[Cialug] Help with Understanding Drives

[Charles Dunbar]

Looks like the nvme is for a Windows install and /dev/sda was used for
Linux.  Could probably dual boot into Windows if grub is configured to find
it.

You can tell that you have two disks because the rightmost column of lsblk
says "disk" for sda and nvme0n1

Charles

On Thu, Sep 27, 2018 at 3:25 PM David Champion <dchamp1337 at gmail.com> wrote:

> nvme is a type of ssd drive.
>
> -dc
>
>
> On Thu, Sep 27, 2018 at 3:19 PM Todd Walton <tdwalton at gmail.com> wrote:
>
> > Hey all,
> >
> > I have a laptop with Ubuntu 16.04 on it that I know has one or more
> disks,
> > one or more of which might be SSD, and that the root and/or home
> partitions
> > are LUKS encrypted. I want to reinstall Linux on this laptop but I want
> to
> > save the user data on it, so I'm trying to figure out how to shuffle all
> > this around.
> >
> > Using fdisk tells me there are two drives, "sda" and "nvme0n1". An lsblk
> > shows those two drives as well. I haven't seen "nvme" drives before, so
> I'm
> > not familiar with how Linux handles them.
> >
> > Could the nvme drive be just the encrypted filesystem on top of the sda
> > partitions? How do I tell if those two are truly two different physical
> > disks or not? If the nvme is truly a separate physical disk, how could it
> > be that whoever set up this laptop wouldn't have used it at all? (I don't
> > see it being mapped to any filesystems.) The two have slightly different
> > sizes, so maybe they really are two physical disks. I don't know what's
> up
> > with all that "Microsoft" this-and-that. If it's a recovery drive that
> came
> > built into the laptop surely it wouldn't be 238 freakin' gigs.
> >
> > ===================================
> >
> > @ ~> sudo fdisk -l
> >
> > Disk /dev/nvme0n1: 238.5 GiB, 256060514304 bytes, 500118192 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
> > Disklabel type: gpt
> > Disk identifier: F97E0C07-C73B-41D7-8CEC-57EDFB9C366C
> >
> > Device             Start       End   Sectors   Size Type
> > /dev/nvme0n1p1      2048    534527    532480   260M EFI System
> > /dev/nvme0n1p2    534528    567295     32768    16M Microsoft reserved
> > /dev/nvme0n1p3    567296 498069503 497502208 237.2G Microsoft basic data
> > /dev/nvme0n1p4 498069504 500117503   2048000  1000M Windows recovery
> > environment
> >
> > Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 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
> > Disklabel type: dos
> > Disk identifier: 0x522a56e1
> >
> > Device     Boot   Start       End   Sectors   Size Id Type
> > /dev/sda1  *       2048    999423    997376   487M 83 Linux
> > /dev/sda2       1001470 468860927 467859458 223.1G  5 Extended
> > /dev/sda5       1001472 468860927 467859456 223.1G 83 Linux
> >
> > Disk /dev/mapper/sda5_crypt: 223.1 GiB, 239541944320 bytes, 467855360
> > 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 /dev/mapper/ubuntu--vg-root: 215.6 GiB, 231487832064 bytes,
> 452124672
> > 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 /dev/mapper/ubuntu--vg-swap_1: 7.5 GiB, 8006926336 bytes, 15638528
> > 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
> >
> > ===================================
> >
> > @ ~> lsblk
> >
> > NAME                    MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
> > sda                       8:0    0 232.9G  0 disk
> > ├─sda5                    8:5    0 223.1G  0 part
> > │ └─sda5_crypt          253:0    0 223.1G  0 crypt
> > │   ├─ubuntu--vg-root   253:1    0 215.6G  0 lvm   /
> > │   └─ubuntu--vg-swap_1 253:2    0   7.5G  0 lvm   [SWAP]
> > └─sda1                    8:1    0   487M  0 part  /boot
> > nvme0n1                 259:0    0 238.5G  0 disk
> > ├─nvme0n1p3             259:7    0 237.2G  0 part
> > ├─nvme0n1p1             259:5    0   260M  0 part
> > ├─nvme0n1p4             259:8    0  1000M  0 part
> > └─nvme0n1p2             259:6    0    16M  0 part
> >
> > ===================================
> >
> > Help?
> >
> > --
> > Todd
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> >
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