RE: "Transparent" IDE RAID controller
SWWWEET. I knew this was in my bookmarks somewhere
Check this out;
Linux IDE-RAID Notes
http://www.research.att.com/~gjm/linux/ide-raid.html
# Jesse Molina lanner, Snow
# Network Engineer Maximum Charisma Studios Inc.
# lanner@maximumcharisma.com 1.303.432.0286
# end of sig
> -----Original Message-----
> From: Jason Lim [mailto:maillist@jasonlim.com]
> Sent: Monday, November 05, 2001 4:28 PM
> To: Debian-Isp
> Subject: "Transparent" IDE RAID controller
>
>
> Actually... come to think of it... I wonder if ANY RAID
> controller does
> the following...
>
> - appears to be just ONE hard disk (eg. hda) to the server
> - actually has 2 or more hard disks connected to the RAID
> controller (but
> only shows up as one to the OS)
> - if in RAID1 mode (mirroring), if one disk fails, the controller
> AUTOMATICALLY uses the remaining hard disk(s), and perhaps a LED could
> light up, indicating a problem with a disk. Once a new disk
> is connected,
> the RAID controller automatically rebuilds
> - if in other modes, does 99% of operations by itself with no
> intervention
> required by the OS (auto rebuilds, etc.) except manual things like
> replacing a dead drive
>
> This would mean the RAID controller is, more or less, OS
> independent, and
> requires no OS level software to make it run, thus making it a
> "transparent" RAID controller.
>
> I've pondered this for a while, and i'm certainly no hardware
> raid expert
> but it appears like a workable and doable solution.
>
> So, for example if i mounted hda, the controller would transparently
> activate both the drives (if you are running raid1 with 2
> hds). A cp to
> hda would tell the controller to do a normal cp to hda on the
> OS level,
> but the "transparent" hardware raid controller would know that it is
> running in raid1 mode and automatically cp the file(s) to
> both hard disks.
> After cping the file to both hard disks, it would tell the OS, like a
> regular hd controller, that it had finished the operation,
> and thus the OS
> would not need to know that the file(s) were actually copied to 2
> different hard disks.
>
> If there is such a solution on the market... I haven't seen it. But
> perhaps you could tell me WHY there is no such product when
> it seems like
> it would solve many problems with software/hardware
> incompatibilities, and
> would solve many many admin's troubles?
>
> Failing that... is there ANY product on the market that does plain
> hardware level mirroring (for IDE)? What we do now is
> (essentially) cp hda
> to hdb every 24 hours, so in the case of a major hd failure on hda, we
> simply swap hdb over to hda and continue running (but with stuff that
> could be up to 24 hours old). What would a solution be to
> make it so hdb
> is never so out of date with hda, or perhaps even a LIVE copy
> (considering
> the above proposed transparent hardware raid, and without
> causing massive
> load during the day)?
>
> I think this is something many admins have to consider... what is YOUR
> solution to this?
>
> Sincerely,
> Jason
>
> ----- Original Message -----
> From: "Jesse Molina" <lanner@maximumcharisma.com>
> To: <noc@cshore.com>; "Debian-Isp" <debian-isp@lists.debian.org>
> Sent: Tuesday, November 06, 2001 9:41 AM
> Subject: RE: hardware raid
>
>
> >
> > If you are looking for Ultra 160 SCSI, the Mylex AcceleRAID
> 170 may be
> > something that you want. I recent purchased about 30 of
> these cards for
> a
> > RAID 1 solution for some rack servers. They work pretty
> good. RAID0,
> > RAID1, Spanning (JBOD), RAID5. You can backup and restore the
> controller
> > configuration to a floppy disk, the BIOS interface is
> fairly nice and
> > simple. Rebuilding takes awhile, but no big deal.
> >
> > They also make an AcceleRAID 170LP, a low-profile PCI card. Pretty
> neat.
> >
> > AMI recently sold all of their RAID card business to LSI Logic, this
> making
> > getting some of the AMI cards a bit difficult right now.
> Otherwise, I
> would
> > also recommend the AMI Express 500.
> >
> > If you are looking for IDE, I have no comment there.
> >
> >
> >
> > # Jesse Molina lanner, Snow
> > # Network Engineer Maximum Charisma Studios Inc.
> > # lanner@maximumcharisma.com 1.303.432.0286
> > # end of sig
> >
> >
> > > -----Original Message-----
> > > From: Andrew Kaplan [mailto:noc@cshore.com]
> > > Sent: Monday, November 05, 2001 3:20 PM
> > > To: Debian-Isp
> > > Subject: hardware raid
> > >
> > >
> > > I'm looking for a good hardware raid 1 (mirroring) solution
> > > for Debian. Will
> > > the promise cards work with Debian or is there a better
> > > solution thanks.
> > >
> > > Andrew P. Kaplan
> > > Network Administrator
> > > CyberShore, Inc.
> > > http://www.cshore.com
> > >
> > > "I couldn't give him advice in business and he couldn't give me
> > > advice in technology." --Linus Torvalds, about why he wouldn't
> > > be interested in meeting Bill Gates.
> > >
> > >
> > >
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Craigsc [mailto:craigsc@zdata.co.za]
> > > > Sent: Monday, November 05, 2001 4:17 AM
> > > > To: Debian-Isp
> > > > Subject: VIM
> > > >
> > > >
> > > > H
> > > >
> > > >
> > > > --
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