HATs and other add-ons • Re: NVMe x4 and x1 compatibility?

Code:

pi@book14pi4:~ $ sudo curl https://raw.githubusercontent.com/TheRemote/PiBenchmarks/master/Storage.sh | sudo bash  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current                                 Dload  Upload   Total   Spent    Left  Speed100 36196  100 36196    0     0   113k      0 --:--:-- --:--:-- --:--:--  113kTrimming and syncing drives .../boot/firmware: 436.9 MiB (458166272 bytes) trimmed on /dev/nvme0n1p1/: 449.8 GiB (482940678144 bytes) trimmed on /dev/nvme0n1p2Board information: Manufacturer: Raspberry Pi Foundation - Model: Raspberry Pi Compute Module 4 Rev 1.0 - Architecture: aarch64 - OS: Debian GNU/Linux 12 (bookworm)Fetching required components ...Clock speeds: CPU: 2000 - Core: 500System rootfs drive (/) has been detected as /dev/nvme0n1p2 (nvme0n1p2)Starting INXI hardware identification...System:  Kernel: 6.1.72-v8+ arch: aarch64 bits: 64 compiler: gcc v: 12.2.0 Desktop: wayfire v: 0.7.5    Distro: Debian GNU/Linux 12 (bookworm)Machine:  Type: ARM System: Raspberry Pi Compute Module 4 Rev 1.0 details: N/A rev: c03140 serial: <filter>CPU:  Info: quad core model: N/A variant: cortex-a72 bits: 64 type: MCP arch: ARMv8 rev: 3 cache:    L1: 320 KiB L2: 1024 KiB  Speed (MHz): avg: 2000 min/max: 600/2000 cores: 1: 2000 2: 2000 3: 2000 4: 2000 bogomips: 432  Features: Use -f option to see featuresGraphics:  Device-1: bcm2711-hdmi0 driver: vc4_hdmi v: N/A bus-ID: N/A  Device-2: bcm2711-hdmi1 driver: vc4_hdmi v: N/A bus-ID: N/A  Device-3: bcm2711-vc5 driver: vc4_drm v: N/A bus-ID: N/A  Display: wayland server: X.org v: 1.21.1.7 with: Xwayland v: 22.1.9 compositor: wayfire    v: 0.7.5 driver:    gpu: vc4-drm,vc4_crtc,vc4_dpi,vc4_dsi,vc4_firmware_kms,vc4_hdmi,vc4_hvs,vc4_txp,vc4_v3d,vc4_vec    resolution: 1280x800~55Hz  API: EGL Message: EGL data requires eglinfo. Check --recommends.Network:  Device-1: bcm2835-mmc driver: mmc_bcm2835 v: N/A port: N/A bus-ID: N/A  IF: wlan0 state: up mac: <filter>  Device-2: bcm2711-genet-v5 driver: bcmgenet v: N/A port: N/A bus-ID: N/A  IF: eth0 state: down mac: <filter>Drives:  Local Storage: total: 465.76 GiB used: 7.29 GiB (1.6%)  ID-1: /dev/nvme0n1 vendor: SanDisk model: Ultra 3D NVMe size: 465.76 GiB    temp: 25° (298 Kelvin) C  Message: No optical or floppy data found.Partition:  ID-1: / size: 456.88 GiB used: 7.22 GiB (1.6%) fs: ext4 dev: /dev/nvme0n1p2Info:  Processes: 205 Uptime: 0m Memory: total: 4 GiB available: 3.7 GiB used: 533.8 MiB (14.1%)  igpu: 76 MiB Init: systemd target: graphical (5) Compilers: gcc: 12.2.0 Packages: 1618  Client: Sudo v: 1.9.13p3 inxi: 3.3.31Running additional hardware identification tests...Additional hardware identification tests completed.Starting mass storage device identification...Running HDParm tests .../dev/nvme0n1p2: Timing O_DIRECT cached reads:   744 MB in  2.00 seconds = 371.17 MB/sec Timing O_DIRECT disk reads: 1106 MB in  3.01 seconds = 368.00 MB/secHDParm: 368.00 MB/sec - HDParmCached: 371.17 MB/secRunning dd tests ...133120+0 records in133120+0 records out545259520 bytes (545 MB, 520 MiB) copied, 2.20932 s, 247 MB/sDD Write Speed: 247 MB/sRunning fio write test ...Running fio read test ...FIO results - 4k RandWrite: 49708 IOPS (198834 KB/s) - 4k RandRead: 74472 IOPS (297890 KB/s)Running iozone test ...Iozone: Performance Test of File I/O        Version $Revision: 3.489 $Compiled for 64 bit mode.Build: linux Run began: Tue Jan 16 13:26:20 2024Auto ModeInclude fsync in write timingO_DIRECT feature enabledFile size set to 81920 kBRecord Size 4 kBCommand line used: iozone -a -e -I -i 0 -i 1 -i 2 -s 80M -r 4kOutput is in kBytes/secTime Resolution = 0.000001 seconds.Processor cache size set to 1024 kBytes.Processor cache line size set to 32 bytes.File stride size set to 17 * record size.                                                              random    random     bkwd    record    stride                                                  kB  reclen    write  rewrite    read    reread    read     write     read   rewrite      read   fwrite frewrite    fread  freread           81920       4    93259   135344   120543   120448    49196   132558                                                                iozone test complete.RandRead: 49196 - RandWrite: 132558 - Read: 120543 - Write: 93259Enter a description of your storage and setup (Example: Kingston A400 SSD on Pi 4 using StarTech SATA to USB adapter)Description: Sandisk Corp WD Blue SN550 NVMe SSD 500GB - on CM4IO(Optional) Enter alias to use on benchmark results.  Leave blank for completely anonymous.Alias (leave blank for Anonymous): aBUGSworstnightmare     Category                  Test                      Result     HDParm                    Disk Read                 368.00 MB/sec            HDParm                    Cached Disk Read          371.17 MB/sec            DD                        Disk Write                247 MB/s                 FIO                       4k random read            74472 IOPS (297890 KB/s) FIO                       4k random write           49708 IOPS (198834 KB/s) IOZone                    4k read                   120543 KB/s              IOZone                    4k write                  93259 KB/s               IOZone                    4k random read            49196 KB/s               IOZone                    4k random write           132558 KB/s                                        Score: 27840                                       Compare with previous benchmark results at:https://pibenchmarks.com/pi@book14pi4:~ $ 

