Adam Tauno Williams wrote:
This isn't true. IBMs IPS series controllers can the checked and configured via the ipssend utility that works very well in 2.6.x LINUX.
Unfortunately, what we got (in the IBM) was the garbage ServeRaid 8kl
card. This one is atrocious - it shipped with a hideous firmware bug.
And there is no way to bypass it.
The HP have the P400 cards, which are decent in themselves, just not as
good as software raid.
Richard
"Scott Marlowe" <scott.marlowe@xxxxxxxxx> wrote:
On Thu, Dec 24, 2009 at 11:09 AM, Richard Neill <rn214@xxxxxxxxx> wrote:
Jeremy Harris wrote:
On 12/24/2009 05:12 PM, Richard Neill wrote:
Of course, with a server machine, it's nearly impossible to use mdadm
raid: you are usually compelled to use a hardware raid card.
Could you expand on that?
Both of the last machines I bought (an IBM X3550 and an HP DL380) come with
hardware raid solutions. These are an utter nuisance because:
- they can only be configured from the BIOS (or with a
bootable utility CD). Linux has very basic monitoring tools,
but no way to reconfigure the array, or add disks to empty
hot-swap slots while the system is running.
- If there is a Linux raid config program, it's not part of the
main packaged distro, but usually a pre-built binary, available
for only one release/kernel of the wrong distro.
- the IBM one had dodgy firmware, which, until updated, caused the
disk to totally fail after a few days.
- you pay a lot of money for something effectively pointless, and
have less control and less flexibility.
After my experience with the X3550, I hunted for any server that would ship
without hardware raid, i.e. connect the 8 SATA hotswap slots direct to the
motherboard, or where the hardware raid could be de-activated completely,
and put into pass-through mode. Neither HP nor IBM make such a thing.
Yep. And that's why I never order servers from them. There are
dozens of reputable white box builders (I use Aberdeen who give me a 5
year all parts warranty and incredible customer service, but there are
plenty to choose from) and they build the machine I ask them to build.
For hardware RAID I use Areca 1680 series, and they also provide me
with machines with software RAID for lighter loads (slave dbs,
reporting dbs, and stats dbs)
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