Displaying 2 results from an estimated 2 matches for "start4kblock".
2020 Sep 14
0
erasing a disk
...thing like
> -erase first N blocks (block defined as 4096)
> - Erase <number> blocks starting at block <number>
> - erase last <number> blocks
Use dd in a script:
#!/bin/bash
# erase N 4K blocks starting at M
# (M=0 means from the start of the disk)
# usage: $0 start4Kblock numberof4Kblocks drive
M = $1
N = $2
rawdisk = $3
dd if=/dev/zero bs=4096 oflag=direct count=$N seek=$M of=$rawdisk
> At least such an algorithm would be quicker than erasing 8 TB of data.
>
> David
>
> _______________________________________________
> CentOS mailing list
>...
2020 Sep 14
6
erasing a disk
Folks
I've encountered situations where I want to reuse a hard-drive. I do
not want to preserve anything on the drive, and I'm not concerned
about 'securely erasing' old content. I just want to be able to
define it as an Physical Volume (in a logical volume set), or make it
a ZFS disk, or sometimes make it a simple EXT3, ExFAT or NTFS
disk. However, old