Code:

pi@book14pi4:~ $ sudo nvme smart-log /dev/nvme0n1Smart Log for NVME device:nvme0n1 namespace-id:ffffffffcritical_warning: 0temperature: 24°C (297 Kelvin)available_spare: 100%available_spare_threshold: 10%percentage_used: 0%endurance group critical warning summary: 0Data Units Read: 835,726 (427.89 GB)Data Units Written: 763,122 (390.72 GB)host_read_commands: 9,955,463host_write_commands: 5,408,300controller_busy_time: 65power_cycles: 467power_on_hours: 208unsafe_shutdowns: 120media_errors: 0num_err_log_entries: 1Warning Temperature Time: 0Critical Composite Temperature Time: 0Thermal Management T1 Trans Count: 0Thermal Management T2 Trans Count: 0Thermal Management T1 Total Time: 0Thermal Management T2 Total Time: 0pi@book14pi4:~ $ sudo smartctl -a /dev/nvme0n1smartctl 7.3 2022-02-28 r5338 [aarch64-linux-6.1.72-v8+] (local build)Copyright (C) 2002-22, Bruce Allen, Christian Franke, www.smartmontools.org=== START OF INFORMATION SECTION ===Model Number:                       SanDisk Ultra 3D NVMeSerial Number:                      20511G803175Firmware Version:                   211070WDPCI Vendor/Subsystem ID:            0x15b7IEEE OUI Identifier:                0x001b44Total NVM Capacity:                 500,107,862,016 [500 GB]Unallocated NVM Capacity:           0Controller ID:                      1NVMe Version:                       1.4Number of Namespaces:               1Namespace 1 Size/Capacity:          500,107,862,016 [500 GB]Namespace 1 Formatted LBA Size:     512Namespace 1 IEEE EUI-64:            001b44 8b484c36e0Local Time is:                      Tue Jan 16 13:36:02 2024 CETFirmware Updates (0x14):            2 Slots, no Reset requiredOptional Admin Commands (0x0017):   Security Format Frmw_DL Self_TestOptional NVM Commands (0x005f):     Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat TimestmpLog Page Attributes (0x1e):         Cmd_Eff_Lg Ext_Get_Lg Telmtry_Lg Pers_Ev_LgMaximum Data Transfer Size:         128 PagesWarning  Comp. Temp. Threshold:     80 CelsiusCritical Comp. Temp. Threshold:     85 CelsiusNamespace 1 Features (0x02):        NA_FieldsSupported Power StatesSt Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat 0 +     3.50W    2.10W       -    0  0  0  0        0       0 1 +     2.40W    1.60W       -    0  0  0  0        0       0 2 +     1.90W    1.50W       -    0  0  0  0        0       0 3 -   0.0200W       -        -    3  3  3  3     3900   11000 4 -   0.0050W       -        -    4  4  4  4     5000   39000Supported LBA Sizes (NSID 0x1)Id Fmt  Data  Metadt  Rel_Perf 0 +     512       0         2 1 -    4096       0         1=== START OF SMART DATA SECTION ===SMART overall-health self-assessment test result: PASSEDSMART/Health Information (NVMe Log 0x02)Critical Warning:                   0x00Temperature:                        24 CelsiusAvailable Spare:                    100%Available Spare Threshold:          10%Percentage Used:                    0%Data Units Read:                    835,725 [427 GB]Data Units Written:                 763,121 [390 GB]Host Read Commands:                 9,955,355Host Write Commands:                5,408,173Controller Busy Time:               65Power Cycles:                       467Power On Hours:                     208Unsafe Shutdowns:                   120Media and Data Integrity Errors:    0Error Information Log Entries:      1Warning  Comp. Temperature Time:    0Critical Comp. Temperature Time:    0Error Information (NVMe Log 0x01, 16 of 256 entries)No Errors Loggedpi@book14pi4:~ $ grep AER /boot/config-6.1.0-rpi7-rpi-v8CONFIG_PCIEAER=y# CONFIG_PCIEAER_INJECT is not setpi@book14pi4:~ $ sudo lspci -vvv | grep -E 'nvme|LnkSta'LnkSta:Speed 5GT/s, Width x1LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1-LnkSta:Speed 5GT/s (downgraded), Width x1 (downgraded)LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete- EqualizationPhase1-Kernel driver in use: nvme