Setting up seagate 8TB luks one partition

aantoonio · 06-11-2017, 05:17 PM

Thought I make a new thread for this
1. Using "GParted 0.18.0" to delete all partitions and exit the program

2. Now use "gnome-disk-utility 3.10.0-1ubuntu3" to crate one luks partition. I use "encrypted, compatible with most systems (LUKS + Ext4)"
Done, all seems well but it is not.

A lot of disk activity

Code:

4461 be/4 root        0.00 B/s    0.00 B/s  0.00 %  1.95 % [ext4lazyinit]
 4754 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.07 % [kworker/u8:7]
   66 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.03 % [kworker/u8:2]
 4920 be/4 root        0.00 B/s    0.00 B/s  0.00 %  0.00 % udisksd --no-debug [pool]

Even when unmounted!

fdisk -l /dev/sdb

Code:

WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdb: 8001.6 GB, 8001563221504 bytes
255 heads, 63 sectors/track, 972801 cylinders, total 15628053167 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 33553920 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1  4294967295  2147483647+  ee  GPT
Partition 1 does not start on physical sector boundary.

smartctl -i /dev/sdb -d sat

Code:

smartctl 6.2 2013-07-26 r3841 [i686-linux-4.4.0-78-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     ST8000AS0002-1NA17Z
Serial Number:    Z840A0D2
LU WWN Device Id: 5 000c50 0873291d7
Firmware Version: AR15
User Capacity:    8,001,563,222,016 bytes [8.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    5980 rpm
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Mon Jun 12 00:11:38 2017 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

What to do?

Anton

Oh yea, forgot to mention, if I reboot, the disk shows (by hearing) the same activity "before I even give password for crypt luks to unlock my system. How can that be possible??? If I was on windows now i would think virus.

rknichols · 06-11-2017, 06:24 PM

Read and heed that warning in the first line from fdisk. On disks with GPT partitioning (which is required for disks larger than 2TB) you cannot use that tool, or at least the the version that you have. (Very recent versions of fdisk can handle GPT). As suggested, use gparted (or gdisk, if you have it) to examine the partitioning.

As for the disk activity, by any chance do you have another LUKS volume on the system that uses the same passphrase? Some init scripts will try any passphrase you give on all LUKS volumes that are found. The disk activity would then be the ext4 filesystem code in the kernel completing the lazy setup of the filesystem.

aantoonio · 06-11-2017, 11:38 PM

From gparted

https://pasteboard.co/hvYEFMon8.png
and
https://pasteboard.co/hvXq39g8e.png

Quote:

As for the disk activity, by any chance do you have another LUKS volume on the system that uses the same passphrase?

No I don't. Only my system drive, also luks but differed pass.

rknichols · 06-12-2017, 09:14 AM

Quote:

Originally Posted by aantoonio

From gparted

https://pasteboard.co/hvYEFMon8.png

That looks fine. What's the issue? gparted cannot, and should not be expected to, do anything with the content of an encrypted device or partition.