Re: 6.0 on Dell 1850 with PERC4e/DC RAID?
- From: Scott Mitchell <scott+lists.freebsd@xxxxxxxxxxxxxxx>
- Date: Fri, 6 Jan 2006 23:38:57 +0000
On Fri, Jan 06, 2006 at 10:35:46AM -0500, Vivek Khera wrote:
>
> On Jan 5, 2006, at 5:41 PM, Scott Mitchell wrote:
>
> >I may be getting a new Dell PE1850 soon, to replace our ancient CVS
> >server
> >(still running 4-STABLE). The new machine will ideally run 6.0 and
> >have a
> >PERC4e/DC RAID card - the one with battery-backed cache. This is
> >listed as
>
> I have an 1850 with the buil-in PERC 4e/Si since all I needed was the
> RAID1 mirror of the internal drives. It works extremely well, and
> the speed is quite good.
We'll only be mirroring the internal drives too for now - the 4e/DC seems
to be the only RAID option on the 1850 with battery-backed cache, and
doesn't cost much more for the extra peace-of-mind.
> As for notices of when the drives go bad, under 4.x I've had disk
> failures with the amr driver (different PERC cards) and not gotten
> any such notices in the syslog that I recall.
That's a pity. Maybe Doug was thinking of one of the aac(4) based PERC
cards? Still, something I can run out of cron to check the array status
should be fine.
> I did find a program
> posted to one of the freebsd lists called 'amrstat' that I run
> nightly. It produces this kind of output:
>
> Drive 0: 68.24 GB, RAID1 <writeback,no-read-ahead,no-adaptative-
> io> optimal
>
> If it says "degraded" it is time to fix a drive. You just fire up
> the lsi megaraid tools and find out which drive it is.
>
> If you go to the LSI download area, they have one file for FreeBSD,
> which is labeled the driver. In that zip file is also the management
> software for freebsd. You'll want that. Personally, I like the
> "MEGAMGR" software which was released for freebsd 4.x and mimics the
> BIOS' interface in a terminal window.
There's a port of the management software now: sysutils/megarc
> The rebuild on LSI controllers is set to automatic on the dells as
> default. It just works as expected.
Cool.
> Overall, I'm a big fan of the LSI cards and the amr driver...
>
> Unfortunately for me, the latest equipment I just got only takes low-
> profile cards, and LSI doesn't offer a dual channel RAID card in low-
> profile configuration... so I need to look at adaptec.
This is on your x4100? Nice machine. We have a v20z with dual Opteron
270s that I totally love. Looking at getting an x4100 too... sadly these
are product development machines so they'll be running RedHat and Solaris.
Doesn't the x4100 have h/w RAID built in? Or does that not work with
FreeBSD?
Scott
--
===========================================================================
Scott Mitchell | PGP Key ID | "Eagles may soar, but weasels
Cambridge, England | 0x54B171B9 | don't get sucked into jet engines"
scott at fishballoon.org | 0xAA775B8B | -- Anon
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