Boris Kochergin wrote:
Peter C. Lai wrote:
On 2010-02-09 06:37:47AM -0500, Dan Langille wrote:
Charles Sprickman wrote:
On Mon, 8 Feb 2010, Dan Langille wrote:
Also, it seems like
people who use zfs (or gmirror + gstripe) generally end up buying
pricey hardware raid cards for compatibility reasons. There seem to
be no decent add-on SATA cards that play nice with FreeBSD other
than that weird supermicro card that has to be physically hacked
about to fit.
Mostly only because certain cards have issues w/shoddy JBOD
implementation. Some cards (most notably ones like Adaptec 2610A which
was rebranded by Dell as the "CERC SATA 1.5/6ch" back in the day)
won't let you run the drives in passthrough mode and seem to all want
to stick their grubby little RAID paws into your JBOD setup (i.e. the
only way to have minimal
participation from the "hardware" RAID is to set each disk as its own
RAID-0/volume in the controller BIOS) which then cascades into issues
with SMART, AHCI, "triple caching"/write reordering, etc on the
FreeBSD side (the controller's own craptastic cache, ZFS vdev cache,
vmm/app cache, oh my!). So *some* people go with something
tried-and-true (basically bordering on server-level cards that let you
ditch any BIOS type of RAID config and present the raw disk devices to
the kernel)
As someone else has mentioned, recent SiL stuff works well. I have
multiple http://www.newegg.com/Product/Product.aspx?Item=N82E16816132008
cards servicing RAID-Z2 and GEOM_RAID3 arrays on 8.0-RELEASE and
8.0-STABLE machines using both the old ata(4) driver and ATA_CAM. Don't
let the RAID label scare you--that stuff is off by default and the
controller just presents the disks to the operating system. Hot swap
works. I haven't had the time to try the siis(4) driver for them, which
would result in better performance.
That's a really good price. :)
If needed, I could host all eight SATA drives for $160, much cheaper
than any of the other RAID cards I've seen.
The issue then is finding a motherboard which has 4x PCI Express slots. ;)
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-stable
To unsubscribe, send any mail to "[email protected]"
