need help with RAID1 EFI GPT disks

[George Toft]

installed gdisk and it looks like /dev/sdb is damaged, but /dev/sdc is 
good :)  doing a dd on the whole drive to a file on another drive so I 
have a backup.  I'll check back in a couple days when it's done.

Regards,

George Toft

On 2/2/2014 2:58 PM, Matt Graham wrote:
>>> # fdisk -l | egrep "GPT|dev"
>>> WARNING: fdisk doesn't support GPT.
>>> /dev/sdb1 1 267350 2147483647+ ee GPT
>
>>> # mdadm --assemble --run /dev/md0 /dev/sdb1
>>> mdadm: cannot open device /dev/sdb1: No such
>>> file or directory
>
> This is an odd message to get, and probably means that udev didn't 
> find the device and create it because udev and/or the rescue system's 
> GPT support is flaking out.  Does the kernel in this rescue system 
> support GPT?  "mknod /dev/sdb1 b 8 17" to create it.  You may wish to 
> "mknod /dev/sdc1 8 33" in case the other softRAID-1 disk has better 
> stuff on it.
>
> As other people have said, there should be no need to use mdadm to 
> assemble an array out of RAID-1 partitions.  "mount /dev/sdb1 
> /mnt/somewhere" should do something useful if the device node and 
> /mnt/somewhere exist.
>
> On 2014-02-02 12:57, Michael Butash wrote:
>> Use gdisk if/when doing gpt
>
> That too.  (One day, we will forsake our filesystems and break all 
> bonds of block devices to get a disk larger than 2T for actual 
> experience with GPT, but today is *not* this day.  This day, we *SOLVE 
> TECH PROBLEMS!!!1!*)
>