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Re: 2 Terabyte File System Size Limitation

To: Russell Cattelan <cattelan@xxxxxxxxxxx>
Subject: Re: 2 Terabyte File System Size Limitation
From: "Stephen C. Tweedie" <sct@xxxxxxxxxx>
Date: Mon, 4 Sep 2000 17:37:02 +0100
Cc: Andi Kleen <ak@xxxxxxx>, "Davida, Joe" <Joe_Davida@xxxxxxxxxx>, "'linux-xfs@xxxxxxxxxxx'" <linux-xfs@xxxxxxxxxxx>, Stephen Tweedie <sct@xxxxxxxxxx>
In-reply-to: <39AFC301.90EEC7D0@xxxxxxxxxxx>; from cattelan@xxxxxxxxxxx on Fri, Sep 01, 2000 at 09:53:54AM -0500
References: <09D1E9BD9C30D311919200A0C9DD5C2C02536F84@xxxxxxxxxxxxxxxxxxxxxxx> <20000901141936.A10785@xxxxxxxxxxxxxxxxxxx> <39AFBB10.48C59783@xxxxxxxxxxx> <20000901163556.A14222@xxxxxxxxxxxxxxxxxxx> <39AFC301.90EEC7D0@xxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
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Hi,

On Fri, Sep 01, 2000 at 09:53:54AM -0500, Russell Cattelan wrote:

> So I haven't gone and actually looked at code but given the only way to get to
> 16TB is through a volume manager, the process or re-mapping requests
> will bring any individual device under the 2^40 limit but still allow 
> indexing at
> the ll_rw_block level up to 16TB.

No.  LVMs still get passed 512-byte indexed requests.  A LVM exports a
block device, and that block device is just as much subject to the 2TB
limit as the physical block devices underneath it are.  The fact that
the LVM device is a virtual device, not a physical one, does not make
a difference, sadly.

Cheers,
 Stephen

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