For months I have been happily using my 3TB hard drive, and I still do. Today I discovered that GParted shows the whole drive (/dev/sdb) as being unallocated. The drive works fine though. Clicking for more information in GParted gives me the following warning text:
The backup GPT table is not at the end of the disk, as it should be. This might mean that another operating system believes the disk is smaller. Fix, by moving the backup to the end (and removing the old backup)?
Not all of the space available to /dev/sdb appears to be used, you can fix the GPT to use all of the space (an extra 4294967296 blocks) or continue with the current setting?
Unable to satisfy all constraints on the partition.
On the drive sits one single ext4 partition, filling up presumably the whole drive. I was the one formatting it a long time ago, using GParted, if I remember correctly. I can't remember details of creating a GPT table. The drive is used only for data and does not contain system files or anything. I do mount it automatically with fstab.
In GParted I only have the option of clicking Close. See attached screenshots. I'm not happy to have GParted telling me the drive is unallocated space. What can/should I do to fix this?
The problem I have with experimenting is that I have no other drive that can accommodate my 3TB worth of data, so making backups is an issue. (Before you tell me that I should always backup data, most of the contents on this 3TB drive is my incremental backups from other drives, so I prefer not to lose it.)
sudo gdisk -l /dev/sdb
GPT fdisk (gdisk) version 0.8.1 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Warning! Secondary partition table overlaps the last partition by 4294966385 blocks! Try reducing the partition table size by 17179865540 entries. (Use the 's' item on the experts' menu.) Disk /dev/sdb: 5860533168 sectors, 2.7 TiB Logical sector size: 512 bytes Disk identifier (GUID): 04F5DE37-A757-414B-A3E0-F845BD54B767 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1565565838 Partitions will be aligned on 2048-sector boundaries Total free space is 2014 sectors (1007.0 KiB) Number Start (sector) End (sector) Size Code Name 1 2048 5860532223 2.7 TiB 0700