Best drives to use for ZFS SLOG w/ 9300-8i

I think instead of worrying about PLP you should invest in a viable system Battery Backup.
Personally I am using 512GB NVMe. One for SLOG and one for L2ARC.
I went this route because I had all 3 LSI controllers occupied on my 24 bay machine.
If I had to buy them again I would probably only use 256GB NVMe for each.

Some of this choice would come back to your zpool devices. Are you using hard drives or SSD?
An SSD for a zpool of hard drives seems like an appropriate SLOG but for a zpool of SSD's I would use an NVMe for SLOG.
That is my 2 cents from a new ZFS user.
 
I saw you post on the mailing list with no replies. I am assuming you want actual drive recommendations.
If I had to use SAS drives I would use Toshiba PX02SM Series.
These are mid endurance and the PX02SMF040 offers 400GB of PLP protected storage.
Perfect for SLOG or L2ARC for my array size.
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Toshiba PX02SMF040 400GB SSD - Quick Benchmarks

Our quick benchmarks and review of the Toshiba PX02SMF040 400GB SSD SAS3. This time we preview some of our database test latency data.
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What sort of drives are you running for the zpool? Will some, or all, of them be on the same SAS9300-8i controller?

There are two SFF8643 high density headers on the SAS9300-8i controller card, so breaking out to 4 x SAS connectors and 4 x SATA connectors is probably an option, as is 8 x SAS xor 8 x SATA.

As Phishfry implies, it's important for the performance (and especially the write latency) of a SLOG to be superior to the zpool. If not, you are wasting your money (leave the ZIL in the default location, which is the zpool).
 
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