HP EVA P6550 HP P6000 EVA Updating Product Software Guide (XCS 11200000) (5697 - Page 23

Selecting a time to perform an online upgrade

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In a few cases, it has been observed that certain fields on the I/O module tab of the Disk Enclosure Properties page (in HP P6000 Command View) appear blank, specifically, Hardware type, Hardware revision, and Assembly serial number. These blank fields do not affect I/O module operation and do not mean that the upgrade was unsuccessful. HP recommends that you wait 20 minutes to see if the fields become populated. If not, you can reset the I/O module; this is an optional step. However, if a disk enclosure reports a failed port or SPOF condition 20 minutes after the upgrade has completed, you must reset the I/O module. See "Resetting the I/O module" (page 54) for the steps to verify the I/O module firmware version and reset the I/O module. Selecting a time to perform an online upgrade To ensure the success of an online upgrade, selecting the appropriate time is essential. The two factors that most affect this selection are: • Criticality of business applications- Do not select a time that could affect critical business applications. • I/O load-Select a period of low I/O activity to ensure that the upgrade is completed as quickly as possible, and to avoid disruptions to hosts and applications due to timeouts. While there are advantages to performing an online upgrade, there are circumstances when it is not advisable. Therefore, give careful consideration to your configuration and your application deployment before making an attempt to do an online upgrade. NOTE: When determining the appropriate time to do an online upgrade, ensure that no configuration-related replication tasks are in process (creating or deleting DR groups, snapshots, snapclones, or mirrorclones, or presenting to hosts). Selecting a time to perform an online upgrade 23

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In a few cases, it has been observed that certain fields on the I/O module tab of the Disk
Enclosure Properties page (in HP P6000 Command View) appear blank, specifically, Hardware
type, Hardware revision, and Assembly serial number. These blank fields do not affect I/O
module operation and do not mean that the upgrade was unsuccessful. HP recommends that
you wait 20 minutes to see if the fields become populated. If not, you can reset the I/O module;
this is an optional step. However, if a disk enclosure reports a failed port or SPOF condition
20 minutes after the upgrade has completed, you must reset the I/O module.
See
“Resetting the I/O module” (page 54)
for the steps to verify the I/O module firmware
version and reset the I/O module.
Selecting a time to perform an online upgrade
To ensure the success of an online upgrade, selecting the appropriate time is essential. The two
factors that most affect this selection are:
•
Criticality of business applications
— Do not select a time that could affect critical business
applications.
•
I/O load
—Select a period of low I/O activity to ensure that the upgrade is completed as
quickly as possible, and to avoid disruptions to hosts and applications due to timeouts.
While there are advantages to performing an online upgrade, there are circumstances when it is
not advisable. Therefore, give careful consideration to your configuration and your application
deployment before making an attempt to do an online upgrade.
NOTE:
When determining the appropriate time to do an online upgrade, ensure that no
configuration-related replication tasks are in process (creating or deleting DR groups, snapshots,
snapclones, or mirrorclones, or presenting to hosts).
Selecting a time to perform an online upgrade
23