Did you hear about the man who got cooled to absolute zero? He’s 0K now.
The oldest reference I could find is at [Archive.is] Science Joke – 5.
Via G+
–jeroen
Archive for May, 2019
Did you hear about the man who got cooled to absolute zero? He’s 0K now.
Posted by jpluimers on 2019/05/09
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VMFS metadata files
Posted by jpluimers on 2019/05/09
For my own ference:
disk space under VMFS-3 is organized according to four resource types. They are : blocks, sub-blocks, pointer blocks, and file descriptors. Resources are grouped into clusters, which form cluster groups. Every resource type is administered by one or a number of system files. Lets have a look at what those abbreviated file names stand for:
- fbb.sf = file block bitmap.sf
- fdc.sf = file descriptor cluster.sf
- pbc.sf = pointer block cluster.sf
- sbc.sf = sub-block cluster.sf
- vh.sf = volume header.sfs
- dd.sf = scsi device description.sf
The VMFS-5 uses one more system file:
- pb2.sf = pointer block 2.sf
Source: [Archive.is] VMFS metadata files
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Inside the die of Intel’s 8087 coprocessor chip, root of modern floating point
Posted by jpluimers on 2019/05/08
Interesting bits on the bias generator: [WayBack] Inside the die of Intel’s 8087 coprocessor chip, root of modern floating point.
Via
- [WayBack] Modern floating point started with Intel’s 8087 chip in 1980. I took detailed die photos of this chip. One interesting circuit I found is the substrate … – Ken Shirriff – Google+
- [WayBack] Modern floating point started with Intel’s 8087 chip in 1980. I took detailed die photos of this chip. One interesting circuit I found is the substrate … – Kristian Köhntopp – Google+
–jeroen
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On my reading list: stuff on U-Boot, Device-Tree, etc
Posted by jpluimers on 2019/05/08
For my reading list:
- [Archive.is] device tree overlays and U-Boot – Raspberry Pi Forums
- [Archive.is] Raspberry Pi – U-boot
- [WayBack] State scripts | Mender documentation
- [WayBack] meta-mender/README.md at master · mendersoftware/meta-mender
It might be that Mender 1.7 and up support OpenSuSE:
- [WayBack] Mender 1.7 beta: Broader Linux support | Mender
- [WayBack] 1.7 | Mender documentation
- [WayBack] Building a Mender Debian image | Mender documentation
- [WayBack] [MEN-2040] Research in adapting GRUB to Raspberry PI3 board. – Northern.tech AS
via:
- [Archive.is] Raspberry changing mac – Google Groups
- [WayBack] rpi: Fix DTB handling for Mender-based Raspberry Pi boards. · mendersoftware/meta-mender@264cf2e
- [WayBack] [yocto] [meta-raspberrypi][PATCH v5] u-boot: Simplify boot script
DTB = Device Tree Blob
–jeroen
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Linux shell / ESXi – scripts to get md5sum for sets of files in sorted and regular order
Posted by jpluimers on 2019/05/08
A few small scripts without any parameter checking are below.
The are based on these links:
- [Archive.is] linux – How to store and echo multiple lines elegantly in bash? – Stack Overflow
- [WayBack] Capturing multiple line output into a Bash variable – Stack Overflow (which I just found out I mentioned inSource: Getting your local IPv4 addresses, netmasks and CIDRs)
find-in-datastores.sh
#!/bin/sh # Notes: # the "find" parameter "-type l" only links, as they are the datastore aliases # the "sed" appends a slash to all datastore paths datastores_slashes=`find /vmfs/volumes/* -prune -type l | sed 's/$/\//' | xargs echo` # find inside the datatastores with the arguments appended: find $datastores_slashes $@
md5sum-sorted-and-regular.sh:
#!/bin/sh md5sums=`md5sum $@` echo Regular: echo "$md5sums" echo Sorted: echo "$md5sums" | sort
md5sum-of-find-in-datastores-by-name-sorted-and-regular.sh :
#!/bin/sh md5sum-sorted-and-regular.sh `find-in-datastores.sh -name $@`
Example usage:
