Dear All -
If I use the command fdisk -l I get the usual and expected output of the style
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 131604479 131602432 62.8G 7 HPFS/NTFS/exFAT
/dev/sda2 131604480 1180327679 1048723200 500.1G 7 HPFS/NTFS/exFAT
/dev/sda3 1180327680 2229050879 1048723200 500.1G 7 HPFS/NTFS/exFAT
My question concerns the line
/dev/sda1 * 2048 131604479 131602432 62.8G 7 HPFS/NTFS/exFAT
Surely that means that /dev/sda1 starts at sector number 2048 and that there are 2,048 sectors at the start of /dev/sda (yes, numbered 0000-2047) allocated otherwise?
For various reasons I want to zero these initial sectors of /dev/sda using the command
dd if=/dev/zero of=/dev/sda count=2048
but to my annoyance (and very considerable damage to the system) this also zeroes the first sector of /dev/sda1.
That is, the dd command zeroes not just those sectors numbered 0000-2047 but also the sector numbered 2048: so 2049 altogether. not 2048.
I am absolutely convinced that my understanding of counts / numbers / numbering as described above was correct under 7.4.2 and that I issued commands, many times, in the manner describe without damaging /dev/sda1; (but I am a bit nervous now about checking that)!
Can anybody conform that I am right? That I am wrong? That dd under 8.2.0 is glitchy?
Thank you!
Fergus
PS And by the way (completely different and unconnected) I find the file /boot/isolinux/ifcpu64.c32 is broken in the 8.2.0 installation and I have to over-write it with the same file from 7.4.2 for things to work properly. Anybody else?
Fergus
Lenovo ThinkPad T580 15.6" Core i5 8250U 8GB 256GB, Windows 11 Home
$199.99
Lenovo ThinkPad T580 15.6 in Core i5 8250U 8 GB 256 GB, Windows 11 Home
$220.00
Lenovo ThinkPad X1 Carbon 7th 14" Core i5 8365U 8GB 256GB, Windows 11 Home
$259.99
Lenovo IdeaPad 3 15IIL05 i5-1035G1 1.0GHz 15" 12GB RAM 256GB SSD Win 11
$129.99
Lenovo Legion 5 15.6" Gaming Laptop AMD R7 7735HS RTX 4060 16GB RAM 512GB SSD
$999.99
Lenovo - LOQ 15.6" Gaming Laptop FHD - Intel Core i5-13420H with 8GB Memory -...
$629.99
Lenovo ThinkPad Yoga 11e 11.6" 2in1 Touch Intel Core i3 4GB RAM 128GB SSD Win10
$59.00
Lenovo ThinkPad X1 Nano 13" Touchscreen 2K i7-1180G7 16GB/256GB Win 10 Pro
$599.69
Lenovo Legion 5 Gen 7 AMD Laptop, 15.6 FHD 165Hz, Ryzen 7 6800H , RTX 3070 Ti
$924.99
Notebook Lenovo Slim Pro 9 Laptop, 16" Glass, i9-13905H, GB, 1TB SSD
$1051.99