Search found 640 matches

by Jaga
Fri May 07, 2021 6:28 am
Forum: Technical Support
Topic: 100% write back L2 StorageWrite at 0 percent
Replies: 11
Views: 146

Re: 100% write back L2 StorageWrite at 0 percent

As you have it now, writes land on your L2 and get written out to the target drive, but then they are immediately *cleared* from the L2. Not right. Data are still in the cache after flush. If later Windows need to read these data, PrimoCache still can provide them from the cache. Only when there ar...
by Jaga
Thu May 06, 2021 7:33 pm
Forum: Technical Support
Topic: 100% write back L2 StorageWrite at 0 percent
Replies: 11
Views: 146

Re: 100% write back L2 StorageWrite at 0 percent

Just based on personal experience and a brief understanding of what Chia does, I think 100% shared Read/Write caching space may serve you better as Chia will be able to take full advantage of the data while it still resides in the L2. The idea is that a write "lands" on the L2 volume first...
by Jaga
Thu May 06, 2021 7:12 pm
Forum: Technical Support
Topic: A VFX usecase? SSD+2xHDD with mirroring and speed possible?
Replies: 10
Views: 147

Re: A VFX usecase? SSD+2xHDD with mirroring and speed possible?

I think I know what may be happening for you. Since the L2 cache is set to Read Only, any writes to the drive bypass it entirely. So the benchmark creates a test file (which has never been cached), then reads it directly from the drive (into the cache). You aren't getting "cached speeds" w...
by Jaga
Wed May 05, 2021 4:30 pm
Forum: Technical Support
Topic: A VFX usecase? SSD+2xHDD with mirroring and speed possible?
Replies: 10
Views: 147

Re: A VFX usecase? SSD+2xHDD with mirroring and speed possible?

Did you tell Primocache to cache the Pool, or it's underlying drives? And after ensuring it's caching the underlying drives, have you tried a test against just one of those drives instead of the pool?
by Jaga
Wed May 05, 2021 12:38 am
Forum: Technical Support
Topic: 100% write back L2 StorageWrite at 0 percent
Replies: 11
Views: 146

Re: 100% write back L2 StorageWrite at 0 percent

Can't comment on Chia, I think Romex Support is still evaluating it themselves for suitability with Primocache. Since the L2 still has a large amount of free cache, and the L1 has reached it's limit (you always see 32.00MB when it is full), I suspect Chia is overloading the L1 write queue. It's hard...
by Jaga
Tue May 04, 2021 3:07 pm
Forum: Technical Support
Topic: 100% write back L2 StorageWrite at 0 percent
Replies: 11
Views: 146

Re: 100% write back L2 StorageWrite at 0 percent

You have a *lot* of "urgent writes" for some reason. I rarely have any by comparison. What kind of duty is the drive handling? FTP/web downloads? Movie encoding? Something else? Also, you have both a L1 and a L2 configured, are you certain you setup each to force write only? You are gettin...
by Jaga
Mon May 03, 2021 5:20 am
Forum: Technical Support
Topic: SSD Level-2 Cache Size
Replies: 1
Views: 82

Re: SSD Level-2 Cache Size

This is really subjective for most people. I have a personal preference though: no less than 10% data coverage, and ideal would be 20% or higher. So if your HDD has 1TB of data you want to cache on it, your 240GB L2 (over-provisioned so it only has a 200-220 GB volume for the L2, right?) would be ri...
by Jaga
Mon May 03, 2021 5:16 am
Forum: Technical Support
Topic: A VFX usecase? SSD+2xHDD with mirroring and speed possible?
Replies: 10
Views: 147

Re: A VFX usecase? SSD+2xHDD with mirroring and speed possible?

For over-provisioning, setup a volume using Windows' Disk Managment. Create a volume of 90% or so. You don't need to format it, but it won't hurt either. When you go into Primocache's L2 management area, you can pick that volume and Primocache will re-format it for it's use. Correct on the L1 setup....
by Jaga
Mon May 03, 2021 5:06 am
Forum: Technical Support
Topic: Am I living too dangerously?
Replies: 2
Views: 107

Re: Am I living too dangerously?

1. Is the L2 caching space enabled with some sort of error correction in case of corruption? Not that I am aware of. ECC would only come into play if you had for example, true ECC RAM that the L1 was setup on. Primocache is primarily meant for blazing speed without all the error correction algorith...