FreeBSD 8.0-BETA4 IBM ServerRaid 8k issues

Artis Caune artis.caune at
Fri Sep 11 19:17:01 UTC 2009

2009/9/11 George Mamalakis <mamalos at>:
> Artis, and the rest of the guys, thank you all for your answers.
> Ivan, I was thinking of using one of the techniques you mention (create two
> volumes, install fbsd on one of them, and use GTP on the second drive), but
> I was wondering if there would be any "incompatibility" issues with tools
> like df, etc.
> In case I do this (since I only have sata drives), will I end up with
> degraded disk performance? Theoretically I assume not, since 1.5 Gbps is
> adequate for *each* disk (it calculates to something like ~178MBps); but
> have you tried it on your disks, and everything works OK since (along with
> performance)?

We didn't tested speed much, but looks like you loose few MB (very
quick tests with dd). We are hosting 40K+ mailboxes, on ZFS :), so we
are more random-read/seek bound than Gbps bound.
But yes, we are running at 1.5Gbps and are happy stable/7 ZFS v6 users
and after few weeks we are migrating to stable/8 ZFS v13 with GPT and

Artis Caune

    Everything should be made as simple as possible, but not simpler.

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