Sun StorageTek[TM] 3510FC midplane temperature report higher values after upgrade of ses to 1102

Asset ID:	1-71-1009885.1
Update Date:	2009-09-15
Keywords:

Solution Type Technical Instruction Sure

Solution 1009885.1 : Sun StorageTek[TM] 3510FC midplane temperature report higher values after upgrade of ses to 1102

Related Items


Sun Storage 3510 FC Array

Related Categories


GCS>Sun Microsystems>Storage - Disk>Modular Disk - 3xxx Arrays

PreviouslyPublishedAs
213556

Description
As per new ses 1102 FW, Midplane sensors are not read by ses. This is changed in design by DotHill. Instead, those values are substituted by a calculation from IOM temperature sensors. Refer to internal section for more details.

Steps to Follow
Output with ses 1080 note the values for midplane Temp 0 to 5.

sccli> sh enc
Ch Id Chassis Vendor/Product ID Rev PLD WWNN WWPN
-------------------------------------------------------------------------------
2 12 001E8A SUN StorEdge 3510F A 1080 1000 204000C0FF001E8A 214000C0FF001E8A
Topology: loop(a) Status: OK
3 12 001E8A SUN StorEdge 3510F A 1080 1000 204000C0FF001E8A 224000C0FF001E8A
Topology: loop(b) Status: OK
Enclosure Component Status:
Type Unit Status FRU P/N FRU S/N Add'l Data
------------------------------------------------------------------
Fan 0 OK 370-5398 013584 --
Fan 1 OK 370-5398 013584 --
Fan 2 OK 370-5398 013544 --
Fan 3 OK 370-5398 013544 --
PS 0 OK 370-5398 013584 --
PS 1 OK 370-5398 013544 --
'''Temp 0 OK 370-5535 001E8A temp=21'''
'''Temp 1 OK 370-5535 001E8A temp=22'''
'''Temp 2 OK 370-5535 001E8A temp=21'''
'''Temp 3 OK 370-5535 001E8A temp=21'''
'''Temp 4 OK 370-5535 001E8A temp=20'''
'''Temp 5 OK 370-5535 001E8A temp=20'''
Temp 6 OK 370-5537 001809 temp=35
Temp 7 OK 370-5537 001809 temp=40
Temp 8 OK 370-5537 HH199D temp=35
Temp 9 OK 370-5537 HH199D temp=37
Temp 10 OK 370-5398 013584 temp=18
Temp 11 OK 370-5398 013544 temp=30

-------------------------------------------------------------------------------
Output with ses 1102 note the change in temp sensor values from Temp 0 to 5.
Id Chassis Vendor/Product ID Rev PLD WWNN WWPN
-------------------------------------------------------------------------------

2 12 001E8A SUN StorEdge 3510F A 1102 1000 204000C0FF001E8A 214000C0FF001E8A
Topology: loop(a) Status: OK
3 12 001E8A SUN StorEdge 3510F A 1102 1000 204000C0FF001E8A 224000C0FF001E8A
Topology: loop(b) Status: OK
Enclosure Component Status:
Type Unit Status FRU P/N FRU S/N Add'l Data
Fan 0 OK 370-5398 013584 --
Fan 1 OK 370-5398 013584 --
Fan 2 OK 370-5398 013544 --
Fan 3 OK 370-5398 013544 --
PS 0 OK 370-5398 013584 --
PS 1 OK 370-5398 013544 --
'''Temp 0 OK 370-5535 001E8A temp=35'''
'''Temp 1 OK 370-5535 001E8A temp=36'''
'''Temp 2 OK 370-5535 001E8A temp=38'''
'''Temp 3 OK 370-5535 001E8A temp=38'''
'''Temp 4 OK 370-5535 001E8A temp=35'''
'''Temp 5 OK 370-5535 001E8A temp=35'''
Temp 6 OK 370-5537 001809 temp=35
Temp 7 OK 370-5537 001809 temp=40
Temp 8 OK 370-5537 HH199D temp=35
Temp 9 OK 370-5537 HH199D temp=37
Temp 10 OK 370-5398 013584 temp=18
Temp 11 OK 370-5398 013544 temp=30

Product
Sun StorageTek 3510 FC Array JBOD
Sun StorageTek 3510 FC Array
Sun StorageTek 3510 2U FC Array

Internal Comments
Refer Bug ID 6442784 Evaluation section as why this design change has been done.

It is done to avoid polling the LM75C midplane temperature sensors which

are subject to "lockup" (chip design flaw) which in turn locks up the

I2C busses. By substituting the values from the IOM sensors, no one has

to re-write any scripts that performed enclosure monitoring. The

Midplane sensors are NOT needed for over-temp protection and the IOM

sensors will detect any over-temp condition long before the midplane

sensors would have.

Upcomming SES 1103 is being tested to
Substituted values from IOM temp Sensor to do the following:

IF IOM sensor temp is equal to, or greater than 17C, then IOMtmpSnsr -6C

Else, if IOMtmpSnsr is less than 17C, +2C.

To prevent the bogus Midplane sensor values from causing an

Over-temp event i.e. the midplane hi-temp is 55C but the IOM limit is

60C. Same for the lo-temp, we did not want bogus midplane temps to

trigger below 0C event.

minnow, 3510, temperature, ses
Previously Published As
91201

Change History
Date: 2007-10-29
User Name: 7058
Action: Approved
Comment: Trademarks added.
Spell ck OK.
Offset preformatted text.
OK to publish.
Version: 3
Date: 2007-10-26
User Name: 7058
Action: Accept
Comment:
Version: 0
Date: 2007-10-26
User Name: 84756
Action: Approved
Comment: Hi,
Document is technically accurate. Ok for publishing
Thierry
Version: 0
Product_uuid
e75d2375-605c-11db-a023-080020a9ed93|Sun StorageTek 3510 FC Array JBOD
58553d0e-11f4-11d7-9b05-ad24fcfd42fa|Sun StorageTek 3510 FC Array
fd364806-9dc2-11da-85b4-080020a9ed93|Sun StorageTek 3510 2U FC Array

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