Date: Fri, 16 Mar 2001 15:19:06 -0800 From: Kent Stewart <kstewart@urx.com> To: so@server.i-clue.de Cc: SF <lists@stevenfettig.com>, Freebsd-Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Hot swap mount compatible with FreeBSD? Message-ID: <3AB29F6A.C2F4AFD4@urx.com> References: <LOBBKFILCMGGNDCBBCELEEIJDOAA.lists@stevenfettig.com> <3AB2497C.C8B33D32@i-clue.de>
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It is coming. I have been following a new module called atacontrol on -hackers. It is just being developed by SOS on -current. Requirements to use it may fall into pcmcia ide devices but I found it very interesting. Kent Christoph Sold wrote: > > SF schrieb: > > > > <snip> > > > I don't understand the question. About every swap solution will work for > > > you. It's up to you to make sure the drive is not mounted the moment you > > > swap drives. > > > > > > HTH > > > -Christoph Sold > > > > Well, I found an answer - I think - to my own question after more digging > > (sorry I didn't see this before). FreeBSD doesn't seem to support > > hot-swapping per se. But, the suggestion you gave of making sure the drive > > was unmounted the moment it is swapped seems to indicate that I am really in > > need of a hardware setup that will allow drives to be swapped in and out of > > the chassis (and as long as it is not mounted at that time, this should > > cause no problems with the OS) - like the way a CD-Rom disc is inserted and > > removed. That leads me, however, back to an original question - is there > > any specific hardware that supports hot swapping (i.e. controller, rails, > > etc. from someone like Adaptec, etc) that has been used in a FreeBSD box > > successfully - I have found solutions that should work with MS machines, but > > I don't know about FreeBSD/*nix functionality? > > Well, thats a different questions altogether. Yes, there is some > specification about hot-swappability -- you just cannot disconnect an > IDE bus without disturbing ongoing transfers. Thus, IDE drives a not > hot-swappable. This leaves SCSI, and the fact you have to be able to > power down the drive separately _before_ pulling it out of the bay. > > Some solutions exist, but they are very hard to find. I've ordered some > parts made by Lindy in Germany about three months ago. They're not yet > here -- and I live in Germany. Seems those boxes are built on large > orders only. > > For hot swapability, I'd go the IDE to SCSI Raid alley. Just one > external box allows you to plug cheap IDE drives into, and attaches via > fast SCSI to you BSD box. > > HTH > -Christoph Sold > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Kent Stewart Richland, WA mailto:kbstew99@hotmail.com http://kstewart.urx.com/kstewart/index.html FreeBSD News http://daily.daemonnews.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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