ZFS - whole disk Vs slice Post: 302634965

9 More Discussions You Might Find Interesting

1. Solaris

mirroring the boot slice (slice 8) on x86

Hi there I am about to mirror a Solaris 10 x86 box (SunFire X4100) onto a secondary disk using svm (current system is one disk). My question is this, on X86 boxes there is a slice 8 defined as boot partition (and also a slice 9, dunno what its used for tho). Do I need to mirror this boot slice...

2. Solaris

zfs mirror disk

Is it possible to create a Mirror with zfs ?? I'm experimented user with Solstice Disk suite. Or Sun Volume manager or veritas volume manager. But, i would like switch from Disksuite to Zfs. All my mirrored disks.

3. Solaris

Ways to analyse root disk slice

Hi, Recently I faced with need of analyze root disk. I figured out two possible ways to do it: 1. Practical. Boot from CD and run format 2. Theoretical. Create live upgrade boot environment on another disk, activate it, reboot, unmont all root disk partitions and run format. I've already...

4. UNIX for Dummies Questions & Answers

Does formatting slice 2 (backup) destroy disk geometry?

I am a new Unix Sys Admin who is learning mostly from books with minimal classroom training (ie: no certificates, training is largely hands-on, conducted at work). I work with Solaris 8 through 10, and with some fairly outdated hardware. In my work restoring old workstations I have been instructed...

5. Shell Programming and Scripting

Looking for help with script to assign all disk space to slice#0 on multiple disks of varying sizes

Hi Folks, I am trying to make a script to assign all diskspace to slice 0, on multiple sized disks. Since the disks are new they may need to be labelled also to avoid the error: Cannot get disk geometry Below is my code struggling with logic which doesn't seem to be producing the desired...

6. Solaris

label a slice on disk erorr

Hi there, I am trying to do root volume mirroring on SunFire V210 server. I have two disks in it.First one is c1t0do and second one is c1t1do. Both disks already have partitions in them so I am deleting the partitions of second disk(c1t1do) using format command and selecting cylinder start 0...

7. Solaris

Trouble creating a disk partition slice (EFI)

Hi all, I am using SPARC Solaris 11.1 with EFI labelled disks. I am new to ZFS file systems and slightly stuck when trying to create a partition (slice) on one of my LUNs. EFI labels use sectors and blocks and I am not sure how exactly it works. From here I can try and create a...

8. Solaris

ZFS Slice disk

Hi, How to to make a slice and define as ufs from zpool? Please advice me. Thanks. ---------- Post updated at 01:53 AM ---------- Previous update was at 12:24 AM ---------- Before slice: Part Tag Flag Cylinders Size Blocks 0 root wm 0 ...

9. Solaris

Trying to create ZFS slice on rpool

I have a 240GB disk as rpool. I have installed Solaris 11.3 to a partition which is 110GB. Now I have another 130GB which is unallocated. I want to use that additional space as a temporary folder to be shared between Solaris and Linux. The additional space had no /dev/dsk/c2t4... entry so I used...

LEARN ABOUT FREEBSD

zfsboot

ZFSBOOT(8)						    BSD System Manager's Manual 						ZFSBOOT(8)

NAME

     zfsboot -- bootcode for ZFS on BIOS-based computers

DESCRIPTION

     zfsboot is used on BIOS-based computers to boot from a filesystem in a ZFS pool.  zfsboot is installed in two parts on a disk or a partition
     used by a ZFS pool.  The first part, a single-sector starter boot block, is installed at the beginning of the disk or partition.  The second
     part, a main boot block, is installed at a special offset within the disk or partition.  Both areas are reserved by the ZFS on-disk specifi-
     cation for boot use.  If zfsboot is installed in a partition, then that partition should be made bootable using appropriate configuration and
     boot blocks described in boot(8).

BOOTING

     The zfsboot boot process is very similar to that of gptzfsboot(8).  One significant difference is that zfsboot does not currently support the
     GPT partitioning scheme.  Thus only whole disks and MBR partitions, traditionally referred to as slices, are probed for ZFS disk labels.  See
     the BUGS section in gptzfsboot(8) for some limitations of the MBR scheme support.

USAGE

     zfsboot supports all the same prompt and configuration file arguments as gptzfsboot(8).

FILES

     /boot/zfsboot  boot code binary
     /boot.config   parameters for the boot block (optional)
     /boot/config   alternative parameters for the boot block (optional)

EXAMPLES

     zfsboot is typically installed using dd(1).  To install zfsboot on the ada0 drive:

	   dd if=/boot/zfsboot of=/dev/ada0 count=1
	   dd if=/boot/zfsboot of=/dev/ada0 iseek=1 oseek=1024

     If the drive is currently in use, the GEOM safety will prevent writes and must be disabled before running the above commands:

	   sysctl kern.geom.debugflags=0x10

     zfsboot can also be installed in an MBR slice:

	   gpart create -s mbr ada0
	   gpart add -t freebsd ada0
	   gpart create -s BSD ada0s1
	   gpart bootcode -b /boot/boot0 ada0
	   gpart set -a active -i 1 ada0
	   dd if=/boot/zfsboot of=/dev/ada0s1 count=1
	   dd if=/boot/zfsboot of=/dev/ada0s1 iseek=1 oseek=1024

     Note that commands to create and populate a pool are not shown in the example above.

SEE ALSO

     dd(1), boot.config(5), boot(8), gptzfsboot(8), loader(8), zfsloader(8), zpool(8)

HISTORY

     zfsboot appeared in FreeBSD 7.3.

AUTHORS

     This manual page was written by Andriy Gapon <avg@FreeBSD.org>.

BUGS

     Installing zfsboot with dd(1) is a hack.  ZFS needs a command to properly install zfsboot onto a ZFS-controlled disk or partition.

BSD
								September 15, 2014							       BSD