On Mon, Jan 02, 2012 at 07:54:48PM -0800, da...@lang.hm spake thusly:
> the BIOS doesn't know about the raid, so if the drive the BIOS is
> trying to boot from is dead, how do you get the bootloader to
> startup to even find the kernel?
My standard procedure in that case has always been to tell th
Tracy Reed said:
In what way does Linux need to know it is doing software RAID to boot
from a mirror? It boots the kernel, grabs the initfs from one of the
drives, assembles the RAIDs, pivots root to whatever I tell it, usually
/dev/md0 which is just another block device to the OS. Perhaps wha
If you're going to make this change and want to avoid it in the future,
start using some power strips that support two diverse power inputs (e.g.
WTI ATIS http://www.wti.com/c-43-power-transfer-switch.aspx).
Frank
-Original Message-
From: tech-boun...@lists.lopsa.org [mailto:tech-boun...@
On Mon, Jan 02, 2012 at 10:27:50PM -0500, Brandon Allbery spake thusly:
> The hardware/software distinction, in practicality, is "does the OS need to
> know that it's actually doing RAID?" Because there are a lot more failure
> modes if it does, and more complex situations (as already mentioned, b
On Mon, Jan 2, 2012 at 20:24, Tracy Reed wrote:
> The hardware/software distinction in RAID is largely meaningless these
> days and
> mostly a matter of myth and urban legend.
>
The hardware/software distinction, in practicality, is "does the OS need to
know that it's actually doing RAID?" Beca
On Mon, Jan 02, 2012 at 06:30:14PM -0800, da...@lang.hm spake thusly:
> the one thing that's key about hardware raid vs software raid is
> that good hardware raid cards have battery backed cache on the card.
Yes, I do agree that is one of the good things about battery backed RAID cards.
Although i
Tracy Reed said:
On Mon, Jan 02, 2012 at 09:12:44AM -0500, Edward Ned Harvey spake
thusly:
If it's in BIOS, then it's hardware. Below the OS, regardless of what
OS you're talking about. Right? Or is there some new BIOS-vs-software
standard I'm not aware of?
BIOS is software stored in m
On Mon, Jan 02, 2012 at 09:12:44AM -0500, Edward Ned Harvey spake thusly:
> If it's in BIOS, then it's hardware. Below the OS, regardless of what OS
> you're talking about. Right? Or is there some new BIOS-vs-software
> standard I'm not aware of?
BIOS is software stored in memory mapped into th
On Mon, Jan 02, 2012 at 09:26:32AM -0500, Doug Hughes spake thusly:
> RAID in hardware generally means parity (XOR, DP, etc.) calculations being
> supported by special circuitry. That isn't the case for the BIOS chipset,
> thus it is software RAID.
In software RAID on x86 the parity is usually d
On 01/02/12 10:58, Anton Cohen wrote:
> BIOS RAID is usually FakeRAID. There is no hardware RAID controller,
> just a normal SATA controller. The BIOS does some magic during boot,
> once the OS loads the RAID functionality is performed by a special OS
> driver and the CPU, just like software RAID i
On Mon, Jan 2, 2012 at 6:12 AM, Edward Ned Harvey wrote:
> If it's in BIOS, then it's hardware. Below the OS, regardless of what OS
> you're talking about. Right? Or is there some new BIOS-vs-software
> standard I'm not aware of?
>
BIOS RAID is usually FakeRAID. There is no hardware RAID contr
Having recently played with Windows mirroring (dynamic disks) and Intel Matrix
RAID
I find myself interested in a Hardware RAID solution for my own system.
Seems every few months I have a lock up, that requires the Matrix RAID set to
get initialized again. Have had to use image backups to re
On 1/2/2012 9:12 AM, Edward Ned Harvey wrote:
From: tech-boun...@lists.lopsa.org [mailto:tech-boun...@lists.lopsa.org]
On Behalf Of 'Luke S. Crawford'
Most motherboards nowadays support mirroring. All the dell laptops I've
bought in the last 2 years support raid mirroring, and half of them
do
> From: tech-boun...@lists.lopsa.org [mailto:tech-boun...@lists.lopsa.org]
> On Behalf Of 'Luke S. Crawford'
>
> > Most motherboards nowadays support mirroring. All the dell laptops I've
> > bought in the last 2 years support raid mirroring, and half of them
don't
> > even have two hard drive bay
On Fri, Dec 30, 2011 at 09:29:09PM -0500, Edward Ned Harvey wrote:
> Most motherboards nowadays support mirroring. All the dell laptops I've
> bought in the last 2 years support raid mirroring, and half of them don't
> even have two hard drive bays.
Yeah; but the BIOS raid is almost always real
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