USB to increase RAM

John Levine johnl at
Tue May 21 15:01:54 UTC 2019

In article <MWHPR04MB049571F2BA1149AC4E36D41980070 at> you write:
>Windows has a feature called "ReadyBoost" that can use a USB drive to
>increase RAM.

ReadyBoost uses an SSD as a cache between RAM and the regular disk.
More details here:

To do more or less the same thing with ZFS, add the USB disk as a
cache device to your disk pool.  Look at the zpool man page, and
search for "Cache devices".

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