afacli questions

I have a 2650 here with one 33GB drive and PERC 3/Di.  I've just bought three more 33GB drives.  I'm adding two of
these drives to the existing striped drive and will convert them all to RAID 5 if all goes well.   First, I
found that I can only add one of the drives to the existing container one at a time, and have to wait for the
reconfigure to complete before adding the second one.  Well, no problem, but it's taking a while.   Once I
have all three drives in the RAID 5 container, is it possible to use my spare fourth drive as a hot-spare for
*any* of the drives in the RAID 5 container?  

I'm looking at the "container set failover" command, and it's not clear if I can set one physical disk as a
failover in case any one of the RAID 5 disk fails, OR if  that command is for specifying a failover disk or set
of disks as large as the original container.  Does that make sense?

Thanks,

-Hank

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Re: afacli questions

On Thu, 31 Jul 2003, H Eskin wrote:

> I have a 2650 here with one 33GB drive and PERC 3/Di.  I've just bought three more 33GB drives.  I'm adding two
of these drives to the existing striped drive and will convert them all to RAID 5 if all goes well.   First, I
found that I can only add one of the drives to the existing container one at a time, and have to wait for the
reconfigure to complete before adding the second one.  Well, no problem, but it's taking a while.   Once I
have all three drives in the RAID 5 container, is it possible to use my spare fourth drive as a hot-spare for
*any* of the drives in the RAID 5 container?

just fyi, your postings are single lines - it's useful if
you'd consider breaking them up by using line feeds or
suchlike which would make it much more readable and
easier to trim in followups.

> I'm looking at the "container set failover" command, and it's not clear if I can set one physical disk as a
failover in case any one of the RAID 5 disk fails, OR if  that command is for specifying a failover disk or set
of disks as large as the original container.  Does that make sense?

when you use set failover you can set the same disk as a failover
for multiple containers.  it just means whichever container fails
first will get that failover drive.

regards,

-jason

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PowerEdge 6450 connecting to a Dell PowerVault 660 SAN

Re: PowerEdge 6450 connecting to a Dell PowerVault 660 SAN

On Fri, 1 Aug 2003, Harnish, Joe wrote:

> Does any one have some information on configuring LUNS so that a RedHat
> Linux 7.2 can use them?   I am having trouble finding the information I need
> to do this.

it should be fairly straightforward.  at what point are you stuck ?

one thing you may need to do is either recompile your kernel to
probe all luns or use a boot time flag to get it to do so.

regards,

-jason

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RE: PowerEdge 6450 connecting to a Dell PowerVault 660 SAN

Hi,

> > Does any one have some information on configuring LUNS so that a RedHat
> > Linux 7.2 can use them?   I am having trouble finding the information I
> > need to do this.

> one thing you may need to do is either recompile your kernel to
> probe all luns or use a boot time flag to get it to do so.

There is absolutely no need whatsoever to re-compile the kernel to get
RedHat Linux to scan for LUNs. All you need to do is add the following line
to your modules.conf:

options scsi_mod max_scsi_luns=255

Then you need to rebuild your initrd. See this RedHat doc for details:

http://kb.redhat.com/view.php?eid=392

All that the kernel compilation option for 'probe all LUNs' does is simply
change the default for the max_scsi_luns parameter, as evidenced by this
snippet I found in the Linux kernel docs:

> max_scsi_luns=
> -------------------
>
> Syntax: max_scsi_luns=<n>
>
> Sets the maximum number of LUNs (logical units) of SCSI devices to
> be scanned. Valid values for <n> are between 1 and 8. Default is 8 if
> "Probe all LUNs on each SCSI device" was selected during the kernel
> configuration, else 1.

Pay no attention to the stated maximum value of 8. Two separate RedHat docs
I found say to set it to either 128 or 255. Anyway, the modinfo description
for that parameter says "should be between 1 and 2^32-1", so I guess it's
whatever the system will handle.

Regards,

Basil Hussain
---------------------------------------
Internet Developer, Kodak Weddings
E-Mail: basil.hussain <at> kodakweddings.com

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local_bh_enable()

Hi,

When trying the lateste debian dellomsa-driver package (from the
Domsch.com site), it refuses to install. After some searching and
hacking, I noticed the esm.o compiles with errors, and refuses to load
because of unresolved symbols. It can't seem to find local_bh_enable()
and local_bh_disable(), which are defined in
/usr/src/linux/include/asm/softirq.h.

Any suggestions?

Vriendelijke groeten,
Frank Louwers

--

-- 
Openminds bvba                www.openminds.be
Tweebruggenstraat 16  -  9000 Gent  -  Belgium

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RE: PowerEdge 6450 connecting to a Dell PowerVault 660 SAN

RE: Dell at LinuxWorldExpo in San Francisco Aug 4-7

Matt,

 Get a group photo please at the conference of your team and 
 the paparazzi!

 And then put it on the Dell Linux website.  So many conferences 
 that I don't get to attend, so I never get to see the faces behind 
 the genius.  You could put a few more pix too of the rest of
 the conference for us poor folk that can't attend. 

 

Tim

--
Tim Schaefer
Project Manager, Data Base Administration
Data Warehouse Corporation, Boca Raton, FL

-----Original Message-----
From: Matt_Domsch <at> dell.com [mailto:Matt_Domsch <at> dell.com] 
Sent: Thursday, July 31, 2003 6:53 PM
To: linux-poweredge <at> dell.com
Subject: Dell at LinuxWorldExpo in San Francisco Aug 4-7

Dell is a Platinum sponsor of the LinuxWorldExpo in San Francisco next
week, Aug 4-7.  I'll be in the Dell booth (it's huge, you can't miss it)
parts of Tuesday, Wednesday, and Thursday.  If you're there, stop by and
introduce yourself, and pick up some goodies.

Thanks,
Matt

--

-- 
Matt Domsch
Sr. Software Engineer, Lead Engineer
Dell Linux Solutions www.dell.com/linux
Linux on Dell mailing lists  <at>  http://lists.us.dell.com

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Re: MegaMonitor

And 1.18h is the oldest that is compatible with megamon. 
-eric wood

JACOB_LIBERMAN <at> dell.com wrote:
> Update to megaraid 1.18i or higher
> From: Davis, Jeff (Houston) [mailto:jdavis <at> hess.com]
> > I keep getting these megamon msgs
> > Every minute or so and they tend to fill up my inbox

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Monitoring Hardware RAID on Linux

I have a PowerEdge 2650 connected to a PowerVault using a PERC 3/DC (a 
MegaRaid controller).

It also has a PERC 3/DI for its internal disks...

(Too much info: running database, internal disks have the OS and DB 
software, external has the DB data itself).

The box is running Red Hat 8.0.  I'm running raidmon, and I have dellmgr 
on it, etc...on startup, raidmon and megadev are run.

This morning, I went down to the machine room to look at something else, 
and saw that two of my 5 drives were blinking orange in the PowerVault. 
  The failure is a different story: my concern is that I didn't know.

When there are disk failures on my RAIDs (both Award and AMI), I'd 
really like to know, like ASAP.  I've never figured out the "right" way 
to do that.  And, in fact, nothing in the logs on the box showed the 
failures...dellmgr does, of course, but I can't be manually checking all 
the time.

I've looked for this info, and have never really found a good answer...

What does everyone do to make sure their RAIDs don't need help?

Thanks...

Kevin

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