Date: Tue, 22 Mar 2016 11:42:38 -0700 From: Doug Ambrisko <ambrisko@ambrisko.com> To: Garrett Wollman <wollman@csail.mit.edu> Cc: freebsd-stable@freebsd.org Subject: Re: Hangs with mrsas? Message-ID: <20160322184238.GA58487@ambrisko.com> In-Reply-To: <22237.53738.967189.432979@khavrinen.csail.mit.edu>
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On Mon, Mar 07, 2016 at 02:09:30PM -0500, Garrett Wollman wrote:
| I have a new Dell server with a typical Dell hardware RAID. pciconf
| identifies it as "MegaRAID SAS-3 3008 [Fury]"; mfiutil reports:
|
| mfi0 Adapter:
| Product Name: PERC H330 Adapter
| Serial Number: 5AT00PI
| Firmware: 25.3.0.0016
| RAID Levels:
| Battery Backup: not present
| NVRAM: 32K
| Onboard Memory: 0M
| Minimum Stripe: 64K
| Maximum Stripe: 64K
|
| Since I'm running ZFS I have the RAID functions disabled and the
| drives are presented as "system physical drives" ("mfisyspd[0-3]" when
| using mfi(4)). I wanted to use mrsas(4) instead, so that I could have
| direct access to the drives' SMART functions, and this seemed to work
| after I set the hw.mfi.mrsas_enable tunable, with one major exception:
| all drive access would hang after about 12 hours and the machine would
| require a hard reset to come back up.
|
| Has anyone seen this before? The driver in head doesn't appear to be
| any newer.
You could try:
https://people.freebsd.org/~ambrisko/mrsas.patch
and once you have that then:
https://people.freebsd.org/~ambrisko/mrsasutil.patch
you can use mrsasutil with it (ie. mfiutil).
Please let me know if that helps. It's based on -current and helped
with things here. We also saw a performance increase on RAID controllers
without cache but that could be do to the ioctl path changes I did since
we do a lot of state queries via that. In theory the syspd from mfi(4)
could be made to work via da(4) but that isn't what LSI did.
Thanks,
Doug A.
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