Messages in this thread | | | Date | Mon, 22 Mar 2004 14:29:44 -0500 | From | Jeff Garzik <> | Subject | Re: ATARAID/FakeRAID/HPTRAID/PDCRAID as dm targets? |
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Carl-Daniel Hailfinger wrote: > Wilfried Weissmann wrote: > >>Arjan van de Ven wrote: >> >> >>>On Sat, Mar 20, 2004 at 07:23:01PM -0700, Kevin P. Fleming wrote: >>> >>> >>>>Jeff Garzik wrote: >>>> >>>> >>>> >>>>>So go ahead, and I'll lend you as much help as I can. I have the >>>>>full Promise RAID docs, and it seems like another guy on the lists >>>>>has full Silicon Image "medley" RAID docs... > > > Jeff: May I request your docs?
Unfortunately not, but I can get you in touch with somebody at Promise who can. They're definitely interested in working with the open source community. Not public...
> Well, I had something in mind which closely resembles the ataraid-detect > tool Thomas Horsten (Medley RAID) suggested. > > http://lists.infowares.com/archive/medley/2004-February/000001.html > > OK, I was even aiming for less: Write an ataraid-detect tool which outputs > the correct mapping for dmsetup. If I manage to write it generically > enough, it can be integrated into evms or used as a standalone program, > whatever you like.
That's pretty nice. Very Unix-ish: provide a small, pluggable piece that does one thing, and does it well.
>>1. its all within evms >>There is no need for additional tools required to setup the volume >>(thinking about installers and initrd...). > > > The EVMS sample initrd is HUGE. (2.1 MB) I'm aiming for a initrd size of > less than 1/10 of that.
Cool :)
>>4. nice clickety-click user interface >>Especially useful for lazy people like me. ;) > > > I prefer the "no user interface" approach. But then again, I'm biased.
Agreed -- a minimal implementation is needed first anyway. The BIOS of these proprietary RAID thingies typically provides the user interface.
>>What do you think? > > > I'll use your work as a foundation. First step is integrating detection > for non-HPT arrays. If the code looks too messy after that, I still can > refactor it. > > As soon as I have some code to get at least PDCRAID working, I'll post again.
Feel free to ask me questions, too.
Jeff
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