[OpenIndiana-discuss] Hitachi 4 TB disks + HP Microserver + OI 151 + ZFS

[Richard Elling]

On Apr 29, 2012, at 11:45 AM, George Wilson wrote:

> 
> On Apr 29, 2012, at 1:28 PM, Roy Sigurd Karlsbakk wrote:
> 
>>>> Also, I posted a bug report for it here
>>>> https://www.illumos.org/issues/2663
>>> 
>>> Thanks :-). We can now track the progress of the OI-specific
>>> discussion about this issue.
>> 
>> Seems the old post about the initial patch is here https://www.illumos.org/issues/453
>> 
>> After som discussion on #openindiana (irc.freenode.net), it seems the best would perhaps be to port the ashift flag available in Linux. Also, some SSDs might need ashift=13 for optimal performance…
>> 
>> Vennlige hilsener / Best regards
>> 
>> roy
>> --
>> Roy Sigurd Karlsbakk
>> (+47) 98013356
>> roy at karlsbakk.net
>> http://blogg.karlsbakk.net/
>> --
>> I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk.
>> 
>> _______________________________________________
>> OpenIndiana-discuss mailing list
>> OpenIndiana-discuss at openindiana.org
>> http://openindiana.org/mailman/listinfo/openindiana-discuss
> 
> Speaking of 4K sectors, I've taken a slightly different approach that fixes this outside of ZFS. The idea is to allow sd to override the physical-block-size which ZFS will pick up. The way this works is you can specify the Vendor/Product id in sd.conf. Here's an example:
> 
> sd-config-list = "NETAPP  LUN, "physical-block-size:4096";

This is the preferred solution and there are several implementations running
around in various stages of test/release/acceptance. I look forward to getting this 
upstream :-)
 -- richard

--
ZFS Performance and Training
Richard.Elling at RichardElling.com
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