RE: How to erase all data on disks

wouldn't it be better to have if=3D/dev/random or /dev/urandom ??

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> -----Original Message-----
> From: [email protected]=20
> [mailto:[email protected]] On Behalf Of SAID MOKHTARI
> Sent: Tuesday, March 04, 2008 9:29 AM
> To: Discussion of Red Hat Enterprise Linux 3 (Taroon)
> Subject: RE: How to erase all data on disks
>=20
> boot from cd or dvd with rescue mode (linux rescue)
> Then you can use dd to erase each disk=20
>=20
> # dd if=3D/dev/zero of=3D/dev/sda
> # dd if=3D/dev/zero of=3D/dev/sdb
> # sync
>=20
> bye
> -----Message d'origine-----
> De=A0: [email protected]=20
> [mailto:[email protected]] De la part de=20
> d.qureshi-7yFXA2EciJlaa/[email protected]
> Envoy=E9=A0: lundi 3 mars 2008 16:42
> =C0=A0: [email protected]
> Objet=A0: How to erase all data on disks
>=20
> I have a Compaq Prolianr ML370 server running Red Hat Linux release
> 7.1. The server has two local disks each 18GB and mirrored as RAID 1.
>=20
> How do I erase all the data on each disk?
>=20
> fdisk -l  displays the following file systems.
>=20
> # fdisk -l
>=20
> Disk /dev/sda: 255 heads, 63 sectors, 2213 cylinders
> Units =3D cylinders of 16065 * 512 bytes
>=20
>    Device Boot    Start       End    Blocks   Id  System
> /dev/sda1             6        71    530145   fd  Linux raid=20
> autodetect
> /dev/sda2            72       333   2104515   fd  Linux raid=20
> autodetect
> /dev/sda3             1         5     40131   12  Compaq diagnostics
> /dev/sda4           334      2213  15101100    5  Extended
> /dev/sda5           334       464   1052226   fd  Linux raid=20
> autodetect
> /dev/sda6           465       628   1317298+  fd  Linux raid=20
> autodetect
> /dev/sda7           629       890   2104483+  fd  Linux raid=20
> autodetect
> /dev/sda8           891      2213  10626966   fd  Linux raid=20
> autodetect
>=20
> Partition table entries are not in disk order
>=20
> Disk /dev/sdb: 255 heads, 63 sectors, 2213 cylinders
> Units =3D cylinders of 16065 * 512 bytes
>=20
>    Device Boot    Start       End    Blocks   Id  System
> /dev/sdb1             6        71    530145   fd  Linux raid=20
> autodetect
> /dev/sdb2            72       333   2104515   fd  Linux raid=20
> autodetect
> /dev/sdb3   *         1         1      8001   12  Compaq diagnostics
> /dev/sdb4           334      2213  15101100    5  Extended
> /dev/sdb5           334       464   1052226   fd  Linux raid=20
> autodetect
> /dev/sdb6           465       628   1317298+  fd  Linux raid=20
> autodetect
> /dev/sdb7           629       890   2104483+  fd  Linux raid=20
> autodetect
> /dev/sdb8           891      2213  10626966   fd  Linux raid=20
> autodetect
>=20
> Partition table entries are not in disk order
>=20
>=20
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>=20
>=20
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