RE: Single md physical device limit

Can I just download the SRC RPM from 7.3 and build and install the
binary RPM with the libs, etc. in Red Hat 7.1 and get the intended
functionality or do most people recommend mdadm in place of raidtools?
We currently have to run Red Hat 7.1 because of the database
requirements for an application we are running on the box and cannot
upgrade to 7.3 as of now.

Thanks again to everyone for their help.

Regards,
Andy.

-----Original Message-----
From: Maurice Hilarius [mailto:<redacted>] 
Sent: Monday, August 19, 2002 8:53 PM
To: <redacted>
Cc: Rechenberg, Andrew
Subject: RE: Single md physical device limit


With regards to your message at 03:01 PM 8/19/02, Neil Brown. Where you
stated:

On Monday August 19, ARechenberg@shermanfinancialgroup.com wrote:

quoted

Interesting, when I initially built my array (with RedHat

raidtools-0.90

quoted

not mdctl/mdadm, on kernel 2.4.17) it stated that I could only

stripe

quoted

across 12 devices.  Do you have any idea from which this number

comes?

quoted

Is it an old limit?

Yes, some old limit.  I don't remember the exact details, they were
never important to me, but I think it involved some miscalculation
about how many entries would actually fit in the 4096 byte superblock.

As shipped in Red Hat 7.2 and earlier that limit existed.
It was fixed in 7.3
If you need a copy of the srpm or rpm with the patches applied let me
know.
If you are using Disk Druid from 7.2 or earlier, you will need to update

that as well, as it does not recognize the fix.



With our best regards,

Maurice W. Hilarius       Telephone: 01-780-456-9771
Hard Data Ltd.               FAX:       01-780-456-9772
11060 - 166 Avenue        mailto:maurice@harddata.com
Edmonton, AB, Canada      http://www.harddata.com/
    T5X 1Y3

2.3TB RAID5 NAS server - dual AthlonMP CPU, Linux, $10,995 CAD / $6850
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