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    18TB HGST Ultrastar 550 $328

    No. (btw @73DodgeCharger ... aka AlmostKowalski? :)) I suspect that the spec sheet is in error (or ???). From the DC HC550 data sheet : we DO see that (in Configuration>Format:) both 4Kn & 512e ARE listed. But note that NONE of the Model Numbers (SATA OR SAS)specify a 4Kn format. On page 2 of...
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    Pin config issues on U.2 ports to NVMe M.2 IcyDock cage

    Sounds like a good plan! {Pls follow-up with hot-swap outcome.) Note that IcyDock also has a V2 of their U.2 cage, with the same changes (noted above): connector:sff-8643==>sff-8612 && pinout:??==>sff-9402 Enjoy your new system! Really neat that such capable toys are so accessible/affordable...
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    Pin config issues on U.2 ports to NVMe M.2 IcyDock cage

    Update: SFF-9402 Q: When is a (citation of a) specification NOT a specification? A: When an oldtimer, who should know better, does not read it carefully. [Ref: SFF-9402 Specification] (in my above post) The wiring description (from pg. 25) was prefaced (on pg. 14) with: So, it looks like it's...
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    Pin config issues on U.2 ports to NVMe M.2 IcyDock cage

    I hope I'm wrong. (I want to be wrong!) Good for you. If you mean you are going to start by connecting your mobo U.2 port(s) #38 (& #39) to 1 (or 2) of the IcyDock cage's ports, you might try this cable. If Gigabyte and IcyDock adhered to the SFF-9402 spec, it should work. You could contact...
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    18TB HGST Ultrastar 550 $328

    Bravo! I had noticed that the sender got the details. For instance, Amazon's Track_Package/see_all_updates would give the itinerary. But UPS would not give it to me, even when I was logged in (UPS MyChoice; so they knew I was me, and it was my pkg) Looks like 17track.net knows the backdoor.
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    Pin config issues on U.2 ports to NVMe M.2 IcyDock cage

    [Hey, this stuff is new to me too; retired 25 yrs ago. Strictly a (retirement) hobby now; like, gardening for geeks. But, I'm trying to approach it as a (albeit, unpressured) professional.] I'm NOT certain of the non-hotswap of your mobo. But if they did have it, they'd "brag" about it...
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    18TB HGST Ultrastar 550 $328

    Since about 6 months ago, I've noticed that UPS tracking no longer includes intermediate points in the itinerary. After the origin point, you get nothing until the dispatch station at destination. Whagawan widdat?
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    looking for free OS for my server

    And, you can "digitize" your cheat sheet: How to use aliases in linux shell commands Even for advanced users, good for longer, hard-to-remember commands. E.g.: alias lobotomy='sync; echo 1 > /proc/sys/vm/drop_caches' alias fflobotomy='sync; echo 3 > /proc/sys/vm/drop_caches' [The first one...
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    Strange MDADM RAID 6 behaviour

    I don't know; I am (since 1973) strictly command-line, on Unix. [Mea culpa ... "Do as I say, not as I do."] (...Googling...) ... maybe there is something to toggle/comment in a startup file (for Xfce?). Speaking of which, maybe there is an (easy?) way to suppress startup of Xfce (vs runlevels...
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    Strange MDADM RAID 6 behaviour

    After more pondering, my bet is that Thunar is the agent provocateur[**], so, rather than mucking with runlevels, etc., (please humor me) try booting with Thunar disabled/eliminated, and try that dd command. (If I'm wrong, we can resort to mucking ...) [**] This is/would-be not a fault of...
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    Multi-NVMe (m.2, u.2) adapters that do not require bifurcation

    Of course it's concurrent. The card is a HBA using a PEX8748, configured as 8* x4 NVMe/PCIe/SFF-8643. As stated/documented, full spec performance, the card will NOT be the bottleneck.
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    Pin config issues on U.2 ports to NVMe M.2 IcyDock cage

    THE solution to your problem, now, and far into the future, is the Broadcom P411W-32P [Product Brief] [User Guide] . (PCIe gen4 x16, 8*NVMe, SFF-9402 compliant, full+ Surprise/HotPlug/Swap support) Note that the mechanical/analog part of hot-swap is easy. It's the electrical/digital part that is...
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    Multi-NVMe (m.2, u.2) adapters that do not require bifurcation

    I thought I did ... "[full spec performance]" ... :) i.e., PCIe Gen3 x16 (14 GB/s) ... Read: ~/bin [ 1022 ] # nvmt -t 3 4 5 6 nvme3 = 3286.2 Md/sec nvme4 = 3275.6 Md/sec nvme5 = 3246.1 Md/sec nvme6 = 3292.6 Md/sec ================ Total = 13100.5 Md/sec ~/bin [ 1023 ] # nvmt -t 3 4 5 6 7...
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    Parental Control/Monitoring Solutions?

    While I do appreciate skepticism[/sarcasm?], you probably meant to write: ?? :) :) (Obligatory) Software Stuff: The shortcomings of LR parsing on English ...
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    Converting an HP DL380e Gen8 14xLFF Server to a Disk Shelf

    Yes, it should definitely work (e.g., for RAID50) w/12xLFF + 4x(SFFx4). And, IF the 2nd port on your 12xLFF backplane can be used as an output, then the P822 should work w/12xLFF + 6x(SFFx4) by connecting one (P822) internal port (single-link) to one port on 12xLFF, 2nd P822 internal port to...
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    Converting an HP DL380e Gen8 14xLFF Server to a Disk Shelf

    The H240 lacks the connections to do what you specified.
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    Converting an HP DL380e Gen8 14xLFF Server to a Disk Shelf

    I don't know much about HW RAID (but I doubt two controllers can conspire). I would expect a (single) P822 [alone] could work well; the two internal ports connecting (dual-link) to the (12x) LFF, and each (of 4) external port connected to one (of the 4) SFF ports. But, I'm just "guessing".
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    Converting an HP DL380e Gen8 14xLFF Server to a Disk Shelf

    Glad you found that "path to TRUE enlightenment". Earlier, you asked: See below (or look at your own 12xLFF backplane); see that chip (under heatsink) in the center? I'm pretty sure that's a SAS Expander chip, which enables you to connect 12 (ie 3x4) drives to a single SAS port on your HBA (or...
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    Converting an HP DL380e Gen8 14xLFF Server to a Disk Shelf

    Please provide a source for that spec (IN a document from HP!).
  20. U

    Strange MDADM RAID 6 behaviour

    @Mashie , pardon my sloth -- kept getting bogged down trying to write a script that would have the best chance of exposing real/useful info. ... meanwhile ... Kudos to @Goose : I've had this suspicion ever since seeing: 4KB reads are the "tell". I intended my new script to be run without...