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Archive for February 3rd, 2022

Chrome debugging tip: disabling framework/library code (from Minko Gechev on Twitter)

Posted by jpluimers on 2022/02/03

Cool tip: [] Minko Gechev on Twitter: “Tooling tip: When debugging, you can prevent stepping into framework/library code by using blackboxing. In @ChromeDevTools: ‣ Open the script you don’t want to enter ‣ Right click → Blackbox ‣ Pain free debugging ✨… “


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Posted in Development, JavaScript/ECMAScript, Scripting, Software Development, TypeScript | Leave a Comment »

Samsung 980 Pro NVMe SSD serial in ESXi is in different byte order than the sticker

Posted by jpluimers on 2022/02/03

I installed three Samsung 980 Pro NVMe SSD devices in various ESXi rigs.

This is the serial numbers that ESXi came up with:

  1. Local NVMe Disk (t10.NVMe____Samsung_SSD_980_PRO_1TB_________________E824B311B1382500)
  2. Local NVMe Disk (t10.NVMe____Samsung_SSD_980_PRO_1TB_________________782DB311B1382500)
  3. Local NVMe Disk (t10.NVMe____Samsung_SSD_980_PRO_1TB_________________6F2DB311B1382500)

ESXi presents the serial number (actually the EUI64) in reverse byte order of what is on the device labels.

I had to look up what EUI64 was, and it is a kind of UUID (see Universally unique identifier – Wikipedia), but for hardware devices:

  • World Wide Name – WikipediaEach WWN is an 8- or 16-byte number, the length and format of which is determined by the most significant four bits, which are referred to as an NAA (Network Address Authority). The remainder of the value is derived from an IEEE OUI (or from Company Id (CID)) and vendor-supplied information. Each format defines a different way to arrange and/or interpret these components. OUIs are used with the U/L and multicast bits zeroed, or sometimes even omitted (and assumed zero). Though CID has U/L set to 1.The WWN formats include:
    • “Mapped EUI-64” formats manage to fit an EUI-64 address into an 8-byte WWN. Since the NAA is mandatory, and takes up a nibble, this represents a four-bit deficit. These four bits are recouped through the following tricks: First, two bits are stolen from the NAA by allocating NAAs 12, 13, 14, and 15 to all refer to the same format. Second, the remaining two bits are recouped by omitting the U/L and multicast bits from the EUI-64’s OUI. When reconstructing the embedded EUI-64 value, the U/L and multicast bits are assumed to have carried zero values.

  • [Wayback] Base NVM Express – Part One – NVM Express

    A namespace ID (NSID) is an identifier used by a controller to provide access to a namespace (handle to a namespace). An NVMe controller may support multiple namespaces that are referenced using NSID. EUI64 (8 bytes), NGUID (16 bytes) and UUID (128-bit) are globally unique namespace identifiers defined in the Base Specification.

  • [Wayback] VMware Docs: NVMe Devices with NGUID Device Identifiers

    For NVMe devices, ESXi generates device identifiers based on the information it retrieves from the devices. Generally, the NVMe devices support identifiers in EUI64 or NGUID formats, or use both formats. NGUID is a Namespace Globally Unique Identifier that uses the EUI64 16-byte designator format.

  • [Wayback] ESXI6.7 nvme ssd issue – VMware Technology Network VMTN

    Being a software engineer, I am disturbing by the way this software create the disk ID.

    According to the following table from VMware Docs we have some case that the software will not recognize the disk or lost disks.

