Date: Thu, 15 Dec 2011 20:19:58 +1100 From: Jan Mikkelsen <janm-freebsd-hackers@transactionware.com> To: Borja Marcos <borjam@sarenet.es> Cc: freebsd-hackers@freebsd.org, Hugo Silva <hugo@barafranca.com> Subject: Re: mfi (Dell H700) + hot swapping doesn't appear to work with RC1 Message-ID: <2EA3FFF4-E6A2-4371-8891-26E99C551C67@transactionware.com> In-Reply-To: <9317551F-CBE0-4368-B798-498E58E240B2@sarenet.es> References: <4EE8A005.5030607@barafranca.com> <9317551F-CBE0-4368-B798-498E58E240B2@sarenet.es>
next in thread | previous in thread | raw e-mail | index | archive | help
On 15/12/2011, at 2:16 AM, Borja Marcos wrote: >=20 > On Dec 14, 2011, at 2:09 PM, Hugo Silva wrote: >=20 >> Hello, >>=20 >> First of all apologies if this has been fixed in RC3. I set this = server >> up with mfsbsd, which is RC1, and didn't get to update the system = yet. >>=20 >> This box has 6 hdds, a 2-mirror zpool was set up as the root pool, = with >> 2 spares. >>=20 >> While testing hot swapping I noticed that while the controller = detects >> disk removal/insertion, the zpool will never recover. The problem = seems >> to be deeper than ZFS, as disklabel/fdisk/etc also fail on the >> removed-and-reinserted disk. >>=20 >> At the ZFS level, doing a zpool clear yields more errors on the = removed >> disk; rebooting becomes the only option to make the pool healthy = again. >>=20 >>=20 >> Is this normal? Did I miss any step? >=20 > I assume that you have tried to use the H700 as a "JBOD" card, = defining logical volume for each hard disk. >=20 > The problem is: that gorgeous, fantastic, masterful, Nobel award = candidate card, has a wonderful behavior in that case. If you extract = one of the disks, the logical volume associated to it is invalidated. = So, you insert a replacement disk, and the card refuses to recognize the = volume. What is even worse, in order to recover it's mandatory to reboot = the complete system *AND* go through the RAID configuration utility. >=20 > That's the problem. The card refuses to work as a simple disk = controller without frills, and the frills get in the way. >=20 > To summarize: it isn't FreeBSD's fault, no matter which version you = use. It's a "feature" coming directly from the geniuses who designed the = card. (Sending again to avoid moderation.) Hugo: You missed a step. Borja: No reboot required. For the mfi controllers I have been testing recently (MegaRAID 9261-8i), = you need to install the sysutils/megacli port, and use that to clear the = "foreignness" of the disk you just added. Something like: MegaCli -CfgForeign -Clear -a0 You should be able to then recreate it as a JBOD device, and progress = through whatever higher level recovery you need to do. Regards, Jan Mikkelsen
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?2EA3FFF4-E6A2-4371-8891-26E99C551C67>