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Subject: RE: Max LUN size
Date: Tue, 5 Jun 2007 15:30:08 -0700
Message-ID: <BB375AF679D4A34E9CA8DFA650E2B04E0402066F@onstor-exch02.onstor.net>
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Thread-Topic: Max LUN size
Thread-Index: AcensfIHr5Lg4LJxR1WTPkxYceSK6wADH7/Q
From: "Bill Nadzam" <bill.nadzam@onstor.com>
To: "Jonathan Goldick" <jonathan.goldick@onstor.com>
Cc: "dl-Cougar" <dl-Cougar@onstor.com>

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The command being used today is SCSI read/write (6) or (10).

The expansion requires the use of read/write(16)
This The structure is=20

{
	byte		opCode;	/* 0x8A for write, 0x88 for read */
	byte		accessFlags;
	uint64_t		LBA;		/* 64 bit addressing of
512 byte blocks */
					/*
9,444,732,965,739,290,426,880 bytes */
	uint32_t		length;		/* Transfer length in
blocks		*/
					/* 2TB max transfer in one
read/write op */
	byte		groupNumber;	/* group codes, Not used for the
most part */
	byte		control;		/* This is not used for
the standard 512 format */
}

> _____________________________________________=20
> From: 	Jonathan Goldick =20
> Sent:	Tuesday, June 05, 2007 1:42 PM
> To:	Bill Nadzam
> Subject:	Max LUN size
>=20
> Bill,
>=20
> I know we are eventually planning on supporting over a 2TB LUN size.
> What will be the new maximum value?
>=20

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<TITLE>RE: Max LUN size</TITLE>
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<!-- Converted from text/rtf format -->

<P><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Arial">The command being =
used today is SCSI read/write (6) or (10).</FONT>
</P>

<P><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Arial">The expansion =
requires the use of read/write(16)</FONT>

<BR><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Arial">This The structure =
is </FONT>
</P>

<P><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Arial">{</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 FACE=3D"Arial">byte&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; opCode; /* 0x8A for write, =
0x88 for read */</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 FACE=3D"Arial">byte&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; accessFlags;</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 =
FACE=3D"Arial">uint64_t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; LBA;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* 64 bit addressing of 512 =
byte blocks */</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 FACE=3D"Arial">/*&nbsp; 9,444,732,965,739,290,426,880 bytes =
*/</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 =
FACE=3D"Arial">uint32_t&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; length; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* Transfer length in =
blocks&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
*/</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 FACE=3D"Arial">/* 2TB max transfer in one read/write op =
*/</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 FACE=3D"Arial">byte&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
groupNumber;&nbsp;&nbsp;&nbsp; /* group codes, Not used for the most =
part */</FONT>

<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT COLOR=3D"#0000FF" =
SIZE=3D2 FACE=3D"Arial">byte&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
control;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; /* This is not used for the =
standard 512 format */</FONT>

<BR><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Arial">}</FONT>
</P>

<P><FONT SIZE=3D1 =
FACE=3D"Tahoma">_____________________________________________ </FONT>

<BR><B><FONT SIZE=3D1 FACE=3D"Tahoma">From: &nbsp;</FONT></B> <FONT =
SIZE=3D1 FACE=3D"Tahoma">Jonathan Goldick&nbsp; </FONT>

<BR><B><FONT SIZE=3D1 FACE=3D"Tahoma">Sent:&nbsp;&nbsp;</FONT></B> <FONT =
SIZE=3D1 FACE=3D"Tahoma">Tuesday, June 05, 2007 1:42 PM</FONT>

<BR><B><FONT SIZE=3D1 =
FACE=3D"Tahoma">To:&nbsp;&nbsp;&nbsp;&nbsp;</FONT></B> <FONT SIZE=3D1 =
FACE=3D"Tahoma">Bill Nadzam</FONT>

<BR><B><FONT SIZE=3D1 =
FACE=3D"Tahoma">Subject:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT>=
</B> <FONT SIZE=3D1 FACE=3D"Tahoma">Max LUN size</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Bill,</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">I know we are eventually planning on =
supporting over a 2TB LUN size.&nbsp; What will be the new maximum =
value?</FONT>
</P>

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