February 10, 201313 yr 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
February 10, 201313 yr 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
February 10, 201313 yr The short answer is that 3T drives use GPT so of course a GPT partition will be detected. Nothing to worry about.
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