From: L. Mark Stone (lmstone_at_rnome.com)
Date: Wed Feb 16 2005 - 14:47:50 CET
From: "L. Mark Stone" <lmstone@rnome.com> Date: Wed, 16 Feb 2005 08:47:50 -0500 Message-Id: <200502160847.50977.lmstone@rnome.com> Subject: Re: [suse-sles-e] File systems and SCSI Arrays...
On Wednesday, February 16, 2005 03:28 am, Anders Norrbring wrote:
> > On Tuesday, February 15, 2005 01:28 pm, Anders Norrbring wrote:
> > > The disk space is located on a Compaq Smart Array 3200
> > > controller. The controller takes care of everything regarding
> > > RAID, so that part doesn't load the Linux system.
> > > The system loads the driver cpqarray in initrd, everything seems
> > > fine so far.
> > >
> > > The problem is that when the file system gets a load, for example
> > > if I copy large files to the volume, it takes forever to complete
> > > and the system seems hanged. After 10-90 seconds, it continues
> > > its work. If I have one window open with 'top', that too freezes
> > > during this period.
> > >
> > > Since it's SuSE SLES9, I formatted everything with reiserfs, my
> > > thinking wass that this may be the problem, but then I tried with
> > > XFS as well, just the same problem.. I'm just guessing.. If
> > > someone can clear things up, I'd be grateful..
> >
> > Anders,
> >
> > I've got a SLES9 box running on an old Compaq 6400r with a
> > SmartArray 3200 controller and I see none of the issues you are
> > having. Reiser shouldn't make a difference (although I now prefer
> > ext3...)
> >
> > If your box is a Compaq box, did you SmartStart it before
> > installing SuSE? (The choice of OS to be installed sets the BIOS
> > up correctly.)
> >
> > Also, check your boot options in grub and look for the "elevator= "
> > parameter. If it is set to "as", try changing it to "cfq" or
> > "deadline" and see what happens after a reboot. (My Compaq has the
> > parm set to "cfq"; as I understand it, RAID controllers will see
> > poorer performance if the parm is set to "as".)
>
> Thanks Mark,
>
> No, this isn't in a Compaq system, so I can't use the SmartStart CD..
> In my grub's menu.lst, I have:
>
> kernel (hd0,1)/boot/vmlinuz root=4802 vga=0x31a splash=silent
> resume=/dev/ida/c0d0p1 showopts
>
> So, there's no "elevator" at all set, perhaps that's the problem... I
> really haven't spent any time to study kernel and boot options, since
> I haven't found any documentation at all regarding this old SA 3200
> controller. I've just moved it from an old Compaq server that ran
> W2k..
>
> I guess I need to find boot/kernel options that can have effect on
> the Smart Array, I just don't know where to start... I'll try to set
> "elevator=cfg" in my grub as well, perhaps it can do some good.. :)
>
> Later,
> Anders Norrbring
> Norrbring Consulting
Anders,
Here's the boot line from my Compaq server's SLES9 kernel grub setup.
Note that the elevator line is "cfq" not "cfg"! Our config lines look
verrry similar, but YMMV...
Best regards,
Mark
(hd0,1)/boot/vmlinuz root=4802 vga=0x317 selinux=0 splash=silent
resume=/dev/ida/c0d0p1 elevator=cfq showopts
-- _________________________________________________________ A Message From... L. Mark Stone Reliable Networks of Maine, LLC "We manage your network so you can manage your business." 477 Congress Street Portland, ME 04101 Tel: (207) 772-5678 Web: http://www.rnome.com --------------------------------------------------------------------- To unsubscribe, e-mail: suse-sles-e-unsubscribe@suse.com For additional commands, e-mail: suse-sles-e-help@suse.com
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