Asset ID:	1-71-1007590.1
Update Date:	2010-09-14
Keywords:

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Solution Type  Technical Instruction Sure

Solution  1007590.1 :   Sun StorEdge[TM] T3, T3+, and 6x20 Arrays: Some Precautions For Upgrading  


PreviouslyPublishedAs
210501

Description
This Technical Instruction applies to the following arrays:

Sun StorEdge[TM] T3
Sun StorEdge[TM] T3+
Sun StorEdge[TM] 6x20

You know that all I/O to the array should be stopped while carrying out a
disk firmware upgrade. However, in spite of this precaution, there have been
cases in which the upgrade was not successful. This article lists some
additional precautions that you can take to make the disk firmware upgrade
successful.

Steps to Follow
The main reason for the disk firmware upgrade to be unsuccessful even with
no host I/O, is the "vol verify" or the "disk scrubber," which may still be
running in the background within the array.

This "vol verify" or "disk scrubber" is internal to the array; you can run it manually or automatically
(for 3.x firmware onwards) by setting a parameter within the array.
To be certain that the disk firmware upgrade proceeds without any problems,
check for the following:
1. Check to make sure that "vol verify" is not running by running "proc
list."
2. If "vol verify" is running, wait until it is completed. Do not kill the
verify process.
3. If you are on T3+ or 6x20 running 3.x firmware, turn off the disk
scrubber, which is an enhancement in the T3 firmware that runs in the
background. It is similar to "vol verify." Use the following command to turn
off the disk scrubber:
sys disk_scrubber off
4. It is also possible that Storade[TM] may have been scheduled to run "vol
verify" during the disk firmware upgrade. Ensure that this schedule is
stopped and that Storade doesn't start "vol verify."
5. Lastly, from firmware 3.1.x onwards, you may have "ondg befit" running.
Turn off the ondg with "sys ondg off."
Once you have completed all of the steps, you can be fairly certain that
there is no more disk activity. You can proceed to upgrade the disk firmware
without any problems.
When the firmware upgrade is done, enable disk_scrubber and ondg once again.
For example:
sys disk_scrubber on
sys ondg befit
If you disabled Storade, you will need to re-enable that as well.

Product
Sun StorageTek T3+/6X20 Controller Firmware 3.1
Sun StorageTek T3+ Array Controller FW 2.1
Sun StorageTek T3+ Array
Sun StorageTek T3 Multi-Platform 1.1
Sun StorageTek T3 Array
Sun StorageTek 6120 Array
Sun StorageTek 6020 Array
Sun StorageTek 6320 System

Internal Comments
Note 1: For SE6320, we have a FIN that mentions the above, but it does not
say anything about T3/T3+.

Note 2: Similar problems can also occur while upgrading the T3 firmware (and
not the disk firmware). Please see bug 4985085, which was fixed in
the 3.1.4 firmware upgrade.

vol-verify, disk_scrubber, T3, T3+, T3B, disk, firmware, upgrade, download
Previously Published As
77343

Change History
Date: 2006-01-23
User Name: 71396
Action: Update Canceled
Comment: *** Restored Published Content *** from ssh audit update
Version: 0
Date: 2006-01-23
User Name: 71396
Action: Update Started
Comment: updating per ssh audit
Version: 0
Date: 2005-09-02


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