XP120000 Upgrades - Which of These Activities Requires Downtime?

[Alzhy]

Firmware --- We're good. Systems can stay up.
Disks/Capacity Expansion - Ditto.
CHiP Blades - Ditto.

But what about:

- Cache Memory
- Shared Memory
- SM Platform Board

Do these require Downtime? Our FE and ASE Teams are a bit of different opinions.

[Torsten.]

Normally no downtime at all - maybe reduced performance due to cache related work.

What is the meaning of "SM Platform Board" ?
Add?

[Alzhy]

SM - Shared Memory Paltform Board.

So the XP can essentially stay Up and avialble right? Just dimished performance but of t will be a light day -- then who cares.

People pray a premium for these Tier-1 Hitachi based arrays to expect utmost up time - right?

[Paul Hawkins]

If cache dims are replaced the whole of cache goes into maintainance mode which means cache-write pending is disabled for up to an hour. Any write intensive application will be severely impacted by this and so this could be considered a real outage.
Obviously mainly read apps will be less affected.
Changing Cache Dims should be considered HIGH impact...
Cheers
paul