[mythtv-users] Why RAID 5 stops working in 2009

[John Drescher]

On Tue, Oct 28, 2008 at 1:00 PM, Magnus <magnus at yonderway.com> wrote:
> John Drescher wrote:
>> I guess we all have our opinions. On all of my 1TB+ raid 5 and 6
>> arrays home and work  (well except a single 2TB array) I have LVM on
>> top of raid so that I can break the filesystem up in smaller chunks so
>> that filesystem corruption does not send all of my data to the bit
>> bucket...
>
>
> If your filesystem is FUBAR, I don't think it's going to matter whether
> you're striping your data via lvm2 or md.  If you have to take a RAID
> volume out of an LVM Volume Group in a hurry, your filesystem is down.
> Every Physical Volume in a Volume Group needs to have good integrity, so
> the RAID will prevent your PV from showing bad blocks to the filesystem
> in most cases.  But if the filesystem itself is corrupt, the GIGO
> principle applies.
>
>

My point was smaller filesystems will have less damage from a
filesystem going FUBAR so I avoid the 1 huge several TB partition.

John