If you're building from scratch, please choose nearline/midline SAS disks
instead of SATA if you're looking for capacity. For detailed reasoning,
see: http://serverfault.com/a/331504/13325

For the server, I've had great success with HP ProLiant systems, focusing
on the DL380 G6/G7 models. If you can budget 4U of rackspace, the DL370 G6
is a good option that can accommodate 14LFF or 24 SFF disks (or a
combination). I've built onto DL180 G6 systems as well. If you do the
DL180 G6, you'll need a 12-bay LFF model. I'd recommend a Lights-Out 100
license key to gain remote console. The backplane has a built-in SAS
expander, so you'll only have a single 4-lane SAS cable to the controller.
I typically use LSI controllers. In the DL180, I would spec a LSI 9211-4i
SAS HBA. You have room to mount a ZIL or L2Arc internally and leverage the
motherboard SATA ports. Otherwise, consider a LSI 9211-8i HBA and use the
second 4-land SAS connector for those.

See: http://www.flickr.com/photos/ewwhite/sets/72157625918734321/ for an
example of the DL380 G7 build.

Edmund White

On 12/17/11 12:24 AM, "Hung-Sheng Tsao (laoTsao)" <laot...@gmail.com>

>imho, if possible pick sas 7200 hdd
>no hw-raid for ZFS
>mirror and with ZIL and good size memory
>Sent from my iPad
>On Dec 16, 2011, at 17:36, t...@ownmail.net wrote:
>> I could use some help with choosing hardware for a storage server. For
>> budgetary and density reasons, we had settled on LFF SATA drives in the
>> storage server. I had closed in on models from HP (DL180 G6) and IBM
>> (x3630 M3), before discovering warnings against connecting SATA drives
>> with SAS expanders.
>> So I'd like to ask what's the safest way to manage SATA drives. We're
>> looking for a 12 (ideally 14) LFF server, 2-3U, similar to the above
>> models. The HP and IBM models both come with SAS expanders built into
>> their backplanes. My questions are:
>> 1. Kludginess aside, can we build a dependable SMB server using
>> integrated HP or IBM expanders plus the workaround
>> (allow-bus-device-reset=0) presented here:
>> http://gdamore.blogspot.com/2010/12/update-on-sata-expanders.html ?
>> 2. Would it be better to find a SATA card with lots of ports, and make
>> 1:1 connections? I found some cards (arc-128, Adaptec 2820SA) w/Solaris
>> support, for example, but I don't know how reliable they are or whether
>> they support a clean JBOD mode.
>> 3. Assuming native SATA is the way to go, where should we look for
>> hardware? I'd like the IBM & HP options because of the LOM & warranty,
>> but I wouldn't think the hot-swap backplane offers any way to bypass the
>> SAS expanders (correct me if I'm wrong here!). I found this JBOD:
>> http://www.pc-pitstop.com/sata_enclosures/sat122urd.asp  I also know
>> about SuperMicro. Are there any other vendors or models worth
>> considering?
>> Thanks!
>> _______________________________________________
>> zfs-discuss mailing list
>> zfs-discuss@opensolaris.org
>> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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