[aclug-L] Re: Hardware vs. software RAID, etc

["Ryan Hunt" <rhunt@xxxxxxxxxxx>]

CPBK is rather fast, I used it to mirror 2 40gb harddrives and once the
inital mirroring was in place it only took a min or two for it to run every
day...

I dont know much about software-raid but I do know you need at least a boot
partition that is not raided for it to work

-Ryan
----- Original Message -----
From: "Jonathan Hall" <jonhall@xxxxxxxxxxxx>
To: <discussion@xxxxxxxxx>
Sent: Monday, October 29, 2001 11:22 PM
Subject: [aclug-L] Re: Hardware vs. software RAID, etc


>
> On Mon, Oct 29, 2001 at 10:07:45PM -0600, Ryan Hunt wrote:
> >
> > I will assume, 2 drives = Raid1 and we know raid1 is mirroring
> >
> > If all you want is mirroring then I wouldent bother with an IDE Raid
> > Controller (YUK!) I think a software raid would be fine for this
> > instance..
>
> How difficult is it to configure Linux to boot from a software raid
device?
> Or would I need to set up a smallish partition at the beginning of the
drive
> for booting?
>
> What is a standard configuration when doing RAID?  Should the entire
system
> be run on my 80gb RAID?  Or should I put a smaller drive in the system,
too,
> for swap, booting, etc?
>
>
> > Instead of raid you might consider the same path I use for mirroring
> > harddrives.. search freshmeat for a program called "cpbk"
> > Its a great little tool that compares directories and updates the mirror
> > drive (via mount) with any files that have updated, added, and deleted..
>
> That sounds pretty slow and icky.  Unless it does something to keep track
of
> which files are updated as they are updated, so it doesn't have to scan
> through the entire filesystem.
>
>
> > The best part is a feature called a trashbin, if a file was deleted off
the live
> > drive when cpbk is ran (i run it via cronjob) istead of deleting the
> > file off the mirror drive,  it copies it to a trash bin for pierodic
> > manual deletion or recovery...
> >
> > I dont have any expierence with software raid nor IDE raid tho.. to bad
> > you cant get him to go SCSI :\
> >
> > Hope this helps,
> > :Ryan
> >
> > On Mon, 29 Oct 2001, Jonathan Hall wrote:
> >
> > >
> > > I'm building a server that will be using IDE RAID (b/c I can't
convince the
> > > owner to use SCSI bleh...)
> > >
> > > I'll probably have two 7200rpm 80gb ATA100 drives.  Question is...
what sort
> > > of RAID configuration should I use?
> > >
> > > Tomshardware suggests that a Promise FastTrak100 TX2 is the fastest
IDE
> > > hardware RAID solution (at least of the 3 cards it reviewed).
> > >
> > > Is the performance and reliability gained by using hardware RAID
enough to
> > > do that instead of Linux's software RAID?
> > >
> > > Are there other options I should consider in the same price range?
Other
> > > hardware RAID options?
> > >
> > > Thanks.
> > >
> > > --
> > > --
> >
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