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
Fanxiang 4TB 2TB 1TB SSD 550MB/s 2.5'' SATA III Internal Solid State Drive lot
$188.99
Netac 1TB 2TB 512GB 120GB Red Internal SSD 2.5'' SATA III Solid State Drive lot
$118.99
Netac 2TB 1TB 512GB 240GB Internal SSD 2.5'' SATAIII 6Gb/s Solid State Drive lot
$118.99
4 TB SSD SATA III Drive 2.5" Solid State Drive SATAIII 6Gb/s UP to 540MB/s
$148.00
Patriot P210 128GB 256GB 512GB 1TB 2TB 2.5" SATA 3 6GB/s Internal SSD PC/MAC Lot
$19.99
Samsung 870 EVO 500GB 2.5 Inch SATA III Internal SSD Brand New MZ-77E500B/AM
$34.98
Fanxiang M.2 SATA SSD 2TB 1TB 512GB 256GB SSD Internal M2 Solid State Drive Lot
$21.99
Netac 1TB 2TB 512GB Internal SSD 2.5'' SATA III 6Gb/s Solid State Drive lot
$13.99
Fanxiang SSD 4TB 2TB 1TB 512GB SATA SSD 2.5'' III Internal Solid State Drive lot
$108.29
Fanxiang SSD 512GB 1TB 2TB 4TB 2.5'' SSD SATA III Internal Solid State Drive lot
$107.99