PERC4-DI?

PERC4-DI?

[Robert L. Harris]

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My company is looking at buying some machines with "PERC4-DI" SCSI RAID
controllers.  Poking around the .config file I'm not finding anything
related to this.  Anyone know off the top of their heads what driver
would be used for this controller, any known catastrophic bugs, etc?

Thanks,
  Robert


:wq!
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Robert L. Harris                     | GPG Key ID: E344DA3B
                                         @ x-hkp://pgp.mit.edu 
DISCLAIMER:
      These are MY OPINIONS ALONE.  I speak for no-one else.

Diagnosis: witzelsucht  	

IPv6 = robert@ipv6.rdlg.net	http://ipv6.rdlg.net
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Re: PERC4-DI?

[Arsene Gschwind]

It seems that you're talking about a Dell server. So far I know PERC 
means PowerEdge Enhanced Raid Controller or something similar.
Under the PERC you will find diff. Raid ctrl (Adaptec maybe Mylex) you 
may need to check wich kind of Raid Ctrl it is.
One for sure PERC isn't a RAID Ctrl supplier.

Arsène

Robert L. Harris wrote:

>My company is looking at buying some machines with "PERC4-DI" SCSI RAID
>controllers.  Poking around the .config file I'm not finding anything
>related to this.  Anyone know off the top of their heads what driver
>would be used for this controller, any known catastrophic bugs, etc?
>
>Thanks,
>  Robert
>
>
>:wq!
>---------------------------------------------------------------------------
>Robert L. Harris                     | GPG Key ID: E344DA3B
>                                         @ x-hkp://pgp.mit.edu 
>DISCLAIMER:
>      These are MY OPINIONS ALONE.  I speak for no-one else.
>
>Diagnosis: witzelsucht  	
>
>IPv6 = robert@ipv6.rdlg.net	http://ipv6.rdlg.net
>IPv4 = robert@mail.rdlg.net	http://www.rdlg.net
>  
>

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Re: PERC4-DI?

[Jer Jackson]

Be very careful about the Dell PERC controllers.  The 4-DI is *probably*
a rebranded LSI megaraid, with Dell's firmware.  You *definitely* want
to subscribe to the linux-megaraid-devel@dell.com list.  You well almost
certainly have to recompile your kernel with an up to the minute version
of the megaraid driver.  Problems with the stock driver include server
performance problems, crashes, inability to use clustering.  Many users
complain about the megamon utility, and have reverse engineered the
firmware api and written their own utility to get around the problems. 
The source isn't available AFAIK.  I don't think it will integrate with
linux-ha heartbeat for clustering very well.  Some people have tried
flashing the LSI firmware to fix things.

I am afraid to use it in a database cluster without a *log* of time to
debug.  The EVMS clustering support is getting stable, I am currently in
the testing phase for a postgresql cluster I am building with software
raid/Adaptec SCSI controllers, and shared disk array.

Regards,

Jeremy Jackson

On Fri, 2003-06-06 at 12:37, Robert L. Harris wrote:
> My company is looking at buying some machines with "PERC4-DI" SCSI RAID
> controllers.  Poking around the .config file I'm not finding anything
> related to this.  Anyone know off the top of their heads what driver
> would be used for this controller, any known catastrophic bugs, etc?

-- 
Jer Jackson <jerj@coplanar.net>

Re: PERC4-DI?

[Mark Watts]

On Friday 06 Jun 2003 5:37 pm, Robert L. Harris wrote:
> My company is looking at buying some machines with "PERC4-DI" SCSI RAID
> controllers.  Poking around the .config file I'm not finding anything
> related to this.  Anyone know off the top of their heads what driver
> would be used for this controller, any known catastrophic bugs, etc?

If its anything like the PERC 3 cards, it could be anything from an LSI 
through to an Adaptec card. (PERC = PowerEdge Raid Controler).

I haven't found any major issues with any of them yet, but we don't tend to 
push them as hard as others here - we mainly use them in webservers.

Mark.

RE: PERC4-DI?

[Martin_List-Petersen]

Here is a list:
Perc 2, Perc 3/Si, Perc 3/Di - Adaptec
Perc 2/SC, Perc 3/SC, Perc 3/DC, Perc 3/QC, Perc 4/Di - AMI / LSI

The only server out there with a Perc 4/Di currently is the Dell PowerEdge
2600. The PE2650 has a PERC 3/Di instead (Adaptec).

Have fun.

/Martin

> -----Original Message-----
> From: Mark Watts [mailto:m.watts@mrw.demon.co.uk]
> Sent: den 7 juni 2003 13:05
> To: Linux-Kernel
> Subject: Re: PERC4-DI?
> 
> 
> On Friday 06 Jun 2003 5:37 pm, Robert L. Harris wrote:
> > My company is looking at buying some machines with 
> "PERC4-DI" SCSI RAID
> > controllers.  Poking around the .config file I'm not 
> finding anything
> > related to this.  Anyone know off the top of their heads what driver
> > would be used for this controller, any known catastrophic bugs, etc?
> 
> If its anything like the PERC 3 cards, it could be anything 
> from an LSI 
> through to an Adaptec card. (PERC = PowerEdge Raid Controler).
> 
> I haven't found any major issues with any of them yet, but we 
> don't tend to 
> push them as hard as others here - we mainly use them in webservers.
> 
> Mark.
> 
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