Addup the sectors in the 2 partitions
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 ?
First post :) ...
Here is a script for automatic labeling of previously unlabeled disks.
Other methods exist (format -f cmd_file), but I like this because it's all in one place.
#!/bin/ksh
#----------------------
# format_label
# Automatic labeling of previously unlabeled disks
#... (1 Reply)
Is there a way to determine the number of available spare sectors on a disk ? as it may be useful for notifying a user to take a backup of the disk before it runs into a medium error. (6 Replies)
Hello, I need advice on how to check if started processes are finished in perl, here's explanation :
OS is RHEL 4, perl -v = "This is perl, v5.8.0 built for i386-linux-thread-multi"
The logic of the script :
#!/usr/bin/perl
use warnings;
$param1 = $ARGV;
$param2 = $ARGV;
$param3 =... (2 Replies)
I found a document: Bad block HOWTO for smartmontools
My hard drive is Maxtor:
root]# fdisk -lu /dev/hda
Disk /dev/hda: 81.9 GB, 81964302336 bytes
255 heads, 63 sectors/track, 9964 cylinders, total 160086528 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x3f4e3f4d
... (0 Replies)
Hi all,
I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it... (23 Replies)
i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
$ cat boot.S
.code16
#define SETUPLEN 4... (0 Replies)
i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
$ cat boot.S
.code16
#define SETUPLEN 4... (0 Replies)
i'm writing some code to simulate the boot progress after power on
but when i try to read the 2nd sector from a floppy disk, this operation always fail with ah=0x80h which means timeout, how can i get over this problem?
my code would be like this:
$ cat boot.S
.code16
#define SETUPLEN 4... (0 Replies)
Discussion started by: wljackhero
0 Replies
LEARN ABOUT FREEBSD
uefi
UEFI(8) BSD System Manager's Manual UEFI(8)NAME
UEFI -- Unified Extensible Firmware Interface bootstrapping procedures
DESCRIPTION
The UEFI Unified Extensible Firmware Interface provides boot- and run-time services to operating systems. UEFI is a replacement for the
legacy BIOS on the i386 and amd64 CPU architectures, and is also used on arm64 and ia64.
The UEFI boot process loads system bootstrap code located in an EFI System Partition (ESP). The ESP is a GPT or MBR partition with a spe-
cific identifier that contains an msdosfs(5) FAT file system with a specified file hierarchy.
Partition Scheme ESP Identifier
GPT C12A7328-F81F-11D2-BA4B-00A0C93EC93B
MBR 0xEF
The UEFI boot process proceeds as follows:
1. UEFI firmware runs at power up and searches for an OS loader in the EFI system partition. The path to the loader may be set by an
EFI environment variable. If not set, the default is /EFI/BOOT/BOOTX64.EFI. The default UEFI boot configuration for FreeBSD
installs boot1.efi as /EFI/BOOT/BOOTX64.EFI.
2. boot1.efi locates the first partition with the type freebsd-ufs, and from it loads loader.efi.
3. loader.efi loads and boots the kernel, as described in loader(8).
The vt(4) system console is automatically selected when booting via UEFI.
FILES
/boot/boot1.efi
First stage UEFI bootstrap
/boot/boot1.efifat
msdosfs(5) FAT file system image containing boot1.efi for use by bsdinstall(8) and the bootcode argument to gpart(8).
/boot/loader.efi
Final stage bootstrap
/boot/kernel/kernel
default kernel
/boot/kernel.old/kernel
typical non-default kernel (optional)
SEE ALSO vt(4), msdosfs(5), boot(8), gpart(8)HISTORY
UEFI boot support first appeared in FreeBSD 10.1.
AUTHORS
UEFI boot support was developed by Benno Rice <benno@FreeBSD.org>, Ed Maste <emaste@FreeBSD.org>, and Nathan Whitehorn
<nwhitehorn@FreeBSD.org>. The FreeBSD Foundation sponsored portions of the work.
CAVEATS
EFI environment variables are not supported by loader(8) or the kernel.
boot1.efi loads loader.efi from the first FreeBSD-UFS file system it locates, even if it is on a different disk.
boot1.efi cannot load loader.efi from a ZFS(8) file system. As a result, UEFI does not support a typical root file system on ZFS configura-
tion.
BSD October 17, 2014 BSD