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
Supermicro 4U 4x Nvidia GPU AI Server 3.8Ghz 8-Core 256GB 2x10G SFP+ 2x2200W
$3472.00
Supermicro 4U 4x Nvidia GPU AI Server 3.8Ghz 8-Core 64GB 2x10G SFP+ 2x2200W
$3180.00
Supermicro 4U 4x Nvidia GPU AI Server 2.6Ghz 8-Core 256GB 2x10G SFP+ 2x2200W
$1382.00
Intel - Core i9-13900K 13th Gen 24 cores 8 P-cores + 16 E-cores 36M Cache, 3 ...
$689.99
Intel - Core i7-13700K 13th Gen 16 cores 8 P-cores + 8 E-cores 30M Cache, 3.4...
$489.99
Intel - Core i7-12700K Desktop Processor 12 (8P+4E) Cores up to 5.0 GHz Unloc...
$419.99
Apple Mac Pro Processor Tray 5,1 2010 2012 2.4ghz 8 core
$79.99
i9 9900k 8-Core 16GB RAM - 1TB SSD - 2 TB HDD - NVIDIA RTX 4060ti - Gaming PC
$1799.99
Dell Optiplex 5060 SFF 8th Gen Core i7 3.2GHZ 16GB 512GB Win 11 Pro
$249.00
HP EliteDesk 800 G4 Micro Intel Core i5-8500T 2.1GHz 8GB RAM 256GB SSD W11P WIFI
$120.00