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

[George Wilson]

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";

I'll be sending this out for illumos review soon.

- George