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@@ -164,12 +164,14 @@ Debian 10 Buster
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## System Storage
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-- The system drive doesn’t need to be super fast if not used a lot for service stuff. It's typically built from one overprovisioned SSD (leave 10% unused at the end) or 2 mirrored HDDs (as they're less reliable).
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+- The system drive doesn’t need to be super fast if not used a lot for service stuff. It's typically built from one SSD (optionally overprovisioned) or 2 mirrored HDDs (as they're less reliable).
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- Set the boot flag on `/boot/efi` (UEFI) or `/boot` (BIOS). It's not used, but some hardware may require it to try booting the drive.
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- Swap can be added either as a partition, as an LVM volume or not added at all.
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- Use LVM or ZFS (if supported/stable) for the whole main disk, except the boot and EFI partitions.
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- Use EXT4 for general filesystems if ZFS is nor supported or appropriate.
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- Optionally use only the first half of the disk for LVM/system stuff and the other half as for ZFS.
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+- Storage typically uses base-10 prefixes, not base-2, like speed and unlike memory.
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+- SSDs can be overprovisioned in order to improve performance by leaving unused space the SSD can use internally. Factories typically reserve some minimum size appropriate to the drive, but users can overprovision further by leaving space unallocated/unpartitioned at the end of the drive. It's typically not needed to overprovision newer SSDs.
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### System Volumes Suggestion
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Håvard O. Nordstrand