[Discuss] Ext4, ugh! Re: Disk recovery utilities - dealing with deleted files

[Rich Pieri]

On Wed, 06 Feb 2013 09:41:39 -0500
Derek Atkins <warlord at MIT.EDU> wrote:

> Sounds like you want RAID1..

NO.

NO.

NO.

A THOUSAND TIMES, NO!

RAID provides no data integrity. None. Zilch. Zero. Nada.

Given two mirrored disks A and B. If you accidentally run a recursive
delete like Rich did then your data is gone. RAID will not let you
recover the deleted data.

If a controller goes stupid or glitches during a write then at least
one disk will have garbage data on it. RAID will not protect you from
this.

If a RAID rebuild uses that garbage data as the mirror "master" then you
will really loose all of your data. To the contrary of your assertion,
RAID will blindly and silently and automatically destroy your data.

-- 
Rich P.