Does SSD Cache count as a pool disk re: Ashift 12/13

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Does SSD Cache count as a pool disk re: Ashift 12/13

Postby luminousdolphin » Sun Sep 20, 2015 6:28 pm

In the tutorial it states using ashift=13 if any pool devices will be ssd.

Does this count for l2arc / zil?

Currently have 4 non-ssd disks set to ashift=12, looking to add l2arc and zip and wondering if I have to change this.
luminousdolphin
 
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Re: Does SSD Cache count as a pool disk re: Ashift 12/13

Postby Brendon » Sun Sep 20, 2015 9:00 pm

The advice to use ashift=13 for SSDs is a little contentious. Its quite space inefficient. ymmv.

l2arc/slog are not subject to this i.e. you cant control the ashift for cache devices.

Cheers
Brendon

luminousdolphin wrote:In the tutorial it states using ashift=13 if any pool devices will be ssd.

Does this count for l2arc / zil?

Currently have 4 non-ssd disks set to ashift=12, looking to add l2arc and zip and wondering if I have to change this.
Brendon
 
Posts: 286
Joined: Thu Mar 06, 2014 12:51 pm


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