    ID Formats Supported by Device Device Identifier Generated by Host
    EUI64 ID Format NGUID ID Format ESXi 6.7 and earlier ESXi 6.7 Update 2
    yes yes t10.xxx_EUI64 t10.xxx_EUI64
    yes no t10.xxx_EUI64 t10.xxx_EUI64
    no yes t10.xxx_controller_serial_number (NGUID) as primary ID

    t10.xxx_controller_serial_number as alternative primary ID

    so what if

    1. The NVMe SSD from the same company may use the same EUI64 for every NVMe SSD on the same interface (say using an ASUS Hyper M.2 X16 PCIe 3.0×4 Expansion card with 4 identical NVMe SSD). It is possible because of bad design from the SSD manufacturer, the EUI64 are all the same for the 4 NVMe SSD, under this case, the ESXI will only recognized one of the 4 disks (since the disk will be t10.xxx_EUI64, and EUI64 are the same for all 4 NVMe SSD, The “storage” “adapters” tab did show there are 4 interfaces (adapters), but the “stroage” “devices” will only show 1 disks.
    2. Why there is no “no, no” options?

    I understand that the NVMe standard 1.3 (for ESXi 6.7) is the base of how the NVMe SSD should be designed, but I think the software should be smart enough to cover the mistakes the hardware company may make and so it can recognized most of the NVMe SSD that is available from the market.

    I have the same issue in V7.0! Whatever happened to using something you know is unique like serial numbers or something based off the serial number!

    My two identical NVMe drives show up as one! Very odd how this one got through testing!

    Having same issue with the Asus hyper x16 m. 2 pcie card. I have 4 Intel 660p in it and it’s only showing 1. Even when I changed the bifurcation to x4x4x4x4 for that pcie slot. It actually show nothing. When in auto it shows 1. I’m using esxi 7 though. Trying to test out VMware horizon but esxi not detecting all the nvme in the Asus adapter.

  • [Wayback/] linux.kernel: [PATCH 0/7] Implement NVMe Namespace Descriptor Identification

    This patchset implemets NVMe Namespace Descriptor Identification as of
    NVMe 1.3. The Namespace Descriptor Identification allows a NVMe host
    to query several Namespace Identification mechanisms, such as EUI-64,
    NGUID and UUID from the target. If more than one value is set by the
    target, it can transmit all set values to the host.

  • [Wayback] OS-6042: Need to handle NVMe devices with EUI64 values (SmartOS + ZFS)

    NVMe devices with namespaces with an EUI64 value do not attach to the system. It’d be good if these did.

  • [Wayback] ⚙ D19905 bhyve: Add EUI64 to NVMe device (FreeBSD)

    Add the EUI64 field (part of the Identify Namespace data) to NVMe devices to support UEFI drivers.

    The implementation will accept an IEEE Extended Unique Identifier (EUI-64) from the command line. If one isn’t provided, it will create one based on

    • The IEEE OUI reported in the Identify Controller data
    • The PCI bus, device/slot, function values
    • The Namespace ID
  • [Wayback] nvme-scsi: Use correct byte ordering for eui64 in Dev ID VPD – Patchwork
    NVME specifies an EUI64/NGUID in little-endian format, while SCSI
    specifies that the Device Identification VPD use big-endian for EUI
    formats. The current code copies this bytestream directly from the
    Identification Namespace page, meaning we just need to reverse the
    bytestream when passing it on to the VPD.

    This seems to hold true for NGUID devices, but Keith just pointed out to
    me that it may not hold true for EUI64 devices. It seems like that case
    needs byte swiveling within each field. So I'll NAK for now until I can
    figure out if that's the case.

    This will break existing setups that rely on VPD 0x83 for device
    identification (which I think includes older SuSE distros).
    And once you change the setup anyway please stop using this buggy
    SCSI emulation.

  • [Wayback] A Quick Tour of NVM Express (NVMe)

    • nguid, Namespace Globally Unique Identifier (NGUID) and, eui64, IEEE Extended Unique Identifier (EUI64) are assigned when the namespace is created and preserved across namespace and controller operations (e.g. reset, format).

