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
Juniper PD-4OC192-SON-XFP 710-013264 Four line-rate OC-192c/ STM-64 IPUIA01MTA
$600.00
Juniper Networks EX3300 EX3300-48P 48-Port Gigabit PoE+ Switch
$40.12
JUNIPER EX3400-48P 48x 1GB PoE+ RJ-45 4x 10GB SFP+ 2x 40GB QSFP+, DUAL AC POWER
$210.00
Juniper EX4600-40F-AFI 24 SFP+/SFP Ports 4 QSFP+ Ports Dual AC Switch
$999.00
Juniper Networks EX4300-48T 48 Port Gigabit 4 QSFP 40G 2xPSU AFO Network Switch
$89.00
Juniper Networks EX3300-24P | 24 Port Gigabit Network Switch w/ Power cord
$53.99
Juniper EX3400-48P 48-Ports PoE+ 4x SFP+ and 2x QSFP+ Managed Switch Tested
$205.00
Juniper Networks EX2300-C 12-Port 2XSFP Uplinks PoE+ Switch P/N: EX2300-C-12P
$299.99
New Factory Sealed Juniper EX2300-48P Networks 48-Port Managed Ethernet Sealed
$499.00
Juniper EX2300-48P PoE+ Switch 48x 1GbE & 4 SFP+/SFP 10G uplinks, Tested
$289.00