Concurrent maintenance is the ability to process I/O operations
to a controller while simultaneously doing maintenance on it.
Important: An EMC field engineer must complete
all maintenance procedures.
The EMC CLARiiON FC series and
the Lenovo Storage V seriesclustered system allow
concurrent replacement of the following components:
- Disk drives
- Controller fans (fans must be replaced within 2 minutes or controllers
are shut down)
- Disk enclosure fans (fans must be replaced within 2 minutes or
controllers are shut down)
- Controller (service processor: you must first disable cache)
- Fibre Channel Bypass cards (LCC)
- Power supplies
(you must first remove fans)
- Uninterruptible power supply battery (SPS)
EMC CLARiiON FC devices require that the I/O is quiesced during
code update. Consequently, the Lenovo Storage V series system
does not support concurrent update of the FC controller code.
The
EMC CLARiiON CX series and the Lenovo Storage V series system
allow concurrent replacement of the following components:
- Disk drives
- Controller (service processor or drawer controller)
- Power/cooling modules (modules must be replaced within 2 minutes
or controllers are shut down)
- Uninterruptible power supply battery (SPS)
The Lenovo Storage V series system
and EMC CLARiiON CX devices support concurrent code update of the
CX controllers.
Note: - EMC CLARiiON procedures for concurrent update must be followed
in all cases.
- The CX Series also has a feature called Data In Place Update
which allows you to update from one model to another (for example,
from the CX200 to the CX600) with no data loss or migration required.
This is not a concurrent operation.