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 SRX650 VPN Firewall Security Hub SRX650-BASE-SRE6-645AP w/SRX-GP-IM
$99.99
Juniper MX-MPC2-3D-A Router Card + MIC-3D-4XGE-XFP-A & MIC-3D-20GE-SFP
$799.99
Juniper Networks EX3300-48P 48-Port PoE+ 4x SFP+ Network Switch w/ Power Cord
$43.95
Juniper Networks EX4300-48T 48 Port Gigabit 4 QSFP 40G 2xPSU AFO Network Switch
$89.00
JUNIPER EX3400-48P 48x 1GB PoE+ RJ-45 4x 10GB SFP+ 2x 40GB QSFP+, DUAL AC POWER
$210.00
Juniper EX3400-48P 48-Ports PoE+ 4x SFP+ and 2x QSFP+ Managed Switch Tested
$205.00
Juniper EX3300-48P, 48 Port PoE+ Gigabit Network Switch w/ Power cord
$54.99
Juniper QFX5100-48S-3AFO Switch 48 x 10Gb SFP+, 6x QSFP 40GE, Dual AC Power
$499.00
JUNIPER EX4550-32F-AFO 32-PORT ETHERNET SWITCH 2x POWER SUPPLY - TESTED
$299.99
Juniper Networks EX3300 EX3300-48P 48-Port Gigabit PoE+ Switch
$40.23