Disk Geometry Errors.

[jdow]

From: "Jerry McAllister" <jerrymc at clunix.cl.msu.edu>

>> 
>> One thing that comes to mind, as I read below, is that it appears you
>> setup the drives for RAID 1. Then you transplanted to them to a RAID 5
>> controller. "Of course" the partition data will be wrong. The hidden
>> blocks the two RAID controllers use are probably different and the
>> method of storage for RAID 5 is quite different from that used by RAID 1.
>> 
>> (Worse yet, you may have managed to hose the drives so that any data
>> on them is gone.)
>> 
>> {^_^}   Joanne
>> ----- Original Message ----- 
>> From: "Lisandro Grullon" <lisandro.grullon at gmail.com>
>> 
>> Hi Kevin and thanks for repplyng, sysinstall does not crach at all, the
>> problem is that the information is not retain by the label. I keep getting
>> that contact "Disk Geometry" error when I try fdisk into the volume/drive.
>> Any ideas what is happening. let me know what other information you may need
>> to assist me further.
> 
> I didn't follow all of this thread, so I may be missing something, but
> check the FAQs and the list archives.   Geometry error messages and
> apparent (but not actual) mismatched have been discussed many times.
> 
> Nowdays disk geometry as used by the OS is generally "virtual" and does 
> not exactly reflect the actual physical geometry.   In other words, from 
> the point of view of how you use it, unless you are creating special driver 
> code, the geometry is fiction and, as long as it works, take what the OS 
> says and ignore any messages from fdisk.
> 
> Now, if it is truly failing, you have non-fictional problems.   

That is the lecture I was getting ready to deliver when I noticed
RAID 5 and RAID 1 with different controllers. RAID 5 and RAID 1 are
not compatible. And there is a good chance that two different breeds
of RAID firmware would store meta data for disk format differently.

{^_-}   (Heck, I have seen two Promise cards that store it differently
        or seemed to.)

>> On 5/24/06, Kevin Kinsey <kdk at daleco.biz> wrote:
>> >
>> > Lisandro Grullon wrote:
>> > > Good Morning,
>> > >
>> > > Last night I was trying installing a new Areca controller 1120 8 ports
>> > > using a 5 bay (300GB seagate) drives Raid 5. The main OS is install
>> > using the
>> > > SATA controller in RAID 1 configuration of the mother board, the
>> > addition of
>> > > last night was a separate controller I install.The install when good and
>> > I
>> > > installed my modules in the kernel, now my problem is when I try to
>> > > partition the volume using fdisk/label with system install it is giving
>> > me
>> > > nasty disk geometry incorrect error, can anyone tell me what is this all
>> > > about? Thank you.
>> >
>> > We'd probably need some more information.  Does sysinstall crash?
>> > Does the fdisk information get written to disk anyway?  The label?
>> >
>> > KDK
>> >
>> > --
>> > Zero Mostel: That's it baby!  When you got it, flaunt it!  Flaunt it!
>> >                 -- Mel Brooks, The Producers
>> >
>> >
>> 
>> 
>> -- 
>> Lisandro Grullon
>> New York City College of Technology
>> Division of Continuing Education
>> Director of Network Operations
>> Lisandro Office:    1718-552-1178
>> Lisandro E-mail:   lgrullon at citytech.cuny.edu
>> "The only reason for time is so that everything doesn't happen at once.".
>> <Albert Einstein>
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