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
Intel Core i7-7700 3.60GHz Quad-Core CPU
$41.78
Intel - Core i7-14700K 14th Gen 20-Core 28-Thread - 4.3GHz (5.6GHz Turbo) Soc...
$397.99
Intel - Core i5-14600K 14th Gen 14-Core 20-Thread - 4.0GHz (5.3GHz Turbo) Soc...
$306.99
Intel - Core i9-14900K 14th Gen 24-Core 32-Thread - 4.4GHz (6.0GHz Turbo) Soc...
$547.99
AMD Ryzen 7 7700 Processor (5.3 GHz, 8 Cores, Socket AM5) Boxed -...
$185.00
Intel Xeon E5-2680 v4 SR2N7 14 Core 2.4 GHz Server Processor
$15.45
AMD Ryzen 5 4500 6-Core 3.6GHz Socket AM4 65W CPU Desktop Processor
$77.77
(1) Intel Core i5-8500 @ 3.00 GHZ Desktop CPU (SR3XE)
$49.00
Intel Core i9-9900 SRG18 3.10GHz 16MB 8-Core LGA1151 CPU Processor
$269.99
Intel Core i9-9900K Processor LGA1151 CPU
$259.00