Differences

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--- linux:storage [2019-04-30 13:46] – created gabriel
+++ linux:storage [2019-08-10 19:04] (current) – title capitalization gabriel
@@ Line 1: / Line 1: @@
-====== Linux Storage ======
+====== Linux storage ======
 This page contains my personal notes on Linux filesystems, partitioning, backups, performance tuning, and related concepts.  **Warning:** //these notes are specific to my own non-critical systems and may not be applicable in general use cases.//
+> **Update:** Due to a a number of stability issues I've returned to using [[https://neon.kde.org/|KDE neon]] on my work laptop.  Nod to the KDE devs for maintaining a stable rolling release distro.  The general principles still apply to any modern distro.
 ===== Partitioning for Ubuntu 19.04 workstations =====
@@ Line 8: / Line 10: @@
   * 256GB NVMe drive
+  * 256MiB EFI partition as a raw FAT partition
   * 512MiB /boot partition as a raw ext4 partition
-  * 512MiB EFI partition as a raw FAT partition
   * the rest of the disk is configured as an LVM PV consuming 92% of the drive
   * this currently contains one volume group with two logical volumes, 16GiB for swap (to allow hibernate) and the remaining space is used for /
@@ Line 22: / Line 24: @@
 mklabel gpt
 unit MiB # use binary format units when partitioning
-mkpart efi fat32 1MiB 513MiB # align the first block
+mkpart efi fat32 1MiB 257MiB # align the first block
-mkpart boot ext4 513MiB 1025MiB
+mkpart boot ext4 257MiB 769MiB
-mkpart pv0 ext4 1025MiB 92% # finish the LVM pv at 92% capacity
+mkpart lvm-pv0 ext4 769MiB 92% # finish the LVM pv at 92% capacity
 </file>
@@ Line 32: / Line 34: @@
 (parted) print
 Model: PC401 NVMe SK hynix 256GB (nvme)
-Disk /dev/nvme0n1: 244198MiB
+Disk /dev/nvme0n1: 256GB
 Sector size (logical/physical): 512B/512B
 Partition Table: gpt
 Disk Flags:
-Number  Start    End        Size       File system  Name  Flags
+Number  Start   End    Size   File system  Name     Flags
-      1.00MiB  513MiB     512MiB     fat32        efi
+      1049kB  269MB  268MB  ext4         efi      msftdata
-      513MiB   1025MiB    512MiB     ext4         boot
+      269MB   806MB  537MB               boot
-      1025MiB  224662MiB  223637MiB  ext4         pv0
+      806MB   236GB  235GB               lvm-pv0  lvm
 </file>
+As far as I can tell parted can't label volumes as Linux LVM, so I do that using fdisk.
+<file sh>
+root@kubuntu:~# fdisk /dev/nvme0n1
+Welcome to fdisk (util-linux 2.33.1).
+Changes will remain in memory only, until you decide to write them.
+Be careful before using the write command.
+Command (m for help): t
+Partition number (1-3, default 3): 3
+Partition type (type L to list all types): 31
+Changed type of partition 'Linux filesystem' to 'Linux LVM'.
+Command (m for help): p
+Disk /dev/nvme0n1: 238.5 GiB, 256060514304 bytes, 500118192 sectors
+Disk model: PC401 NVMe SK hynix 256GB
+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: 14779AE7-C2BB-4F6A-9F6E-A927FAF7AAFB
+Device           Start       End   Sectors   Size Type
+/dev/nvme0n1p1    2048    526335    524288   256M Microsoft basic data
+/dev/nvme0n1p2  526336   1574911   1048576   512M Linux filesystem
+/dev/nvme0n1p3 1574912 460107775 458532864 218.7G Linux LVM
+Command (m for help): w
+The partition table has been altered.
+Calling ioctl() to re-read partition table.
+Syncing disks.
+</file>
+=== Create filesystems and LVM structure ===
+<file sh>
+pvcreate /dev/nvme0n1p3
+vgcreate vg0 /dev/nvme0n1p3
+lvcreate -n swap0 -L 16GiB vg0
+lvcreate -n root -l 100%FREE vg0
+</file>
+If you did this correctly you should see the following
+<file sh>
+lvs
+  LV    VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
+  root  vg0 -wi-a----- 202.64g
+  swap0 vg0 -wi-a-----  16.00g
+</file>