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
***NEW*** BCM RX67Q Gaming Motherboard | Intel Q67 2nd/3rd Gen. | LGA1155 | DDR3
$29.77
ASUS H110M-R Motherboard Intel 6th/7th Gen LGA1151 DDR4 Micro-ATX i/o shield
$42.00
Asus PRIME H510M-A Intel LGA 1200 DDR4 SDRAM Desktop Motherboard w/ I/O shield
$64.98
Gigabyte AMD B550 UD AC Gaming Motherboard - AMD B550 Chipset - AM4 Socket - AMD
$89.99
Asus Prime H310M-A R2.0 Intel LGA 1151 DDR4 Desktop Motherboard
$46.99
MSI B450M PRO-VDH MAX AM4 AMD B450 USB3.2 Micro-ATX Motherboard
$67.99
Micro ATX Desktop Motherboard ASUS H110M-C LGA 1151
$31.95
ASUS B150M-C Motherboard mATX W/LGA1151 6TH/7TH GEN CPU DDR4 SATA HDMI Tested
$55.00
GIGABYTE MB10-Datto Motherboard Xeon D-1521- SR2DF 2.40 GHz- Open Box
$121.50
Asus X99-A II Foxconn LGA2011 ATX Motherboard - Motherboard Only
$112.50