Trouble creating a disk partition slice (EFI) Post: 302938891

Sponsored Content

Operating Systems Solaris Trouble creating a disk partition slice (EFI) Post 302938891 by selectstar on Thursday 19th of March 2015 07:04:23 PM

03-19-2015

Registered User

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 partition but when I have to enter the Starting Sector, I get confused, as you can see from the below code.

I have tried to understand the sectors and so on, but cannot work out what sector I need to create from.

Any help would be greatly appreciated and/or info on sectors.

Code:

root@odb-grumpy:/# format
Searching for disks...done


AVAILABLE DISK SELECTIONS:
       0. c2d1 <NETAPP-LUN-820a-40.00GB>
          /virtual-devices@100/channel-devices@200/disk@1
       1. c2d2 <NETAPP-LUN-820a-20.00GB>
          /virtual-devices@100/channel-devices@200/disk@2
       2. c2d3 <NETAPP-LUN-820a-500.00MB>
          /virtual-devices@100/channel-devices@200/disk@3
Specify disk (enter its number): 2
selecting c2d3
[disk formatted]


FORMAT MENU:
        disk       - select a disk
        type       - select (define) a disk type
        partition  - select (define) a partition table
        current    - describe the current disk
        format     - format and analyze the disk
        repair     - repair a defective sector
        label      - write label to the disk
        analyze    - surface analysis
        defect     - defect list management
        backup     - search for backup labels
        verify     - read and display labels
        inquiry    - show disk ID
        volname    - set 8-character volume name
        !<cmd>     - execute <cmd>, then return
        quit
format> p


PARTITION MENU:
        0      - change `0' partition
        1      - change `1' partition
        2      - change `2' partition
        3      - change `3' partition
        4      - change `4' partition
        5      - change `5' partition
        6      - change `6' partition
        select - select a predefined table
        modify - modify a predefined partition table
        name   - name the current table
        print  - display the current table
        label  - write partition map and label to the disk
        !<cmd> - execute <cmd>, then return
        quit
partition> p
Current partition table (original):
Total disk sectors available: 1007549 + 16384 (reserved sectors)

Part      Tag    Flag     First Sector       Size       Last Sector
  0        usr    wm               256    491.86MB        1007582
  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           1007583      8.00MB        1023966

partition> 1
Part      Tag    Flag     First Sector       Size       Last Sector
  1 unassigned    wm                 0         0             0

Enter partition id tag[usr]:
Enter partition permission flags[wm]:
Enter new starting sector[1007583]:

selectstar

View Public Profile for selectstar

Find all posts by selectstar

7 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

slice & partition???

:confused: Hello, What is the difference between slice and partition on Solaris world? Regards

2. Solaris

EFI Disk labels on 3510 raid array

Hi Peeps, Can anyone help me an EFI lablel on a 3510 raid array that I cannot get rid of, format -e and label just asks you if you want to label it. Want an SMI label writing to it. Anyone got any ideas on how to remove the EFI label? Thanks in advance Martin

3. Solaris

Installing using ZFS - need to remove EFI disk labels

What is the preferred way of doing this from a bare metal install?

4. Solaris

ZFS - whole disk Vs slice

we have a ZFS file system that was created as a pool of just one disk (raid on a SAN) when this was created it was done as a whole disk, and so EFI label. now we want to mount this file system into an LDOM. my understanding of how ldom's and disk works this is that we can only do this as a...

5. Solaris

Partition overlaps another partition while creating new parition in solaris

hi all while formatting hard disk i am getting following error. Partition 1 ends at 266338338 It must be between 34 and 143374704. label error: EFI Labels do not support overlapping partitions Partition 8 overlaps partition 1. Warning: error writing EFI. Label failed. I have formatted the...

6. BSD

Find Partition/Slice UUID

I thought I had figured this out at one point, but I can't remember. Is there a way/command to get the UUIDs of a disk's partitions/slices in FreeBSD? Linux has the blkid command, which doesn't seem to be available.

7. Solaris

EFI disk labeling / understand the parition table / sectors not continue

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

LEARN ABOUT DEBIAN

scrounge-ntfs

scrounge-ntfs(8)					    BSD System Manager's Manual 					  scrounge-ntfs(8)

NAME

     scrounge-ntfs -- helps retrieve data from corrupted NTFS partitions

SYNOPSIS

     scrounge-ntfs -l disk
     scrounge-ntfs -s disk
     scrounge-ntfs [-m mftoffset] [-c clustersize] [-o outdir] disk start end

DESCRIPTION

     scrounge-ntfs is a utility that can rescue data from corrupted NTFS partitions. It writes the files retrieved to another working file system.
     Certain information about the partition needs to be known in advance.

     The -l mode is meant to be run in advance of the data corruption, with the output stored away in a file. This allows scrounge-ntfs to recover
     data reliably. See the 'NOTES' section below for recover info when this isn't the case.

OPTIONS

     The options are as follows:

     -c 	 The cluster size (in sectors). When not specified a default of 8 is used.

     -l 	 List partition information for a drive. This will only work when the partition table for the given drive is intact.

     -m 	 When recovering data this specifies the location of the MFT from the beginning of the partition (in sectors). If not specified
		 then no directory information can be used, that is, all rescued files will be written to the same directory.

     -o 	 Directory to put rescued files in. If not specified then files will be placed in the current directory.

     -s 	 Search disk for partition information. (Not implemented yet).

     disk	 The raw device used to access the disk which contains the NTFS partition to rescue files from. eg: '/dev/hdc'

     start	 The beginning of the NTFS partition (in sectors).

     end	 The end of the NTFS partition (in sectors)

NOTES

     If you plan on using this program sucessfully you should prepare in advance by storing a copy of the partition information. Use the -l option
     to do this. Eventually searching for disk partition information will be implemented, which will solve this problem.

     When only one partition exists on a disk or you want to rescue the first partition there are ways to guess at the sector sizes and MFT loca-
     tion. See the scrounge-ntfs web page for more info:

     http://memberwebs.com/swalter/software/scrounge/

AUTHOR

     Stef Walter <stef@memberwebs.com>

scrounge-ntfs							   June 1, 2019 						     scrounge-ntfs