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Be careful! Those 8 (vertical) connectors are LP_8i. It could be difficult and/or expensive to source 8i-to-LP_8i cables; or adapter x16 slot cards with LP_8i connectors. SLIM_1, 2, 6, and 7 are "regular" (non-LP), 2x 8i each -- easy connectivity. Good value cards and cables (especially...

I figured it out. tnx anyway

Only PCIe Gen3, but GREAT price (while/if it lasts). PCIe x16 host to 8 x4 targets (via 4x SFF-8654_8i ports). Search aliexpress.com for >>CNS44PE16<< Sold by Ceacent_Store (the manufacturer). Price: US$50 (+10ship) I've been using one for 4+ years; excellent results. Just bought another! (At...

Warning! Real-time data acquisition is unforgiving of any shortfall in throughput at the ingest point. The Startech card does have a dedicated controller for each of the "5Gbps ports", BUT it does NOT (and can not) provide the full 5Gbps of throughput on any of those ports. As per the Startech...

Fallacy ... since the PCIe g3 x8 max is 7 GB/s (which is < 12 GB/s) (With all your storage) If YOU actually put 18-24 SATA3 SSDs, each capable of 400+ MB/s, on a SAS3 expander, which is dual-linked/"wide" to a PCIe g3 x8 SAS3 HBA, then YOU will experience a max throughput limit of <6 GB/s. The...

That is the premise I was addressing. But ... - If you connect non-12G devices (i.e. no SAS3) however many [e.g., 24x SATA3 SSDs], the total bandwidth will NOT exceed 6 GB/s (typical max is 4-5 GB/s). - You are definitely bottlenecked, but it is NOT by PCIe bandwidth. Try it ... :)

[EDIT: This post replaces #16] Only true for SAS3 drives. For SAS2 drives and, especially SATA drives, bottleneck of throughput is, typically, 4-5 GB/s. (And, yes, this is with the (tested) drives on a (dual-channel connected) SAS3 expander!) [Hint/clue: this limitation is circumvented...

NOTE: In response to @i386 post #17 (below), this post (#16) is "disowned" (though still visible) and replaced by #18. Note that #16 & #18 differ only in the quoted content; my reply remains the same. Only true for SAS3 drives. For SAS2 drives and, especially SATA drives, bottleneck of...

Just noticed a couple of items on AliExpress that I bought a while ago (for a fair price), currently on sale at large discount. [Note: Links and prices might vary for non-US user] 1. Ceacent CNS41CX16I SFF8654 8i to PCIe x8 (x16 phys) Riser Card $6.5 (+$9 ship) [Link] 2. Ceacent CNS42PE16...

Yes, that cable is correct. [ @TheSilentTroubadour the SFF-8482 connector works for both SAS & SATA] Better to buy it from its manufacturer [Ceacent] and save $20+ [Link] .

Also, Wrong! (see Post #1).

Wrong!! LSI 9500-8i has a single SFF-8654 **8i** connector.

A U.2-NVMe device (which is how this Viking cutie is expecting to be treated) only requires 12v. (All 3.3v etc. needed internally, and supplied externally [4x M.2], will be derived from that.) Your real focus should be assuring decent airflow (top and bottom), so a vertical placement might be...

Yes, I knew what you did wrong when I posted my reply (above). And, (accounting for that mistake,) my conclusion was that your drives have max seq speeds, both r&w, in the range 950-1050 MB/sec (maybe up to 1150). I.e. they're A-OK SAS3 SSDs. [This would make a great Job Interview...

dd is a good tool for determining the ~max seq speeds (r/w) for SAS/SATA drives (within the/any constraints imposed by the controller used). For read: dd if=/dev/sdX of=/dev/null bs=4M count=256 iflag=direct [skip=Nk] For write: dd if=/dev/zero of=/dev/sdX bs=4M count=256 oflag=direct [seek=Nk]...

I refrained from suggesting this to you because it does put additional stress on your drives, which were in an unprotected state. [I would have been a Murphy-enabler.] Unpredictable. The consequences of a RAM error (even/just a single bit-flip) range from zero to the irreparable destruction of...

Thanks for the added details. They give the doctor a better understanding of the patient ... but the prognosis remains the same -- faulty RAM memory. And, since your data disks have no (SnapRAID) protection at this point, the best thing to do, now, is to find/fix the RAM problem. Memtest86+...

[I know SnapRAID (inside-out).] Am I correct to assume that the "DANGER! Wrong file CRC in pathname" message is during the early/preliminary stage of the sync operation (ie, before you get to see the "Syncing ..." line)? [If so,] From your description of the symptoms, it is certain that you...

No. @thulle was correct!

Ref: HDD Idle Power ( @ Idle_0 [ready to rock-n-roll w/ 0-delay]) (from HGST/DellWDC OEM manuals) 4TB SAS - 7.6w 8TB - 18TB SAS - 5.8w [Note: the SATA Enterprise equivalents are 5-10% less.]