67 lines
1.6 KiB
Markdown
67 lines
1.6 KiB
Markdown
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# ZFS on HDD
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So you already installed the system on eMMC or SD? You might want to use ZFS on the hard disk(s)!
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Note: This wiki does not cover root-on-zfs. (Althrough it should be also possible.) We assume rootfs is already on eMMC (or SD) and you want to keep your data on HDDs in ZFS pool.
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Important: *Focal* is required. Do not use Buster.
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## **Step 1** - Install Focal on eMMC
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See necessary steps [here](/helios64/install/transfer).
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## **Step 2** - Install ZFS
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```bash
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sudo armbian-config
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```
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Go to Software and install headers.
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```bash
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sudo apt install zfs-dkms zfsutils-linux
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```
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Optional:
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```bash
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sudo apt install zfs-auto-snapshot
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```
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Reboot.
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## **Step 3** - Prepare partitions
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Use `fdisk` of `gdisk` to create necessary partitions on your hard drive. This is beyond scope of this wiki.
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When ready look for assigned uuids:
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```bash
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ls -l /dev/disk/by-partuuid/
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```
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## **Step 4** - Create ZFS pool
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```bash
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sudo zpool create -o ashift=12 -m /mypool mypool mirror /dev/disk/by-partuuid/abc123 /dev/disk/by-partuuid/xyz789
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sudo zfs set atime=off mypool
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sudo zfs set compression=on mypool
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```
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Of course you may use more disks and create raidz instead of mirror. Your choice. :-)
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Note: Do not use `/dev/sdXY` names. Use uuids only. This way your system will still work when you remove a disk or change order of disks.
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If your disks are SSDs, enable trim support:
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```bash
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sudo zpool set autotrim=on mypool
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```
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## **Step 5** - Reboot
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After reboot make sure the pool was imported automatically:
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```bash
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zpool status
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```
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You should now have working system with root on eMMC and ZFS pool on HDD.
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