Date: Tue, 2 Aug 2005 10:23:09 +0100 From: "Justin Finkelstein" <justin@redwiredesign.com> To: =?iso-8859-1?Q?'S=F8ren_Schmidt'?= <sos@FreeBSD.org> Cc: 'Colin King' <ring_06@m202.net>, freebsd-current@FreeBSD.org Subject: RE: Hot-swap SATA and atacontrol Message-ID: <006101c59743$d186c2c0$0b02a8c0@justin> In-Reply-To: <0B4913C3-1FFC-4740-BC24-6D36E6FDAFE8@FreeBSD.org>
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OK, so how can I be sure that the controller DOES support hotswap SATA? I've tested pulling and replacing the drive several times while the = system's on, umounting and remounting it to no ill affect. atacontrol's capability list below shows me lots of info, but I don't = know how that relates to hotswap. one point is that the case comes with a hotswap backplane and I presume = that the Supermicro board that's running the SATA should support hot-swap - = it's running an Intel 6300ESB controller, and afaik that supports hot-swap. ATA channel 1, Master, device ad2: Protocol Serial ATA v1.0 device model ST3160827AS serial number 4MT0J7AA firmware revision 3.42 cylinders 16383 heads 16 sectors/track 63 lba supported 268435455 sectors lba48 supported 312581808 sectors dma supported overlap not supported Feature Support Enable Value Vendor write cache yes yes read ahead yes yes SATA NCQ yes - 31/0x1F SMART yes yes microcode download yes yes security yes no power management yes yes advanced power management no no 65278/0xFEFE automatic acoustic management no no 0/0x00 254/0xFE -----Original Message----- From: S=F8ren Schmidt [mailto:sos@FreeBSD.org]=20 Sent: 02 August 2005 10:11 To: Justin Finkelstein Cc: 'Colin King'; freebsd-current@FreeBSD.org Subject: Re: Hot-swap SATA and atacontrol On 02/08/2005, at 9:42, Justin Finkelstein wrote: > OK; so, what you're saying is that it'll be ok to pull the drive if > I've > unmounted it? > In that case, is the atacontrol step unneccesary? My thinking is =20 > that it > might be, but it's just another step to ensure nothing goes wrong. "depends" If the SATA controller supports hotswap ATA will notice when you yank =20 the drive and detach it properly from the system (ATA wise, if =20 mounted you get into trouble). Also it will autodiscover any SATA =20 driver added, again only on supporting chipsets (and those I know how =20 to handle). - S=F8ren
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