Using GTP and glabel for ZFS arrays

Charles Sprickman spork at
Thu Jul 22 08:03:06 UTC 2010

On Thu, 22 Jul 2010, Dan Langille wrote:

> On 7/22/2010 3:30 AM, Charles Sprickman wrote:
>> On Thu, 22 Jul 2010, Dan Langille wrote:
>>> On 7/22/2010 2:59 AM, Andrey V. Elsukov wrote:
>>>> On 22.07.2010 10:32, Dan Langille wrote:
>>>>> I'm not sure of the criteria, but this is what I'm running:
>>>>> atapci0:<SiI 3124 SATA300 controller> port 0xdc00-0xdc0f mem
>>>>> 0xfbeffc00-0xfbeffc7f,0xfbef0000-0xfbef7fff irq 17 at device 4.0 on
>>>>> pci7
>>>>> atapci1:<SiI 3124 SATA300 controller> port 0xac00-0xac0f mem
>>>>> 0xfbbffc00-0xfbbffc7f,0xfbbf0000-0xfbbf7fff irq 19 at device 4.0 on
>>>>> pci3
>>>>> I added ahci_load="YES" to loader.conf and rebooted. Now I see:
>>>> You can add siis_load="YES" to loader.conf for SiI 3124.
>>> Ahh, thank you.
>>> I'm afraid to do that now, before I label my ZFS drives for fear that
>>> the ZFS array will be messed up. But I do plan to do that for the
>>> system after my plan is implemented. Thank you. :)
>> You may even get hotplug support if you're lucky. :)
>> I just built a box and gave it a spin with the "old" ata stuff and then
>> with the "new" (AHCI) stuff. It does perform a bit better and my BIOS
>> claims it supports hotplug with ahci enabled as well... Still have to
>> test that.
> Well, I don't have anything to support hotplug.  All my stuff is internal.

The frankenbox I'm testing on is a retrofitted 1U (it had a scsi 
backplane, now has none).

I am not certain, but I think with 8.1 (which it's running) and all the 
cam integration stuff, hotplug is possible.  Is a special backplane 
required?  I seriously don't know...  I'm going to give it a shot though.

Oh, you also might get NCQ.  Try:

[root at h21 /tmp]# camcontrol tags ada0
(pass0:ahcich0:0:0:0): device openings: 32


> -- 
> Dan Langille -

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