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Operating Systems Linux Ubuntu Linux LVM.. Grub not loading from replaced disk Post 302866095 by busyboy on Tuesday 22nd of October 2013 03:52:44 AM
Old 10-22-2013
hi,

Can you please suggest what that means to Populate the BIOS Partition. I'm not aware of this mechanism.

Regards,
Nasir

---------- Post updated Oct 22nd, 2013 at 01:52 PM ---------- Previous update was Oct 21st, 2013 at 06:37 PM ----------

Quote:
Originally Posted by fpmurphy
Assuming you are using GRUB2, pre-EFI firmware, i.e. a BIOS, and a GPT disk, do you see any sign of a BIOS Boot Partition Table? Partition type should be EF02.
Hi fpmurphy,


I have below given output from the gdisk command for the disk being replaced here.. both replaced and the good disk ( the disk which replicated its data to replaced one )



Code:
Disk /dev/sda: 5860533168 sectors, 2.7 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 5B747213-253B-4BCD-9022-AC20F6A3EB6C
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 5860533134
Partitions will be aligned on 2048-sector boundaries
Total free space is 2925 sectors (1.4 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048            4095   1024.0 KiB  EF02  
   2            4096        39065599   18.6 GiB    FD00  
   3        39065600      1015627775   465.7 GiB   FD00  
   4      1015627776      5860532223   2.3 TiB     FD00  

Command (? for help): i
Partition number (1-4): 1
Partition GUID code: 21686148-6449-6E6F-744E-656564454649 (BIOS boot partition)
Partition unique GUID: 2B25F37D-4DCC-4D62-842A-322176A30AD9
First sector: 2048 (at 1024.0 KiB)
Last sector: 4095 (at 2.0 MiB)
Partition size: 2048 sectors (1024.0 KiB)
Attribute flags: 0000000000000000
Partition name: ' '



and below is the output for the disk ( which is intact till now and I replicated this disk to /dev/sda above )


Code:
Disk /dev/sdb: 5860533168 sectors, 2.7 TiB
Logical sector size: 512 bytes
Disk identifier (GUID): 52E97A2C-D5CE-4FBE-8853-9A17F86DC779
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 5860533134
Partitions will be aligned on 2048-sector boundaries
Total free space is 2925 sectors (1.4 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048            4095   1024.0 KiB  EF02
   2            4096        39065599   18.6 GiB    FD00
   3        39065600      1015627775   465.7 GiB   FD00
   4      1015627776      5860532223   2.3 TiB     FD00

Command (? for help): i
Partition number (1-4): 1
Partition GUID code: 21686148-6449-6E6F-744E-656564454649 (BIOS boot partition)
Partition unique GUID: 95307A72-04D0-48A8-B676-FD04F74E1F62
First sector: 2048 (at 1024.0 KiB)
Last sector: 4095 (at 2.0 MiB)
Partition size: 2048 sectors (1024.0 KiB)
Attribute flags: 0000000000000000
Partition name: ' '

 

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PVCK(8) 						      System Manager's Manual							   PVCK(8)

NAME
pvck - check physical volume metadata SYNOPSIS
pvck [-d|--debug] [-h|--help] [-v|--verbose] [--labelsector] PhysicalVolume [PhysicalVolume...] DESCRIPTION
pvck checks physical volume LVM metadata for consistency. OPTIONS
See lvm for common options. --labelsector sector By default, 4 sectors of PhysicalVolume are scanned for an LVM label, starting at sector 0. This parameter allows you to specify a different starting sector for the scan and is useful for recovery situations. For example, suppose the partition table is corrupted or lost on /dev/sda, but you suspect there was an LVM partition at approximately 100 MB. This area of the disk may be scanned by using the --labelsector parameter with a value of 204800 (100 * 1024 * 1024 / 512 = 204800): pvck --labelsector 204800 /dev/sda Note that a script can be used with --labelsector to automate the process of finding LVM labels. SEE ALSO
lvm(8), pvcreate(8), pvscan(8) vgck(8) Sistina Software UK LVM TOOLS 2.02.67(2) (2010-06-04) PVCK(8)
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