Using intel Optane P1600X for write cache
Posted: Sat Jan 14, 2023 6:48 pm
Hello, fellows!
I have just purchased intel Optane P1600X to be used as cache drive and trying to figure out how to use it most properly.
I have few consideration I would like to share.
1) Optane P1600X has some insane TBW. I assume that means it's best should as a write-through (Defer-Write) cache.
2) It has extremely low read response time (7ns) and therefore very fast read speed in short queues (240Mb/s 4KQ4) - so to use it for caching another SSD is very proper also.
3) However this drive has low linear read/write speed. (Less that 2GB/s) While my main SSD drive has about 7GB/s. On the other hand there are not so much scenarios when linear speed is impotant on home machine. Exept, maybe, Cyberpunk installation 120GB or working with video files. Do I understand correctly that in this scenarios it's better to torn off Defer-Write?
4) Impotant one. How safe is to have an L2 cache Defer-Write enabled? Do I understand corerctly that having L2-only SSD write cache enabled does not affect the integrity of the written data compared to writing directly to SSD in case of - for example - power shutdown or system hang? I mess with overclocking sometimes.
All-in-all my main question how to use this drive most efficiently without taking any additional data integrity risks.
So far I think I should set up DEFAULT write cache for Optane SSD but NOT for L1.
Will it be proper use for this drive?
I have just purchased intel Optane P1600X to be used as cache drive and trying to figure out how to use it most properly.
I have few consideration I would like to share.
1) Optane P1600X has some insane TBW. I assume that means it's best should as a write-through (Defer-Write) cache.
2) It has extremely low read response time (7ns) and therefore very fast read speed in short queues (240Mb/s 4KQ4) - so to use it for caching another SSD is very proper also.
3) However this drive has low linear read/write speed. (Less that 2GB/s) While my main SSD drive has about 7GB/s. On the other hand there are not so much scenarios when linear speed is impotant on home machine. Exept, maybe, Cyberpunk installation 120GB or working with video files. Do I understand correctly that in this scenarios it's better to torn off Defer-Write?
4) Impotant one. How safe is to have an L2 cache Defer-Write enabled? Do I understand corerctly that having L2-only SSD write cache enabled does not affect the integrity of the written data compared to writing directly to SSD in case of - for example - power shutdown or system hang? I mess with overclocking sometimes.
All-in-all my main question how to use this drive most efficiently without taking any additional data integrity risks.
So far I think I should set up DEFAULT write cache for Optane SSD but NOT for L1.
Will it be proper use for this drive?