Questions tagged [pci-express]
PCI Express (Peripheral Component Interconnect Express)
23
questions with no upvoted or accepted answers
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How to get PCI Tx/Rx byte counters?
I know how to read statistics about the configured network interfaces, for example via cat /proc/net/dev.
Is there a way to read similar byte counters of PCI or PCIe traffic?
Apparently, according ...
- 51
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2
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Why do internal <> external SAS expanders require a PCIe slot?
I have seen examples of home-brew NAS units that use SAS expanders plugged into a host motherboard that has neither a CPU or memory, literally for the purpose of powering the card. If the card doesn't ...
- 211
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Can I Intentionally Disable PCIe Lanes? Or lower PCIe Width?
I am doing some testing on my server and want to lower the width to my PCIe device (or its PCIe bridge).
In case it is relevant, I figured out how to lower my speed based on the PCI Spec with Linux'...
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2
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Hardware RAID array using PCIe based storage? (M.2 / U.2 / full PCIe slot)
Is there currently a mechanism for constructing a hardware RAID array using storage devices that have a full-size PCIe slot, PCIe M.2, or PCIe U.2 bus interface, such as SSDs?
It is extremely ...
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Manually executing option roms (PCIe SATA storage card)
I have an older Dell server, a Poweredge 2900 II, and I would like to use it with large HDDs (> 8 TB). For this, an expansion card is needed, since the motherboard nor the PERC RAID controller can ...
- 21
2
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348
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PCIe: Why pciehp gives contradictory log info
I am running fio jobs on my NVMe SSD and hotplug it then. The platform is hot-pluggable and the system is Centos 7.0.Several seconds after my plug-out, the system encounters a crash and gives these ...
2
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PCIe card memory regions ignored on linux kernel 3.13
On my system, with kernel 3.13.0-32-generic (Ubuntu Server 14.04.1 LTS) installed, one of the PCIe boards in the system (06:00.0) is having it's memory regions ignored:
Interrupt: pin A routed to IRQ ...
- 21
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71
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How to view I/O bridge in linux?
My laptop lenovo legion r7000 2020 env (with amd r7 4800h cpu):
$ uname -a
Linux CzgArch 6.3.8-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 14 Jun 2023 20:10:31 +0000 x86_64 GNU/Linux
Recently when I searched ...
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how can I list all static builtin drivers in kernel, such as pcieport and pciehp?
with lspci I can see things like:
Slot: 00:02.0
Class: PCI bridge [0604]
Vendor: Red Hat, Inc. [1b36]
Device: QEMU PCIe Root port [000c]
Driver: pcieport
In dmesg I can see pcieport 0000:00:02.0: ...
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Unexpected shutdown of Server (BSOD) with message “WHEA_UNCORRECTABLE_ERROR”
When we checked the system event log we found that following warning has been logged repeatedly.
Event 17
A corrected hardware error has occurred.
Component: PCI Express Root Port
Error Source: ...
1
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0
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97
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SFP Card compatibility
We are installing our first "professional" server configuration in the office. We will install a HP ProLiant DL120 Gen9 that will provide a hypervisor based on CentOS / KVM and should be connected to ...
- 11
1
vote
1
answer
394
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PCIex lanes on Supermicro X10SRH-CF
I am trying to set up 5 GPUs on X10SRH-CF to run Tensorflow, but cannot seem to get the board boot up with more than 3 cards plugged in. In some layout I get it to boot with 4 cards but OS (Ubuntu ...
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Clear BIOS "PCI auto configuration"
I got a new HP ProLiant dl360p G8 server. I bought an SFP module from amazon that was made for HP servers. When I turn the server on, the link light stays lite until the BIOS makes it to PCI auto ...
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1
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1
answer
364
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Set a upper bandwidth limit for Infiniband HCAs
I have to deal with PCIe congestion and I need to find a way to reduce PCIe traffic. I get several IB cards in one node (among other PCIe devices). HCAs are FDR Infiniband.
Putting those HCAs in FDR-...
- 111
0
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SSD Software-Raid-0 Ubuntu not as fast as expected
I have an MB ASRock B650 Phantom with two SSD 1TB Samsung 990 PRO m.2 PCIe 4 drives. I set them up in a software Raid-0 with lukscrypt on Ubuntu. The SSD should reach 7.450 MB/s reading, in my naivety ...
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Does interface bandwidth and/or interface type (SATA/NVME) affect IO and Random 4KB RW performance
TLDR: The advertised IOPS of NVME drives is leaps above any SATA SSDs, but how much of this is due to limitations of the:
Interface (SATA/NVME)
Interface Bandwidth (PCIE Gen 4, Gen 3, SATA 3, SATA 2)
...
0
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0
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154
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AMD Optane alternative
I want to have an Optane features with my Ryzen build: high TBW and high I/O. Disk space irrelevant (like MEMPEK1W064GA, 64GB would be enough for me). And it would be nice if I can utilize the full ...
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1
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How to boot M2 Pci express Card HP Gen8 Dl360P
I recently purchased the HP GEN8 DL360P server. I wanted to install an operating system to use M2 with a pci express card on this server. However, the server does not start boot with the pci card. ...
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1
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638
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Configure single LTO tape drive over Fiber Channel HBA
How do you set up a single tape storage drive over an FC HBA? As far as I can tell, these things are not "plug and play". The tape drive I bought is an lto-5 FC taken from a tape library.
I have ...
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0
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0
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Using non-FUJITSU 10Gb Ethernet Cards in FUJITSU servers
We are currently trying to upgrade old servers to 10Gb connections. The servers in question are:
PRIMERGY RX200 S6
PRIMERGY RX300 S5
Our FUJITSU partner told us that there were no cards available by ...
- 101
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892
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PCIe link is not up?
I have purchased a P4080 PCIe board from freescale which is in PCIe form factor. According to the documentation, if I connect the device into the motherboard PCIe slot and then turn it on after PC has ...
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1
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132
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TP-Link TG-3468 on an IBM x3850 M2
I got a networks card from TP-Link. It is the TG-3468. I wanna place it into my IBM server x3850 M2. It has PCIe x8 slots. The slot is a little bit longer than the lenght of the card, but it fits.
...
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Windows Server 2012 not starting when PCIe SSD disk installed
I have Dell Power Edge R905 server with Windows 2012 R2 installed. Everything works great until I install Plextor M6e SSD PCIe x2 card. With card inserted into PCIe x4 or PCIe x8 slot, system starts ...
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