2TB size limit on PERC4/ei?

Tue Aug 22 10:09:57 CDT 2006

SCSI is a 32bit protocol. This yeilds a limit of 2TB for addressable
space using the SCSI protocol.

Patrick Boyd
Dell Storage Software Engineer
(512)728-3182

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of Adam Williams
Sent: Tuesday, August 22, 2006 10:06 AM
To: linux-poweredge-Lists
Subject: 2TB size limit on PERC4/ei?

I have a PE 6800 with a PERC 4/ei controller. IT has 10 300GB physical
drives.  In the PERC BIOS setup it shows each drive as 286080MB.  In a
raid 5 it should be 286 x 9 = 2.574TB.  But when I select all 10 drives
into a RAID 5 it shows size as 2097144MB and LD 0.  Then when I accept
that, it pops up LD 1 with size 477576MB.  Am I hitting a 2TB limit?  
Any way to overcome this?  I'd like to have 1 logical drive of 2.574TB,
and not a logical drive of 2TB and a second logical drive of 477GB.

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