RAID5 partition not visible from dmesg/"fdisk -l" but visible fromESXGUI

chaim.rieger at gmail.com chaim.rieger at gmail.com
Tue Jul 8 04:30:46 UTC 2008


Check to see if there's a 2tb limit on 2.4 kernel


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-----Original Message-----
From: Tai Yiap YEO <YEO_Tai_Yiap at sla.gov.sg>

Date: Tue, 8 Jul 2008 12:04:50 
To: <chaim.rieger at gmail.com>
Cc: Chris TAY<Chris_TAY at sla.gov.sg>; General Red Hat Linux discussion list<redhat-list at redhat.com>
Subject: Re: RAID5 partition not visible from dmesg/"fdisk -l" but visible fromESX
 GUI


Hi,

ESX version: 3.5
Kernal: 2.4.21-47.0.1.ELvmnix on an i686

Thanks and Regards

YEO TAI YIAP • IT Technical Support • Information Technology 
Singapore Land Authority • 6323-9816 (DID) • 6325-1413 (Fax) • 
http://www.sla.gov.sg
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development of Singapore.
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chaim.rieger at gmail.com 
08 Jul, 2008 11:59 AM
Please respond to
chaim.rieger at gmail.com


To
"General Red Hat Linux discussion list" <redhat-list at redhat.com>
cc
Chris TAY/SLA/SINGOV at SINGOV, Tai Yiap YEO/SLA/SINGOV at SINGOV
Subject
Re: RAID5 partition not visible from dmesg/"fdisk -l" but visible fromESX 
GUI






What version and kernel ?


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-----Original Message-----
From: "sunhux G" <sunhux at gmail.com>

Date: Tue, 8 Jul 2008 11:57:00 
To: General Red Hat Linux discussion list<redhat-list at redhat.com>
Cc: <chris_tay at sla.gov.sg>; <yeo_tai_yiap at sla.gov.sg>
Subject: RAID5 partition not visible from dmesg/"fdisk -l" but visible 
from
                 ESX GUI


Hi,

I'm asking on behalf of a friend.

He has a 5 TB  SCSI hotplug disk that's configured as hardware
RAID 5.

>From ESX GUI, he could see 4.6TB usable space (ie nett after RAID 5).

After installing Linux OS, he could see 2TB mounted but ESX GUI
showed 4.6TB.

So he issued "fdisk -l" & "dmesg" (actually "dmesg | grep sector")
that I suggested & /dev/sda is shown as 2TB but nothing was shown
for the remaining 2.6TB.

Where's the 2.6TB gone to?

I always thought "fdisk -l" would show every disk resource that's
presented (regardless on what kind of filesystem, be it raw or
GFS or UFS or ...) or I'm missing something?


Thanks
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