WARNING: GPT (GUID Partition Table) detected on '/dev/sda'!

[Harpz]

Hi

Came across this in my log and wondering if i did something wrong when pre-clearing and installing my new 3TB parity drive?

 

Feb 10 06:27:59 Pluto unmenu[1132]: WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted

 

Should i be worried, Is my array safe and protected?

 

Using unRAID Version: 5.0-rc8a

[mbryanr]

Was this drive in any other system prior to installation?

 

Follow Limetech's instruction and assessment here:

http://lime-technology.com/forum/index.php?topic=13371.msg127457#msg127457

 

 

EDIT: I should add, when unRaid writes a MBR partition table, it does not touch the sectors between the MBR and the start of partition 1 - it leaves them as-is, so if sometime in the past a GPT was written to the disk, that GPT header will still exist in sector 1.

 

Ditto when writing a GPT - the sectors between the end of the GPT partition table and the start of partition 1 are not written.

 

EDIT 2: To add to what I added - even if there is a remnant GPT header in sector 1, but the MBR is "valid", then the rest of linux OS does the right thing: interprets the MBR partition table.  In order for linux to interpret a GPT, the MBR must be in the format of a so-called "protective MBR" as documented in the wikipedia article.

 

 

Edit:  Looks like nothing to worry about:

http://lime-technology.com/forum/index.php?topic=14158.msg134828#msg134828

http://lime-technology.com/forum/index.php?topic=19275.msg171839#msg171839

 

Edit2:  I probably wouldn't do this for a harmless error message, but it does describe why it occurs..

http://www.rodsbooks.com/gdisk/wipegpt.html

 

[lionelhutz]

The short answer is that 3T drives use GPT so of course a GPT partition will be detected. Nothing to worry about.