# md5sum-of-find-in-datastores-by-name-sorted-and-regular.sh EN-10ENT-x64.vmx Regular: 7f34fbceed59957a4b7feb13ef9327a1 /vmfs/volumes/Samsung512NVME/PSO.Template/VM/EN-10ENT-x64/EN-10ENT-x64.vmx 7f34fbceed59957a4b7feb13ef9327a1 /vmfs/volumes/Samsung850-2TB-S2KMNCAGB04321L/PSO.Inactive/VM/EN-10ENT-x64/EN-10ENT-x64.vmx 7f34fbceed59957a4b7feb13ef9327a1 /vmfs/volumes/Samsung850-2TB-S3D4NX0HA01043L/PSO.Inactive/VM/EN-10ENT-x64/EN-10ENT-x64.vmx Sorted: 7f34fbceed59957a4b7feb13ef9327a1 /vmfs/volumes/Samsung512NVME/PSO.Template/VM/EN-10ENT-x64/EN-10ENT-x64.vmx 7f34fbceed59957a4b7feb13ef9327a1 /vmfs/volumes/Samsung850-2TB-S2KMNCAGB04321L/PSO.Inactive/VM/EN-10ENT-x64/EN-10ENT-x64.vmx 7f34fbceed59957a4b7feb13ef9327a1 /vmfs/volumes/Samsung850-2TB-S3D4NX0HA01043L/PSO.Inactive/VM/EN-10ENT-x64/EN-10ENT-x64.vmx
–jeroen
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Visual Studio direct download links
Posted by jpluimers on 2019/05/07
For my link archive:
- All downloads: https://code.visualstudio.com/
- Direct Windows download: https://code.visualstudio.com/docs/?dv=win64user or https://aka.ms/win32-x64-user-stable
- Direct macOS download: https://code.visualstudio.com/docs/?dv=osx or https://go.microsoft.com/fwlink/?LinkID=620882
–jeroen
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More Delphi debug visualizers
Posted by jpluimers on 2019/05/07
I hope that by now they are available for more Delphi versions:
- [WayBack] A new test release of my dzDebugVisualizers for Delphi 2005, 2006 and 2007 is available. Apart from fixing an Access Violation when unloading the package… – Thomas Mueller (dummzeuch) – Google+
- added support for TDateTime and unquoted (multiline) strings to the Evaluate / Modify window [Archive.is] dzDebugVisualizers for Delphi 2005, 2006 and 2007 2017-09-30 – twm’s blog
- [WayBack] The linked page documents the Display Format Specifiers for expressions in the Evaluate / Modify dialog of the Delphi IDE. S and C seem to do the same… – Thomas Mueller (dummzeuch) – Google+
Some other posts around the Debug Visualiser topic:
- [WayBack] Intro · darianmiller/dxIDEPackage_JSONStringVisualizer Wiki
- [WayBack] New in 10.2.1: Debug visualisers for Delphi generics – Community Blogs – Embarcadero Community
- [WayBack] Something small but useful. https://community.embarcadero.com/blogs/entry/new-in-10-2-1-debug-visualisers-for-delphi-generics – David Millington – Google+
- [WayBack] Format specifiers in the debugger (C#) | Microsoft Docs via [WayBack] CC +Thomas Mueller – Jeroen Wiert Pluimers – Google+
–jeroen
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ESXi: console commands to digging through your hba/disk/datastore configuration
Posted by jpluimers on 2019/05/07
Two posts with interesting commands to help digging through your hba/disk/datastore configurations from the console:
- [Archive.is] Some Useful Storage Commands | Welcome to VMware KB Blog
- [Archive.is] Identifying disks when working with VMware ESXi/ESX (1014953) | VMware KB
One day I will write a script that – per datastore – lists all the devices related to it including their HBA and LUN.
For that, I will likely need these references:
- [WayBack] linux – Looping through the content of a file in Bash? – Stack Overflow
- [Archive.is] BashFAQ/024 – Greg’s Wiki – I set variables in a loop that’s in a pipeline. Why do they disappear after the loop terminates? Or, why can’t I pipe data to read?
For now this works:
- Get the list of data stores (note the
Device Namecolumn has theNAA_IDyou need below):
esxcli storage vmfs extent list - Get the path information to find
HBA,Channel,TargetandLUN:
esxcli storage core path list --device NAA_ID - Get the list of HBAs:
esxcli storage core adapter list - Get device details (including
ModelandRevision):
esxcli storage core device list --device NAA_ID
The example below (with most important output bolded) shows a drive connected to a SAS3008 based controller which storcli cannot access (nor MegaCli), but MegaRAID Storage Manager (MSM) can.
MSM allowed me to find the serial number of the drive by the Target Transport Details value 4433221106000000 as being on Slot number 6 (which seems to indicate Target numbers are 1-based whereas LUN is 0-based).