These are pictures of the devices in the same order:

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Posted in ESXi6.5, ESXi6.7, Hardware, NVMe, Power User, SSD, Virtualization, VMware, VMware ESXi | Leave a Comment »

RegEx character classes in “Searching | Notepad++ User Manual”

Posted by jpluimers on 2022/02/03

I needed to search for IBAN numbers in documents and used this regular expression: [a-zA-Z]{2}[0-9]{2} ?[a-zA-Z0-9]{4} ?[0-9]{4} ?[0-9]{4} ?[0-9]{2} which supports the usual optional whitespace like in NL12 INGB 0345 6789 01.

It is based on a nice list with table of Notepad++ RegEx character classes supported at [Wayback] Searching | Notepad++ User Manual:

Character Classes
  • [set] ⇒ This indicates a set of characters, for example, [abc] means any of the literal characters ab or c. You can also use ranges by doing a hyphen between characters, for example [a-z] for any character from a to z. You can use a collating sequence in character ranges, like in [[.ch.]-[.ll.]] (these are collating sequence in Spanish).
  • [^set] ⇒ The complement of the characters in the set. For example, [^A-Za-z] means any character except an alphabetic character. Care should be taken with a complement list, as regular expressions are always multi-line, and hence [^ABC]* will match until the first AB or C (or ab or c if match case is off), including any newline characters. To confine the search to a single line, include the newline characters in the exception list, e.g. [^ABC\r\n].

Please note that the complement of a character set is often many more characters than you expect: (?-s)[^x]+ will match 1 or more instances of any non-x character, including newlines: the (?-s) search modifier turns off “dot matches newlines”, but the [^x] is not a dot ., so that class is still allowed to match newlines.

  • [[:name:]] or [[:☒:]] ⇒ The whole character class named name. For many, there is also a single-letter “short” class name, ☒. Please note: the [:name:] and [:☒:] must be inside a character class [...] to have their special meaning.
    short full name description equivalent character class
    alnum letters and digits
    alpha letters
    h blank spacing which is not a line terminator [\t\x20\xA0]
    cntrl control characters [\x00-\x1F\x7F\x81\x8D\x8F\x90\x9D]
    d digit digits
    graph graphical character, so essentially any character except for control chars, \0x7F\x80
    l lower lowercase letters
    print printable characters [\s[:graph:]]
    punct punctuation characters [!"#$%&'()*+,\-./:;<=>?@\[\\\]^_{
    s space whitespace (word or line separator) [\t\n\x0B\f\r\x20\x85\xA0\x{2028}\x{2029}]
    u upper uppercase letters
    unicode any character with code point above 255 [\x{0100}-\x{FFFF}]
    w word word characters [_\d\l\u]
    xdigit hexadecimal digits [0-9A-Fa-f]

    Note that letters include any unicode letters (ASCII letters, accented letters, and letters from a variety of other writing systems); digits include ASCII numeric digits, and anything else in Unicode that’s classified as a digit (like superscript numbers ¹²³…).

    Note that those character class names may be written in upper or lower case without changing the results. So [[:alnum:]] is the same as [[:ALNUM:]] or the mixed-case [[:AlNuM:]].

    As stated earlier, the [:name:] and [:☒:] (note the single brackets) must be a part of a surrounding character class. However, you may combine them inside one character class, such as [_[:d:]x[:upper:]=], which is a character class that would match any digit, any uppercase, the lowercase x, and the literal _ and = characters. These named classes won’t always appear with the double brackets, but they will always be inside of a character class.

    If the [:name:] or [:☒:] are accidentally not contained inside a surrounding character class, they will lose their special meaning. For example, [:upper:] is the character class matching :upe, and r; whereas [[:upper:]] is similar to [A-Z] (plus other unicode uppercase letters)

  • [^[:name:]] or [^[:☒:]] ⇒ The complement of character class named name or ☒ (matching anything not in that named class). This uses the same long names, short names, and rules as mentioned in the previous description.


Posted in Development, Notepad++, Power User, RegEx, Software Development, Text Editors | Leave a Comment »

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