Date: Sun, 13 Jan 2008 10:37:27 +0000 From: Dieter <freebsd@sopwith.solgatos.com> To: Adriaan de Groot <groot@kde.org> Cc: freebsd-hardware@freebsd.org Subject: SiI 3124 and Re: External SATA JBOD Message-ID: <200801131837.SAA22180@sopwith.solgatos.com> In-Reply-To: Your message of "Sun, 13 Jan 2008 11:46:17 %2B0100." <200801131146.22683.groot@kde.org>
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>> I am thinking about adding an external Case with 4 haddrives to my >> server that should not be running 247. In ancient times this was done >> via SCSI and simply worked (turn on, rescan SCSI, mount). I suppose you could still use SCSI today if you don't mind paying $C$I price$. If the only reason for wanting an external box is the ability to power the drives down, you could make a custom power cable with a switch inline. There are panels with switches that fit standard 3.5" bays, so you don't have to do any metalwork, just a little soldering. If an additional SATA drive appears, does the FreeBSD kernel notice and handle it (like USB) ? Is a rescan needed (like SCSI) ? A reboot? >> I already have an external drive connected via USB, but I am not able to >> read SMART using this link. Another issue with the USB bridges is you can't turn the disk's write cache on and off. :-( Do firewire bridges allow access to the write cache control bit, and SMART data? How is FreeBSD support for firewire disks? > I did something similar with an Addonics 4-drive housing and a SiI 3124 based > SATA controller. That meant writing some of the driver for the 3124, but it > was fun (and the Soren did the heavy lifting). Does this mean that the SiI 3124 device driver is working? Is it "ready for prime time"? I've been watching -hardware and -drivers but haven't seen anything. > I don't think PM is supported yet. Certainly not in 6-STABLE, possibly in 7. > I remember Soren was delaying PM work until NCQ was in; So NCQ isn't ready yet? :-( Are there *any* controllers with working NCQ support? > I had PM support > without NCQ in 6-STABLE at one point, but that severely limits the total > throughput of the drives. I would think that SATA-300 could support 4 drives without slowing them down, is there some other bottleneck?
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