# esxcli storage vmfs extent list Volume Name VMFS UUID Extent Number Device Name Partition ------------------------------ ----------------------------------- ------------- -------------------------------------------------------------------------- --------- ... ST6000VX0001-1SH 59a33f7b-66df7c00-11b0-0cc47aaa9742 0 naa.5000c50087762d1b 1 # esxcli storage core path list -d naa.5000c50087762d1b sas.500304801ce1d700-sas.4433221106000000-naa.5000c50087762d1b UID: sas.500304801ce1d700-sas.4433221106000000-naa.5000c50087762d1b Runtime Name: vmhba0:C0:T7:L0 Device: naa.5000c50087762d1b Device Display Name: Local ATA Disk (naa.5000c50087762d1b) Adapter: vmhba0 Channel: 0 Target: 7 LUN: 0 Plugin: NMP State: active Transport: sas Adapter Identifier: sas.500304801ce1d700 Target Identifier: sas.4433221106000000 Adapter Transport Details: 500304801ce1d700 Target Transport Details: 4433221106000000 Maximum IO Size: 4194304 # esxcli storage core adapter list HBA Name Driver Link State UID Capabilities Description -------- ------------ ---------- -------------------- ------------ ---------------------------------------------------------------------- vmhba0 lsi_msgpt3 link-n/a sas.500304801ce1d700 (0000:01:00.0) Avago (LSI Logic) Fusion-MPT 12GSAS SAS3008 PCI-Express ... vmhba32 vmkusb link-n/a usb.vmhba32 () USB # esxcli storage core device list --device naa.5000c50087762d1b naa.5000c50087762d1b Display Name: Local ATA Disk (naa.5000c50087762d1b) Has Settable Display Name: true Size: 5723166 Device Type: Direct-Access Multipath Plugin: NMP Devfs Path: /vmfs/devices/disks/naa.5000c50087762d1b Vendor: ATA Model: ST6000VX0001-1SH Revision: VN02 SCSI Level: 6 Is Pseudo: false Status: on Is RDM Capable: true Is Local: true Is Removable: false Is SSD: false Is VVOL PE: false Is Offline: false Is Perennially Reserved: false Queue Full Sample Size: 0 Queue Full Threshold: 0 Thin Provisioning Status: unknown Attached Filters: VAAI Status: unsupported Other UIDs: vml.02000000005000c50087762d1b535436303030 Is Shared Clusterwide: false Is Local SAS Device: true Is SAS: true Is USB: false Is Boot USB Device: false Is Boot Device: false Device Max Queue Depth: 32 No of outstanding IOs with competing worlds: 32 Drive Type: physical RAID Level: NA Number of Physical Drives: 1 Protection Enabled: false PI Activated: false PI Type: 0 PI Protection Mask: NO PROTECTION Supported Guard Types: NO GUARD SUPPORT DIX Enabled: false DIX Guard Type: NO GUARD SUPPORT Emulated DIX/DIF Enabled: false
–jeroen
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Posted in ESXi5, ESXi5.1, ESXi5.5, ESXi6, ESXi6.5, Power User, Virtualization, VMware, VMware ESXi | Leave a Comment »
chrome://settings/clearBrowserData to clear Chrome browser cache
Posted by jpluimers on 2019/05/06
The quickest way for me to clear the Chrome browser cache is to:
- navigate to chrome://settings/clearBrowserData,
- tick “Cached images and files”
- click “Clear Data”
Done.
Much faster than [WayBack] Clear cache & cookies – Computer – Google Account Help: When you use a browser, like Chrome, it saves some information from websites in its cache and cookies. Clearing them fixes certain problems, like loading or formatting issues on sites.In Chrome
–jeroen
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BorgBackup – Deduplicating archiver with compression and authenticated encryption
Posted by jpluimers on 2019/05/06
On my research list:
Borg
Deduplicating archiver
with compression and encryptionBorgBackup (short: Borg) gives you:
- Space efficient storage of backups.
- Secure, authenticated encryption.
- Compression: LZ4, zlib, LZMA.
- Mountable backups with FUSE.
- Easy installation on multiple platforms: Linux, macOS, BSD, …
- Free software (BSD license).
- Backed by a large and active open source community.
Source: [WayBack] BorgBackup – Deduplicating archiver with compression and authenticated encryption
Repositories:
- borgbackup/borg: Deduplicating archiver with compression and authenticated encryption.
- borgbackup/borgweb: Web UI for Borg Backup
- borgbackup/borg-import: importer for rsync+hardlink based backups / rsnapshot
- borgbackup/community: Resources from the Borg Community
–jeroen
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The Wiert Corner - irregular stream of stuff 