Category: storage / NAS / QNAP

SAS connected NVMes aka Kingston’s datacenter capable (24-7) NVMe SSDs (DC 1500m Enterprise-class U.2 PCIe NVMe Gen 3.0 x4 SSD) only work with mainboard that have U.2 interface – U.2 on Desktop is called mini-SAS or SFF-8643 on Servers
10.03.2022

IDE, SCSI, SATA, SAS now U.2 M.2… these drives are called: “U.2 PCIe NVMe” no kidding, search for em on ebay. that reminds of… “the usb cable chaos” has arrived with “Slim SAS” for another round of mass cable connector confusion […]

GNU Linux & Windows Server 2012 R2 – benchmark results HighPoint SSD7101A-1 NVMe RAID (harddisk) card + 4x 1TB Kingston NVMe (KINGSTON SA2000M81000G)  (individually and in mdadm RAID10 mode) – disk failures under Win 2012 R2
20.05.2021

update 2025: very basic cross os distribution monitor harddisk speeds bash script by counting sector read write UPDATE: 2022 may have to appoligize to HighPoint and ALTERNATE, as other RAID systems such as the AMD RAIDXpert2 based systems (same concept) […]

unit of data storage – byte kilobyte megabyte gigabyte terabyte petabyte exabyte zettabyte yottabyte nonabyte doggabyte kibibyte mebibyte gibibyte tebibyte pebibyte exbibyte zebibyte yobibyte nobibyte dogbibyte
12.01.2021

Byte The term byte was coined by Werner Buchholz in June 1956,[4][13][14][b] during the early design phase for the IBM Stretch[15][16][1][13][14][17][18] computer, http://archive.computerhistory.org/resources/text/IBM/Stretch/pdfs/Buchholz_102636426.pdf backup mirror: PLANNING A COMPUTER SYSTEM BROJECT STRETCH Buchholz Campbell_102636426.pdf which had addressing to the bit and […]

GNU Linux – basic harddisks benchmarks with dd and fio (ssds  KINGSTON SKC600512G vs Samsung SSD 850 PRO vs Samsung SSD 860 EVO vs Samsung SSD 870 EVO 1TB) – ntfs vs ext4 – how fast are virtual harddisks?
13.11.2020

https://wiki.archlinux.org/title/benchmarking update 2025: very basic cross os distribution monitor harddisk speeds bash script by counting sector read write update 2022: next to the good old (non-destructive if used correctly) “dd” is still the way to go for benchmarking harddisks under […]

10.01.2020

mdadm -E /dev/sd[a-z] # -E, –examine # Print contents of the metadata stored on the named device(s). # Note the contrast between –examine and –detail. # –examine applies to devices which are components of an array, while # –detail applies […]

how to change uuid of logical lvm partitions
16.07.2019

problem: manually changing uuids is tidious and might not yield the result you want. unfortunately have not succeeded yet with integrating an old harddisk.vdi (same uuids) back into the template vm (same uuids) – so the recommendation is: reinstall os […]