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
Crucial 8GB 1x8GB PC RAM PC3L 12800U DDR3 1600MHz Desktop Memory DIMM
$8.36
Crucial 8GB SO-DIMM PC3-12800 (DDR3-1600) Memory
$9.49
A-Tech 8GB DDR3 1600 PC3-12800 Laptop SODIMM 204-Pin Memory RAM PC3L DDR3L 1x 8G
$13.99
Corsair Vengeance RGB Pro SL 32GB (4 x 8GB) PC4-25600 (DDR4-3200) Memory...
$85.00
Micron 16GB DDR4-2400 SODIMM MTA16ATF2G64HZ-2G3E1 Laptop Memory RAM
$21.99
Crucial DDR3L 16GB 1600 2x 8GB PC3-12800 Laptop SODIMM Memory RAM PC3 16G DDR3
$22.45
G.Skill Ripjaws V 2 x 16GB DDR4-3200 PC4-25600 CL16 Dual Channel Desktop Memory
$49.99
1 x 16GB SK Hynix PC4-2666V DDR4 ECC REG Server Memory HMA82GR7CJR8N-VK (SK4
$15.80
Samsung M393A8G40AB2-CWE 64GB 2Rx4 PC4-25600 ECC Registered Server Memory RAM
$134.99
A-Tech 64GB 2x 32GB 2Rx4 PC4-23400R DDR4 2933MHz ECC REG RDIMM Server Memory RAM
$109.98