SUMMARY:Hard Disk slot restrictions on A5200

From: Bolt, Matt <mbolt_at_aztectech.com>
Date: Fri Jul 20 2001 - 09:55:46 EDT
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Thanks to those who responded (3)...

Here is what I found out:
The slots which are filled with disks at the factory are not magical =
but are
important.  The disks are spaced in the A5200 array (Front:0,5,10
Rear:0,3,6,10) "because circuitry on the disk drives regenerate and =
retime
the data signals which corrects signal quality loss accumulated through =
the
bypass circuitry between empty slots".  In English: you can't put the =
disks
more the 5 (4 empty) slots from one another or you may get intermittent =
and
strange errors.

So as disks are added they should be spaced to minimize the gaps =
between
disks.

Original Question:
Gurus,

This seems like a painfully easy question, but even my master reseller =
can't
answer it.  I've looked in the FAQ, archives, and SUN's many web sites. =
 No
luck.

Are there slot restrictions for disk drives in an SUN StorEdge A5200?
Should certain disk slots be filled before others?

This is how the A5200 is currently setup:
----------------------------------------------------------
                          (/usr/sbin/luxadm version: 1.36  SunOS 5.5.1)
				   SENA           =20
                                 DISK STATUS=20
SLOT   FRONT DISKS       (Node WWN)          REAR DISKS        (Node =
WWN)
0      On (O.K.)         2000002037bea372    On (O.K.)
2000002037bedf41
1      Not Installed                         Not Installed

2      Not Installed                         On (O.K.)
2000002037ef8e7e
3      On (O.K.)         2000002037e3f7a7    Not Installed

4      Not Installed                         On (O.K.)
2000002037bebfbe
5      On (O.K.)         2000002037bec309    Not Installed

6      Not Installed                         On (O.K.)
2000002037bec333
7      Not Installed                         Not Installed

8      On (O.K.)         2000002037ef87a6    On (O.K.)
2000002037e3f2d8
9      Not Installed                         Not Installed

10     On (O.K.)         2000002037beaeea    On (O.K.)
2000002037bee0f8
                                SUBSYSTEM STATUS
FW Revision:1.09   Box ID:0   Node WWN:50800200000a1940   Enclosure =
Name:a
Power Supplies (0,2 in front, 1 in rear)
	0 O.K.(rev.-02)	1 O.K.(rev.-02)	2 O.K.(rev.-02)
Fans (0 in front, 1 in rear)
	0 O.K.(rev.-04)	1 O.K.(rev.-00)
ESI Interface board(IB) (A top, B bottom)
	A: O.K.(rev.-04)
		GBIC module (1 on left, 0 on right in IB)
		0 O.K.(mod.-05)
		1 Not Installed
	B: O.K.(rev.-04)
		GBIC module (1 on left, 0 on right in IB)
		0 O.K.(mod.-05)
		1 Not Installed
Disk backplane (0 in front, 1 in rear)
	Front Backplane: O.K.(rev.-04)
	  Temperature sensors (on front backplane)
	  0:36=BAC 1:36=BAC 2:36=BAC 3:36=BAC 4:36=BAC 5:37=BAC=20
	  6:37=BAC 7:34=BAC 8:36=BAC 9:36=BAC 10:36=BAC  (All temperatures are
NORMAL.)
	Rear Backplane:  O.K.(rev.-04)
	  Temperature sensors (on rear backplane)
	  0:37=BAC 1:37=BAC 2:37=BAC 3:36=BAC 4:36=BAC 5:36=BAC=20
	  6:36=BAC 7:36=BAC 8:37=BAC 9:37=BAC 10:37=BAC  (All temperatures are
NORMAL.)
Interconnect assembly
	O.K.(rev.-02)
Loop  configuration
	Loop A is configured as a single loop.
	Loop B is configured as a single loop.
Language        USA English=09
--------------------------------------------------------
The only difference from a "factory" install (A5200 with 7 disks) is =
slot 3
in the rear is empty.  Is this a problem?

