The MBR (Master Boot Record) resides on the first sector of the disk and is where control is passed to by the machine BIOS.
The MBR will be different from operating system to operating system, and each operating system will have a way of writing its own MBR.
For example, in Windows
(google that for syntax) will write an MBR and on Solaris the
command will write an MBR.
If an MBR exists at all when the disk comes from the factory, that will just be from the manufacturing test process and probably won't be what you need for your O/S. When the O/S install routine runs it will install its MBR.
Will some one tell me what this means.
"warning: ida 0 <slot 6> : command timed out on dev 1/42 blk 4824290 logical unit=0 blocks=5512102, size 2, cmd=0x20."
I'm running SCO 505 on a proliant 1600r.
Thnank you in advance. (3 Replies)
I need to make it possible to automatically copy files from an external usb hard drive to a directory when i plug it in....if you can point me in the right direction, i would be very grateful....thanks a lot. :confused: (0 Replies)
I am using an Acer Aspire 4720Z with two partitions C and D. Windows is installed on C and I decided to install Red Hat Linux 9 in partition D. The two partitions are in NTFS file system. During my installation of the the Linux, a prompt was displayed on screen with the message: "No hard drives... (2 Replies)
Version: solaris 10 x86
I just got a western digital external harddrive formated with fat 32. this drive came with some setup files which is meant for windows or mac.
I want to reformat and partition this drive into two ( for solaris and windows) such that the setup files will still be there... (2 Replies)
Folks;
I just added 2 physical new hard drives to my SUSE server. My server is already running SUSE 10.3 version.
Is there a command i can use to add the new space or even see if the system can sees them? (3 Replies)
Looking for some clues on how to set my internal hard drives inaccessible/busy to clonezilla. Noprobe doesn't work in startup and the drive is still found.
I know I can find all hard drives using the following:
sudo fdisk -l | grep GB | awk '{print $2}' | grep -Po "^+(?=:?)"
I tried... (9 Replies)
I have a T2000 Sun-Fire server. I have 2 sets of drives in a raid 1. Lets call them Set A and Set B. I had Set A installed and working. I needed a new install so I so build up Set B. After some time I wanted to put Set A back in the server. Now the system will not boot off of Set A. I tried to boot... (7 Replies)
I have three Sun Oracle Netra T5220s. I am trying to just get the processor information psrinfo or prtdiag -v from the # prompt in single user mode.
I am needing to know the commands to get to boot the CD/DVD of the Solaris OS. I am using it via Serial Port Management.
Tinkering around I... (4 Replies)
Hi,
I have two SCSI Hard Drives in a Sun Solaris 8 server as shown below. I would like to access Disk1 and look at its contents, directory structure and files. How do I change my default directory from Disk 0 to Disk 1 and vice versa?
Thank you. (5 Replies)
Ok so i thought i was smart but i can tell I need some help. I am playing around with understanding lvm and adding disks to a linux box. I added a disk and then ran what i thought were commands to add this disk to the box but I think I messed up and would like some help. My question is did i... (5 Replies)
Discussion started by: cptkirkh
5 Replies
LEARN ABOUT FREEBSD
gptzfsboot
GPTZFSBOOT(8) BSD System Manager's Manual GPTZFSBOOT(8)NAME
gptzfsboot -- GPT bootcode for ZFS on BIOS-based computers
DESCRIPTION
gptzfsboot is used on BIOS-based computers to boot from a filesystem in a ZFS pool. gptzfsboot is installed in a freebsd-boot partition of a
GPT-partitioned disk with gpart(8).
IMPLEMENTATION NOTES
The GPT standard allows a variable number of partitions, but gptzfsboot only boots from tables with 128 partitions or less.
BOOTING
gptzfsboot tries to find all ZFS pools that are composed of BIOS-visible hard disks or partitions on them. gptzfsboot looks for ZFS device
labels on all visible disks and in discovered supported partitions for all supported partition scheme types. The search starts with the disk
from which gptzfsboot itself was loaded. Other disks are probed in BIOS defined order. After a disk is probed and gptzfsboot determines
that the whole disk is not a ZFS pool member, the individual partitions are probed in their partition table order. Currently GPT and MBR
partition schemes are supported. With the GPT scheme, only partitions of type freebsd-zfs are probed. The first pool seen during probing is
used as a default boot pool.
The filesystem specified by the bootfs property of the pool is used as a default boot filesystem. If the bootfs property is not set, then
the root filesystem of the pool is used as the default. zfsloader(8) is loaded from the boot filesystem. If /boot.config or /boot/config is
present in the boot filesystem, boot options are read from it in the same way as boot(8).
The ZFS GUIDs of the first successfully probed device and the first detected pool are made available to zfsloader(8) in the
vfs.zfs.boot.primary_vdev and vfs.zfs.boot.primary_pool variables.
USAGE
Normally gptzfsboot will boot in fully automatic mode. However, like boot(8), it is possible to interrupt the automatic boot process and
interact with gptzfsboot through a prompt. gptzfsboot accepts all the options that boot(8) supports.
The filesystem specification and the path to zfsloader(8) are different from boot(8). The format is
[zfs:pool/filesystem:][/path/to/loader]
Both the filesystem and the path can be specified. If only a path is specified, then the default filesystem is used. If only a pool and
filesystem are specified, then /boot/zfsloader is used as a path.
Additionally, the status command can be used to query information about discovered pools. The output format is similar to that of zpool
status (see zpool(8)).
The configured or automatically determined ZFS boot filesystem is stored in the zfsloader(8) loaddev variable, and also set as the initial
value of the currdev variable.
FILES
/boot/gptzfsboot boot code binary
/boot.config parameters for the boot block (optional)
/boot/config alternative parameters for the boot block (optional)
EXAMPLES
gptzfsboot is typically installed in combination with a ``protective MBR'' (see gpart(8)). To install gptzfsboot on the ada0 drive:
gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
gptzfsboot can also be installed without the PMBR:
gpart bootcode -p /boot/gptzfsboot -i 1 ada0
SEE ALSO boot.config(5), boot(8), gpart(8), loader(8), zfsloader(8), zpool(8)HISTORY
gptzfsboot appeared in FreeBSD 7.3.
AUTHORS
This manual page was written by Andriy Gapon <avg@FreeBSD.org>.
BUGS
gptzfsboot looks for ZFS meta-data only in MBR partitions (known on FreeBSD as slices). It does not look into BSD disklabel(8) partitions
that are traditionally called partitions. If a disklabel partition happens to be placed so that ZFS meta-data can be found at the fixed off-
sets relative to a slice, then gptzfsboot will recognize the partition as a part of a ZFS pool, but this is not guaranteed to happen.
BSD September 15, 2014 BSD