Search found 298 matches

by Jaga
Sat Dec 15, 2018 12:33 am
Forum: Latest News
Topic: [2017-12-21] PrimoCache 3.0.2 released!
Replies: 55
Views: 11206

Re: [2017-12-21] PrimoCache 3.0.2 released!

Important: you should never employ write caching on you OS as a rule of thumb to minimize risk. Which I disagree with, if you take steps to protect the OS drive and the data on it. Use a good UPS. Don't overclock to unsafe/untested limits. Use ECC RAM if possible. Keep a weekly Full backup and at l...
by Jaga
Thu Dec 13, 2018 8:08 am
Forum: Technical Support
Topic: L2 cache advise needed (SSD)
Replies: 8
Views: 131

Re: L2 cache advise needed (SSD)

support wrote:
Thu Dec 13, 2018 3:00 am
Is it possible you generate large files to another partition without cache? You may just cache the partition in which downloaded files are stored.
That's essentially what I do with multi-part FTP downloads - the temp folder for the .parts is on a separate un-cached drive.
by Jaga
Wed Dec 12, 2018 11:22 pm
Forum: Technical Support
Topic: Why does L2 deferred write eat physical memory?
Replies: 3
Views: 92

Re: Why does L2 deferred write eat physical memory?

Like the title says, I don't understand why (when not wanting read-buffer at all) primocache still requires GB's of physical memory to achieve a reasonably small block size? Indexing. The more blocks, the larger the index. It maps blocks (Primocache) to groups of clusters (volume), and the more of ...
by Jaga
Tue Dec 11, 2018 6:19 am
Forum: Technical Support
Topic: L2 cache advise needed (SSD)
Replies: 8
Views: 131

Re: L2 cache advise needed (SSD)

support wrote:
Tue Dec 11, 2018 3:08 am
Use a faster NVMe SSD as L2 cache can also speed up SATA SSDs.
That's interesting - I figured the overhead for doing NVME L2 operations would have killed the overall IOPS speeds.
by Jaga
Mon Dec 10, 2018 10:20 pm
Forum: Technical Support
Topic: L2 cache advise needed (SSD)
Replies: 8
Views: 131

Re: L2 cache advise needed (SSD)

Normally you wouldn't use L2 caching (a SSD or NVME) on another SSD - it can kill performance due to unnecessary shuffling and operations. Due to the amount of memory in the system, you should leave the L1 block size equal to the cluster size on the volume (usually 4k). It'll eat some RAM, but give ...
by Jaga
Mon Dec 10, 2018 10:15 pm
Forum: Technical Support
Topic: Cache strategy needed by turning off write cache on harddisk device
Replies: 3
Views: 94

Re: Cache strategy needed by turning off write cache on harddisk device

I've been told by Romex support in the past to simply leave the Windows write-caching algorithm at it's default setting. Enable write caching in that interface, but leave write-cache buffer flushing off.
by Jaga
Mon Dec 10, 2018 10:09 pm
Forum: Latest News
Topic: [2017-12-21] PrimoCache 3.0.2 released!
Replies: 55
Views: 11206

Re: [2017-12-21] PrimoCache 3.0.2 released!

Typically I'll find a good day for the array to be offline for several hours, then manually kick off an analyze and then a full (free space) defrag on the volumes I think need it the most. Due to it's ability to do multiple drives at once, it only takes as long as a single drive would take. I don't ...
by Jaga
Thu Dec 06, 2018 8:14 pm
Forum: Latest News
Topic: [2017-12-21] PrimoCache 3.0.2 released!
Replies: 55
Views: 11206

Re: [2017-12-21] PrimoCache 3.0.2 released!

I don't really do set-it-and-forget it defragmentation, since it can mess with Primocache's content and hit rates when clusters are constantly being moved around and the cache is running. Once a month or two I'll take my Drive pool offline and do individual defragmentation. Pausing Primocache, runni...
by Jaga
Thu Dec 06, 2018 5:03 pm
Forum: Latest News
Topic: [2017-12-21] PrimoCache 3.0.2 released!
Replies: 55
Views: 11206

Re: [2017-12-21] PrimoCache 3.0.2 released!

@Asgaroth - While it wasn't mentioned, I use Auslogics Disk Defrag Professional, for it's ability to defragment multiple drives at the same time. When I take my 9-drive storage pool offline I want it back up in less than a day, and Auslogics allows me to do that due to processing speed. Just a sugge...
by Jaga
Tue Dec 04, 2018 10:18 pm
Forum: Technical Support
Topic: Setup advice
Replies: 3
Views: 175

Re: Setup advice

You should still be able to switch the controller from RAID to AHCI mode. Then make sure RST software is uninstalled in Windows (leaving the driver installed is okay). Setup the array using Windows Disk Management, then run Samsung Magician to see if it can still see the drives - it should be able t...