From owner-freebsd-stable  Thu Mar 21  9:16:18 2002
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Date: Thu, 21 Mar 2002 09:15:40 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
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To: Dmitry Morozovsky <marck@rinet.ru>
Cc: David Greenman <dg@root.com>,
	"Brian T.Schellenberger" <bts@babbleon.org>,
	"Steve O'Hara-Smith" <steve@sohara.org>, <mrcpu@internetcds.com>,
	<clash@tasam.com>, <questions@FreeBSD.ORG>, <stable@FreeBSD.ORG>
Subject: Re: Problems with large disk. (> 1 TB)
References:  <20020321191258.J64325-100000@woozle.rinet.ru>
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:
:Not that exactly, maybe I'd not clear enough...
:
:Suppose you have bunch of currently available 160G disks. AFAICC we *can*
:split eacho of them into 2 partitions of 80G each, and then stripe/RAID5
:these into two 560G (thus allowed) RAID5 vinum. Or did I miss something?
:
:
:Sincerely,
:D.Marck                                   [DM5020, DM268-RIPE, DM3-RIPN]
:------------------------------------------------------------------------
:*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
:------------------------------------------------------------------------

    You can certainly create a RAID system that exceeds 1TB in physical
    disk storage, just as long as the *logical* storage does not exceed
    1TB.

    So, for example, you could 2TB worth of disks to create a 1TB logical
    disk.

    Or, for example, you could take 12 160G disks, split each one into
    two 80G partitions (say 'd' and 'e'), and the RAID-5 all the 'd'
    partitions together into a 800G logical drive and RAID-5 all the
    'e' partitions together into another 800G logical drive.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>

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