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<TITLE>SUMMARY:Hard Disk slot restrictions on A5200</TITLE>
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<P><FONT SIZE=3D2 FACE=3D"Arial">Thanks to those who responded =
(3)...</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Here is what I found out:</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">The slots which are filled with disks =
at the factory are not magical but are important.&nbsp; The disks are =
spaced in the A5200 array (Front:0,5,10 Rear:0,3,6,10) &quot;because =
circuitry on the disk drives regenerate and retime the data signals =
which corrects signal quality loss accumulated through the bypass =
circuitry between empty slots&quot;.&nbsp; In English: you can't put =
the disks more the 5 (4 empty) slots from one another or you may get =
intermittent and strange errors.</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">So as disks are added they should be =
spaced to minimize the gaps between disks.</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Original Question:</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">Gurus,</FONT>
</P>

<P><FONT SIZE=3D2 FACE=3D"Arial">This seems like a painfully easy =
question, but even my master reseller can't answer it.&nbsp; I've =
looked in the FAQ, archives, and SUN's many web sites.&nbsp; No =
luck.</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">Are there slot restrictions for disk =
drives in an SUN StorEdge A5200?&nbsp; Should certain disk slots be =
filled before others?</FONT></P>

<P><FONT SIZE=3D2 FACE=3D"Arial">This is how the A5200 is currently =
setup:</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier =
New">----------------------------------------------------------</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier =
New">&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; (/usr/sbin/luxadm version: 1.36&nbsp; SunOS 5.5.1)</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; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp;&nbsp; =
SENA&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier =
New">&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; DISK STATUS =
</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">SLOT&nbsp;&nbsp; FRONT =
DISKS&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Node =
WWN)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; REAR =
DISKS&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (Node WWN)</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037bea372&nbsp;&nbsp;&nbsp; On =
(O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037bedf41</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037ef8e7e</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037e3f7a7&nbsp;&nbsp;&nbsp; Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037bebfbe</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037bec309&nbsp;&nbsp;&nbsp; Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037bec333</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
On (O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037ef87a6&nbsp;&nbsp;&nbsp; On =
(O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037e3f2d8</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp; Not =
Installed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nb=
sp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">10&nbsp;&nbsp;&nbsp;&nbsp; On =
(O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037beaeea&nbsp;&nbsp;&nbsp; On =
(O.K.)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
2000002037bee0f8</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier =
New">&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; SUBSYSTEM STATUS</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">FW Revision:1.09&nbsp;&nbsp; =
Box ID:0&nbsp;&nbsp; Node WWN:50800200000a1940&nbsp;&nbsp; Enclosure =
Name:a</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">Power Supplies (0,2 in front, 1 =
in rear)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">0 O.K.(rev.-02) 1 O.K.(rev.-02) 2 =
O.K.(rev.-02)</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">Fans (0 in front, 1 in =
rear)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">0 O.K.(rev.-04) 1 O.K.(rev.-00)</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">ESI Interface board(IB) (A top, =
B bottom)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">A: O.K.(rev.-04)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">GBIC module (1 on left, 0 on right in IB)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">0 O.K.(mod.-05)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">1 Not Installed</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">B: O.K.(rev.-04)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">GBIC module (1 on left, 0 on right in IB)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">0 O.K.(mod.-05)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">1 Not Installed</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">Disk backplane (0 in front, 1 =
in rear)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">Front Backplane: O.K.(rev.-04)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp; Temperature sensors (on front =
backplane)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp; 0:36=BAC 1:36=BAC 2:36=BAC 3:36=BAC =
4:36=BAC 5:37=BAC </FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp; 6:37=BAC 7:34=BAC 8:36=BAC 9:36=BAC =
10:36=BAC&nbsp; (All temperatures are NORMAL.)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">Rear Backplane:&nbsp; O.K.(rev.-04)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp; Temperature sensors (on rear =
backplane)</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp; 0:37=BAC 1:37=BAC 2:37=BAC 3:36=BAC =
4:36=BAC 5:36=BAC </FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">&nbsp; 6:36=BAC 7:36=BAC 8:37=BAC 9:37=BAC =
10:37=BAC&nbsp; (All temperatures are NORMAL.)</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">Interconnect assembly</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">O.K.(rev.-02)</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier New">Loop&nbsp; configuration</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">Loop A is configured as a single loop.</FONT>
<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <FONT SIZE=3D2 =
FACE=3D"Courier New">Loop B is configured as a single loop.</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier =
New">Language&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; USA =
English&nbsp;&nbsp;&nbsp;&nbsp; </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Courier =
New">--------------------------------------------------------</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">The only difference from a =
&quot;factory&quot; install (A5200 with 7 disks) is slot 3 in the rear =
is empty.&nbsp; Is this a problem?<B></B></FONT><B></B>
</P>

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Received on Fri Jul 20 14:55:46 2001

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