WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'!
bad?
I have a WD Red 3TB in the NAS and just connected a 1TB drive via usb3.0, I want to use this one for backup. Errors on filesystems makes it feel unreliable.
Here's my fdisk list
root@nasischijf:/# fdisk -l
Disk /dev/mtdblock0: 1 MB, 1572864 bytes 255 heads, 63 sectors/track, 0 cylinders, total 3072 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xf7ff1c18
Disk /dev/mtdblock0 doesn't contain a valid partition table
Disk /dev/mtdblock1: 0 MB, 131072 bytes 255 heads, 63 sectors/track, 0 cylinders, total 256 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x322e3535
Disk /dev/mtdblock1 doesn't contain a valid partition table
Disk /dev/mtdblock2: 6 MB, 6291456 bytes 255 heads, 63 sectors/track, 0 cylinders, total 12288 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe1a0f004
Disk /dev/mtdblock2 doesn't contain a valid partition table
Disk /dev/mtdblock3: 4 MB, 4194304 bytes 255 heads, 63 sectors/track, 0 cylinders, total 8192 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xfca4bafb
Disk /dev/mtdblock3 doesn't contain a valid partition table
Disk /dev/mtdblock4: 121 MB, 121634816 bytes 255 heads, 63 sectors/track, 14 cylinders, total 237568 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Disk /dev/mtdblock4 doesn't contain a valid partition table
WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sda: 3000.6 GB, 3000592982016 bytes 256 heads, 63 sectors/track, 363376 cylinders, total 5860533168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000
Device Boot Start End Blocks Id System /dev/sda1 1 4294967295 2147483647+ ee GPT Partition 1 does not start on physical sector boundary.
Disk /dev/md0: 4290 MB, 4290772992 bytes 2 heads, 4 sectors/track, 1047552 cylinders, total 8380416 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1: 536 MB, 536281088 bytes 2 heads, 4 sectors/track, 130928 cylinders, total 1047424 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000
Disk /dev/md1 doesn't contain a valid partition table
Disk /dev/md127: 2995.6 GB, 2995624738816 bytes 2 heads, 4 sectors/track, 731353696 cylinders, total 5850829568 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000
Disk /dev/md127 doesn't contain a valid partition table
WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
Device Boot Start End Blocks Id System /dev/sdb1 1 1953525167 976762583+ ee GPT
With disks that use the GPT partitioning scheme you need to use sgdisk not fdisk to print the partition table. fdisk only supports the MBR partitioning scheme. For disks larger than 2TB in capacity the GPT partitioning scheme is needed. For your internal and external disks run these commands:
With disks that use the GPT partitioning scheme you need to use sgdisk not fdisk to print the partition table. fdisk only supports the MBR partitioning scheme. For disks larger than 2TB in capacity the GPT partitioning scheme is needed. For your internal and external disks run these commands:
# sgdisk -p /dev/sda # sgdisk -p /dev/sdb
Aaah okay, so there's nothing to worry about, the only point is that fdisk is not equipped to correctly show the information. Thanks!
