Package: debian-installer
Severity: wishlist
Tags: d-i

Hello,

Because many consumer grade SSDs are not over-provisioned by the
manufacturer it might be nice to have an option, in the automatic
partitioning, that reserves a percentage (or a choice of percentages)
of a SSD and leaves the space un-partitioned.

Reserving unused space on an SSD that is never written to helps
prevent write-amplification and so preserves drive performance.
The need for this is dependent upon how much/whether the manufacturer
has over-provisioned the SSD.

See: https://en.wikipedia.org/wiki/Write_amplification

If this is implemented it would also probably be prudent to
suggest to those creating LVM physical volumes that they
may wish to use a partition instead of a raw physical volume
so that space can be reserved for manual SSD over-provisioning.

Regards,
Karl

-- System Information:
Debian Release: 9.9
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-9-amd64 (SMP w/4 CPU cores)
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