[CentOS] Re: Duplicate PV on HW RAID?

Lanny Marcus lmmailinglists at gmail.com
Tue Jul 29 22:42:18 UTC 2008

On Tue, Jul 29, 2008 at 4:04 PM, Eduardo Grosclaude
<eduardo.grosclaude at gmail.com> wrote:
> On Tue, Jul 29, 2008 at 1:23 PM, Lanny Marcus <lmmailinglists at gmail.com>
> wrote:
>> Eduardo: To give you something else to consider, as an alternative:  I
>> believe there was a long thread here, awhile back, about using
>> Software RAID, instead of fake RAID controllers. Software RAID works
>> very well, as I recall from reading that thread. Possibly look into
>> changing to Software RAID. Depends on the HW RAID controller.
> Yes, I finally ended up installing software RAID because

COOL. There are a bunch of experts (not a word I use frequently) on
this list who can answer the below questions you have about RAID. And,
you can search the list for past threads about RAID.

> 1) I have read that, even if I installed the proper driver, Linux only uses
> it to configure its own dm software RAID device according to the BIOS conf--
> is this completely true? If yes, no real offloading anything to hardware
> anyway-- even under Windows; does anybody know about this for sure?
> 2) I am very scared by non-kernel-tree-blessed modules which have their own
> install procedures and/or updating schedule, I have been bitten by this in
> the past.
> I finally did setup two 1-RAIDed identical partitions and installed the
> system on the rest of both disks... Now my system won't boot if one disk is
> broken, but I hope I can go rescue into the data. I was formerly hoping to
> rely on RAID to protect the full install and simplify my life, but I was
> discouraged away by 1) and 2).
> I have yet to see a real RAID controller... At what price do they start off?
<snip sig>

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