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* Dell Perc HX00 RAID controllers: What's inside?
@ 2010-05-07 21:11 Craig James <craig_james@emolecules.com>
2010-05-09 21:20 ` Re: Dell Perc HX00 RAID controllers: What's inside? Greg Smith <greg@2ndquadrant.com>
0 siblings, 1 reply; 3+ messages in thread
From: Craig James @ 2010-05-07 21:11 UTC (permalink / raw)
To: pgsql-performance
Now that it's time to buy a new computer, Dell has changed their RAID models from the Perc6 to Perc H200 and such. Does anyone know what's inside these? I would hope they've stuck with the Megaraid controller...
Also, I can't find any info on Dell's site about how these devices can be configured. I was thinking of ten disks, as
OS: RAID1
WAL: RAID1
Database: RAID10 using 6 disks
But it's not clear to me if these RAID controllers can handle multible arrays, or if you need a separate controller for each array. We're a small shop and I only get to do this every year or so, and everything changes in between purchases!
Thanks,
Craig
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Dell Perc HX00 RAID controllers: What's inside?
2010-05-07 21:11 Dell Perc HX00 RAID controllers: What's inside? Craig James <craig_james@emolecules.com>
@ 2010-05-09 21:20 ` Greg Smith <greg@2ndquadrant.com>
2010-05-10 02:39 ` Re: Dell Perc HX00 RAID controllers: What's inside? Scott Marlowe <scott.marlowe@gmail.com>
0 siblings, 1 reply; 3+ messages in thread
From: Greg Smith @ 2010-05-09 21:20 UTC (permalink / raw)
To: Craig James <craig_james@emolecules.com>; +Cc: pgsql-performance
Craig James wrote:
> Now that it's time to buy a new computer, Dell has changed their RAID
> models from the Perc6 to Perc H200 and such. Does anyone know what's
> inside these? I would hope they've stuck with the Megaraid controller...
The H700 and H800 are both based on the LSI 2180 chipset:
http://support.dell.com/support/edocs/storage/Storlink/H700H800/en/UG/HTML/chapterb.htm
I'm not sure what's in the H200, but since it does not have a write
cache you don't want one of those anyway.
Note that early versions of these cards shipped such that you could not
use non-Dell drives with them. Customer feedback was so overwhelmingly
negative that last month they announced that the next firmware update
will remove that restriction:
http://en.community.dell.com/support-forums/servers/f/906/p/19324790/19689719.aspx#19689719
If I were you, I'd tell Dell that you refuse to make your purchase until
that firmware release is actually available, such that your system ships
without that restriction. That's the right thing to do for the
protection of your company, and it sends the right message to their
sales team too: this sort of nonsense only reduces their sales.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg@2ndQuadrant.com www.2ndQuadrant.us
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Dell Perc HX00 RAID controllers: What's inside?
2010-05-07 21:11 Dell Perc HX00 RAID controllers: What's inside? Craig James <craig_james@emolecules.com>
2010-05-09 21:20 ` Re: Dell Perc HX00 RAID controllers: What's inside? Greg Smith <greg@2ndquadrant.com>
@ 2010-05-10 02:39 ` Scott Marlowe <scott.marlowe@gmail.com>
0 siblings, 0 replies; 3+ messages in thread
From: Scott Marlowe @ 2010-05-10 02:39 UTC (permalink / raw)
To: Greg Smith <greg@2ndquadrant.com>; +Cc: Craig James <craig_james@emolecules.com>; pgsql-performance
On Sun, May 9, 2010 at 3:20 PM, Greg Smith <greg@2ndquadrant.com> wrote:
> Craig James wrote:
>>
>> Now that it's time to buy a new computer, Dell has changed their RAID
>> models from the Perc6 to Perc H200 and such. Does anyone know what's inside
>> these? I would hope they've stuck with the Megaraid controller...
>
> The H700 and H800 are both based on the LSI 2180 chipset:
> http://support.dell.com/support/edocs/storage/Storlink/H700H800/en/UG/HTML/chapterb.htm
>
> I'm not sure what's in the H200, but since it does not have a write cache
> you don't want one of those anyway.
>
> Note that early versions of these cards shipped such that you could not use
> non-Dell drives with them. Customer feedback was so overwhelmingly negative
> that last month they announced that the next firmware update will remove
> that restriction:
> http://en.community.dell.com/support-forums/servers/f/906/p/19324790/19689719.aspx#19689719
>
> If I were you, I'd tell Dell that you refuse to make your purchase until
> that firmware release is actually available, such that your system ships
> without that restriction. That's the right thing to do for the protection
> of your company, and it sends the right message to their sales team too:
> this sort of nonsense only reduces their sales.
Well, it's the attitude that really matters, and Dell has shown how
little they think of the people who buy their machines with this move.
I gave up on them when they screwed me royally over 8 quad core cpus
that they couldn't even tell me which of my 1950's could take them,
and they have all the config codes for them. At least if I buy
something with generic mobos in it I can go look it up myself.
Also, going back to the PE16xx series and the adaptec based Perc3 (DI?
not sure which one was) had lockup problems in windows AND linux.
Dell never would take responsibility and ship us different RAID
controllers for some 300 machines we bought. We wound up buying a
handful of LSI based Perc 3 (DC? still not sure of the name) and just
pulling the RAID controller on all the rest to get reliable machines.
Never. Again.
^ permalink raw reply [nested|flat] 3+ messages in thread
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2010-05-07 21:11 Dell Perc HX00 RAID controllers: What's inside? Craig James <craig_james@emolecules.com>
2010-05-09 21:20 ` Greg Smith <greg@2ndquadrant.com>
2010-05-10 02:39 ` Scott Marlowe <scott.marlowe@gmail.com>
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