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Ubuntu/Debian: Update for 4Kn 

I tested this on Ubuntu.
Richard Laager 2019-03-18 20:35:56 -05:00
parent 7833828315
commit cffdb36aa1
2 changed files with 17 additions and 12 deletions
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9
Debian-Stretch-Root-on-ZFS.md

@ -6,6 +6,7 @@
### System Requirements ### System Requirements
* [64-bit Debian GNU/Linux Stretch Live CD](http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/) * [64-bit Debian GNU/Linux Stretch Live CD](http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/)
* [A 64-bit kernel is *strongly* encouraged.](https://github.com/zfsonlinux/zfs/wiki/FAQ#32-bit-vs-64-bit-systems) * [A 64-bit kernel is *strongly* encouraged.](https://github.com/zfsonlinux/zfs/wiki/FAQ#32-bit-vs-64-bit-systems)
* Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) only works with UEFI booting. This not unique to ZFS. [GRUB does not and will not work on 4Kn with legacy (BIOS) booting.](http://savannah.gnu.org/bugs/?46700)
Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted. Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted.
@ -58,12 +59,12 @@ If you have a second system, using SSH to access the target system can be conven
2.2 Partition your disk(s): 2.2 Partition your disk(s):
Run this if you need legacy (BIOS) booting: Run this if you need legacy (BIOS) booting:
# sgdisk -a1 -n1:40:2047 -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1 # sgdisk -a1 -n1:24K:+1000K -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1
Run this for UEFI booting (for use now or in the future): Run this for UEFI booting (for use now or in the future):
# sgdisk -n2:1M:+512M -t2:EF00 /dev/disk/by-id/scsi-SATA_disk1 # sgdisk -n2:1M:+512M -t2:EF00 /dev/disk/by-id/scsi-SATA_disk1
Run these in all cases: Run this in all cases:
# sgdisk -n4:0:0 -t4:BF01 /dev/disk/by-id/scsi-SATA_disk1 # sgdisk -n4:0:0 -t4:BF01 /dev/disk/by-id/scsi-SATA_disk1
Always use the long `/dev/disk/by-id/*` aliases with ZFS. Using the `/dev/sd*` device nodes directly can cause sporadic import failures, especially on systems that have more than one storage pool. Always use the long `/dev/disk/by-id/*` aliases with ZFS. Using the `/dev/sd*` device nodes directly can cause sporadic import failures, especially on systems that have more than one storage pool.
@ -255,7 +256,7 @@ Install GRUB to the disk(s), not the partition(s).
4.7b Install GRUB for UEFI booting 4.7b Install GRUB for UEFI booting
# apt install dosfstools # apt install dosfstools
# mkdosfs -F 32 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2 # mkdosfs -F 32 -s 1 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2
# mkdir /boot/efi # mkdir /boot/efi
# echo PARTUUID=$(blkid -s PARTUUID -o value \ # echo PARTUUID=$(blkid -s PARTUUID -o value \
/dev/disk/by-id/scsi-SATA_disk1-part2) \ /dev/disk/by-id/scsi-SATA_disk1-part2) \
@ -263,6 +264,8 @@ Install GRUB to the disk(s), not the partition(s).
# mount /boot/efi # mount /boot/efi
# apt install --yes grub-efi-amd64 # apt install --yes grub-efi-amd64
* The `-s 1` for `mkdosfs` is only necessary for drives which present 4 KiB logical sectors (“4Kn” drives) to meet the minimum cluster size (given the partition size of 512 MiB) for FAT32. It also works fine on drives which present 512 B sectors.
4.7 Set a root password 4.7 Set a root password
# passwd # passwd

8
Ubuntu-18.04-Root-on-ZFS.md

@ -5,7 +5,7 @@
### System Requirements ### System Requirements
* [Ubuntu 18.04.2 ("Bionic") Desktop CD](http://releases.ubuntu.com/18.04/ubuntu-18.04.2-desktop-amd64.iso) (*not* any server images) * [Ubuntu 18.04.2 ("Bionic") Desktop CD](http://releases.ubuntu.com/18.04/ubuntu-18.04.2-desktop-amd64.iso) (*not* any server images)
* A drive which presents 512B logical sectors. Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) should work with UEFI partitioning, but this has not been tested. * Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) only works with UEFI booting. This not unique to ZFS. [GRUB does not and will not work on 4Kn with legacy (BIOS) booting.](http://savannah.gnu.org/bugs/?46700)
Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted. Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted.
@ -62,7 +62,7 @@ If you have a second system, using SSH to access the target system can be conven
2.2 Partition your disk(s): 2.2 Partition your disk(s):
Run this if you need legacy (BIOS) booting: Run this if you need legacy (BIOS) booting:
# sgdisk -a1 -n1:40:2047 -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1 # sgdisk -a1 -n1:24K:+1000K -t1:EF02 /dev/disk/by-id/scsi-SATA_disk1
Run this for UEFI booting (for use now or in the future): Run this for UEFI booting (for use now or in the future):
# sgdisk -n2:1M:+512M -t2:EF00 /dev/disk/by-id/scsi-SATA_disk1 # sgdisk -n2:1M:+512M -t2:EF00 /dev/disk/by-id/scsi-SATA_disk1
@ -325,7 +325,7 @@ Install GRUB to the disk(s), not the partition(s).
4.8b Install GRUB for UEFI booting 4.8b Install GRUB for UEFI booting
# apt install dosfstools # apt install dosfstools
# mkdosfs -F 32 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2 # mkdosfs -F 32 -s 1 -n EFI /dev/disk/by-id/scsi-SATA_disk1-part2
# mkdir /boot/efi # mkdir /boot/efi
# echo PARTUUID=$(blkid -s PARTUUID -o value \ # echo PARTUUID=$(blkid -s PARTUUID -o value \
/dev/disk/by-id/scsi-SATA_disk1-part2) \ /dev/disk/by-id/scsi-SATA_disk1-part2) \
@ -333,6 +333,8 @@ Install GRUB to the disk(s), not the partition(s).
# mount /boot/efi # mount /boot/efi
# apt install --yes grub-efi-amd64-signed shim-signed # apt install --yes grub-efi-amd64-signed shim-signed
* The `-s 1` for `mkdosfs` is only necessary for drives which present 4 KiB logical sectors (“4Kn” drives) to meet the minimum cluster size (given the partition size of 512 MiB) for FAT32. It also works fine on drives which present 512 B sectors.
4.9 Setup system groups: 4.9 Setup system groups:
# addgroup --system lpadmin # addgroup --system lpadmin